From de034858c7aca5ec8c77a5508f4b93256e752f2a Mon Sep 17 00:00:00 2001
From: Pierre Yager <pierre@levosgien.net>
Date: Wed, 6 Feb 2013 23:24:55 +0100
Subject: [PATCH 01/55] Exposed DataSet#index property

Use of index property is required for me to be able to draw a curve based on a simple dataset of values (x, y) :

dataset = Gnuplot::DataSet.new( [x, y] ) do |ds|
  ds.with = "linespoints"
  ds.notitle
  ds.using = "1:2"
  ds.index = 0
end
---
 lib/gnuplot.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index 0ee51d4..89cae33 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -210,11 +210,11 @@ def to_gplot (io = "")
   # @todo Use the delegator to delegate to the data property.
 
   class DataSet 
-    attr_accessor :title, :with, :using, :data, :linewidth, :linecolor, :matrix, :smooth, :axes
+    attr_accessor :title, :with, :using, :data, :linewidth, :linecolor, :matrix, :smooth, :axes, :index
   
     def initialize (data = nil)
       @data = data
-      @title = @with = @using = @linewidth = @linecolor = @matrix = @smooth = @axes = nil # avoid warnings
+      @title = @with = @using = @linewidth = @linecolor = @matrix = @smooth = @axes = @index = nil # avoid warnings
       yield self if block_given?
     end
         
@@ -228,6 +228,8 @@ def plot_args (io = "")
 
       io << ( (@data.instance_of? String) ? @data : "'-'" )
 
+      io << " index #{@index}" if @index
+
       io << " using #{@using}" if @using
      
       io << " axes #{@axes}" if @axes

From 9676b48855065062f25818cc23e71e219f722711 Mon Sep 17 00:00:00 2001
From: Rafael Rosa Fu <rafaelrosafu@gmail.com>
Date: Tue, 12 Feb 2013 18:46:03 -0500
Subject: [PATCH 02/55] Make 3d_surface_plot behave like the other examples

It was missing lib directory in the load path
---
 examples/3d_surface_plot.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/3d_surface_plot.rb b/examples/3d_surface_plot.rb
index 3c02451..942d8ce 100644
--- a/examples/3d_surface_plot.rb
+++ b/examples/3d_surface_plot.rb
@@ -1,3 +1,4 @@
+$LOAD_PATH.unshift(File.expand_path('../../lib', __FILE__))
 require "gnuplot"
 
 Gnuplot.open do |gp|
@@ -11,4 +12,4 @@
     ]
   end
   sleep 10
-end
\ No newline at end of file
+end

From e7d2e541e7644c6073157bd9e1eeccc96758dbfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magnus=20M=C3=BCller?= <mamuelle@informatik.hu-berlin.de>
Date: Tue, 30 Apr 2013 09:36:50 +0200
Subject: [PATCH 03/55] Add helper to create linestyles

---
 lib/gnuplot.rb       | 69 ++++++++++++++++++++++++++++++++++++++++++--
 test/test_gnuplot.rb | 28 ++++++++++++++++++
 2 files changed, 95 insertions(+), 2 deletions(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index 89cae33..f8faf42 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -97,6 +97,7 @@ def initialize (io = nil, cmd = "plot")
       @settings = []
       @arbitrary_lines = []
       @data = []
+      @styles = []
       yield self if block_given?
       puts "writing this to gnuplot:\n" + to_gplot + "\n" if $VERBOSE
 
@@ -147,6 +148,64 @@ def [] ( var )
       end
     end
 
+    class Style
+      attr_accessor :linestyle, :linetype, :linewidth, :linecolor,
+        :pointtype, :pointsize, :fill, :index
+
+      alias :ls :linestyle
+      alias :lt :linetype
+      alias :lw :linewidth
+      alias :lc :linecolor
+      alias :pt :pointtype
+      alias :ps :pointsize
+      alias :fs :fill
+
+      alias :ls= :linestyle=
+      alias :lt= :linetype=
+      alias :lw= :linewidth=
+      alias :lc= :linecolor=
+      alias :pt= :pointtype=
+      alias :ps= :pointsize=
+      alias :fs= :fill=
+
+      STYLES = [:ls, :lt, :lw, :lc, :pt, :ps, :fs]
+
+      def Style.increment_index
+        @index ||= 0
+        @index += 1
+
+        @index
+      end
+
+      def initialize
+        STYLES.each do |s|
+          send("#{s}=", nil)
+        end
+        yield self if block_given?
+
+        # only set the index if the user didn't do it
+        @index = Style::increment_index if index.nil?
+      end
+
+      def to_s
+        str = "set style line #{index}"
+        STYLES.each do |s|
+          style = send(s)
+          if not style.nil?
+            str << " #{s} #{style}"
+          end
+        end
+
+        str
+      end
+    end
+
+    # Create a gnuplot linestyle
+    def style &blk
+      s = Style.new &blk
+      @styles << s
+      s
+    end
 
     def add_data ( ds )
       @data << ds
@@ -157,6 +216,7 @@ def to_gplot (io = "")
       @settings.each do |setting|
           io << setting.map(&:to_s).join(" ") << "\n"
       end
+      @styles.each{|s| io << s.to_s << "\n"}
       @arbitrary_lines.each{|line| io << line << "\n" }
 
       io
@@ -210,11 +270,15 @@ def to_gplot (io = "")
   # @todo Use the delegator to delegate to the data property.
 
   class DataSet 
-    attr_accessor :title, :with, :using, :data, :linewidth, :linecolor, :matrix, :smooth, :axes, :index
+    attr_accessor :title, :with, :using, :data, :linewidth, :linecolor, :matrix, :smooth, :axes, :index, :linestyle
+
+    alias :ls :linestyle
+    alias :ls= :linestyle=
   
     def initialize (data = nil)
       @data = data
-      @title = @with = @using = @linewidth = @linecolor = @matrix = @smooth = @axes = @index = nil # avoid warnings
+      @linestyle = @title = @with = @using = @linewidth = @linecolor = @matrix =
+          @smooth = @axes = @index = nil # avoid warnings
       yield self if block_given?
     end
         
@@ -245,6 +309,7 @@ def plot_args (io = "")
       io << " with #{@with}" if @with
       io << " linecolor #{@linecolor}" if @linecolor
       io << " linewidth #{@linewidth}" if @linewidth
+      io << " linestyle #{@linestyle.index}" if @linestyle
       io
     end
 
diff --git a/test/test_gnuplot.rb b/test/test_gnuplot.rb
index f873143..6b301e9 100644
--- a/test/test_gnuplot.rb
+++ b/test/test_gnuplot.rb
@@ -90,6 +90,34 @@ def test_unset
     assert_nil plot["title"]
   end
 
+  def test_style
+    plot = Gnuplot::Plot.new do |p|
+      s1 = p.style do |s|
+        s.ls = 1
+        s.lt = 1
+        s.lc = 1
+        s.pt = 1
+        s.ps = 1
+      end
+      assert s1.to_s == "set style line 1 ls 1 lt 1 lc 1 pt 1 ps 1", "correct style definition"
+      assert s1.index == 1, "set index correctly"
+
+      s2 = p.style do |s|
+        s.ls = 2
+      end
+      assert s2.to_s == "set style line 2 ls 2", "correct style definition"
+      assert s2.index == 2, "index must be incremented"
+
+      ds = Gnuplot::DataSet.new do |ds|
+        ds.with = "lines" 
+        ds.linestyle = s1
+        ds.data = [ [0, 1, 2], [1, 2, 5] ]
+      end
+
+      assert ds.plot_args == "'-' with lines linestyle 1", "convert linestyle to index" # index of s1
+    end
+  end
+
 end
 
 

From 5d827be315593d7bd6da44c2a6569acc7e6565a8 Mon Sep 17 00:00:00 2001
From: Russell Smith <ukd1@users.noreply.github.com>
Date: Sat, 8 Mar 2014 13:49:13 -0800
Subject: [PATCH 04/55] Fix unescaped quote in example

---
 README.textile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.textile b/README.textile
index e888dd6..04a0280 100644
--- a/README.textile
+++ b/README.textile
@@ -180,7 +180,7 @@ end
 You can also add arbitrary lines to the output 
 
 <pre>
-plot.arbitrary_lines << "set ylabel \"y label" font \"Helvetica,20\""
+plot.arbitrary_lines << "set ylabel \"y label\" font \"Helvetica,20\""
 </pre>
 
 See more in the examples folder.  Also since this is basically just a wrapper for gnuplot itself, you should be able to do anything that it can do (demos: 

From d9c2b05417100b6fdc098321268e2ec6d2158875 Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne.2@gmail.com>
Date: Sat, 15 Mar 2014 01:07:33 -0400
Subject: [PATCH 05/55] Handle empty arrays in Array#to_gplot.

---
 lib/gnuplot.rb       | 81 ++++++++++++++++++++++----------------------
 test/test_gnuplot.rb | 38 +++++++++++++--------
 2 files changed, 64 insertions(+), 55 deletions(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index f8faf42..ff10a75 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -1,21 +1,21 @@
 # Methods and variables for interacting with the gnuplot process.  Most of
 # these methods are for sending data to a gnuplot process, not for reading from
-# it.  Most of the methods are implemented as added methods to the built in 
+# it.  Most of the methods are implemented as added methods to the built in
 # classes.
 
 require 'matrix'
- 
+
 module Gnuplot
 
   # Trivial implementation of the which command that uses the PATH environment
   # variable to attempt to find the given application.  The application must
   # be executable and reside in one of the directories in the PATH environment
   # to be found.  The first match that is found will be returned.
-  # 
+  #
   # bin [String] The name of the executable to search for.
-  # 
+  #
   # Return the full path to the first match or nil if no match is found.
-  # 
+  #
   def Gnuplot.which ( bin )
     if RUBY_PLATFORM =~ /mswin|mingw/
       all = [bin, bin + '.exe']
@@ -41,18 +41,18 @@ def Gnuplot.which_helper bin
 
     # This is an implementation that works when the which command is
     # available.
-    # 
+    #
     # IO.popen("which #{bin}") { |io| return io.readline.chomp }
 
     return nil
-  end 
+  end
 
   # Find the path to the gnuplot executable.  The name of the executable can
   # be specified using the RB_GNUPLOT environment variable but will default to
-  # the command 'gnuplot'.  
-  # 
+  # the command 'gnuplot'.
+  #
   # persist [bool] Add the persist flag to the gnuplot executable
-  # 
+  #
   # Return the path to the gnuplot executable or nil if one cannot be found.
   def Gnuplot.gnuplot( persist = true )
     exe_loc = which( ENV['RB_GNUPLOT'] || 'gnuplot' )
@@ -61,15 +61,15 @@ def Gnuplot.gnuplot( persist = true )
     cmd += " -persist" if persist
     cmd
   end
-    
+
   # Open a gnuplot process that exists in the current PATH.  If the persist
   # flag is true then the -persist flag is added to the command line.  The
-  # path to the gnuplot executable is determined using the 'which' command. 
+  # path to the gnuplot executable is determined using the 'which' command.
   #
   # See the gnuplot documentation for information on the persist flag.
   #
   # <b>todo</b> Add a method to pass the gnuplot path to the function.
-  
+
   def Gnuplot.open( persist=true )
     cmd = Gnuplot.gnuplot( persist )
     IO::popen( cmd, "w+") { |io|
@@ -77,11 +77,11 @@ def Gnuplot.open( persist=true )
       io.close_write
       @output = io.read
     }
-    return @output	
+    return @output
   end
-  
-    
-    
+
+
+
   # Holds command information and performs the formatting of that command
   # information to a Gnuplot process.  When constructing a new plot for
   # gnuplot, this is the first object that must be instantiated.  On this
@@ -101,7 +101,7 @@ def initialize (io = nil, cmd = "plot")
       yield self if block_given?
       puts "writing this to gnuplot:\n" + to_gplot + "\n" if $VERBOSE
 
-      if io    
+      if io
         io << to_gplot
         io << store_datasets
       end
@@ -119,7 +119,7 @@ def method_missing( methId, *args )
 
     # Set a variable to the given value.  +Var+ must be a gnuplot variable and
     # +value+ must be the value to set it to.  Automatic quoting will be
-    # performed if the variable requires it.  
+    # performed if the variable requires it.
     #
     # This is overloaded by the +method_missing+ method so see that for more
     # readable code.
@@ -230,7 +230,7 @@ def store_datasets (io = "")
         v = @data.collect { |ds| ds.to_gplot }
       	io << v.compact.join("e\n")
       end
-      
+
       io
     end
   end
@@ -243,7 +243,7 @@ class SPlot < Plot
     def initialize (io = nil, cmd = "splot")
       super
     end
-    
+
     # Currently using the implementation from parent class Plot.
     # Leaving the method explicit here, though, as to allow an specific
     # implementation for SPlot in the future.
@@ -258,7 +258,7 @@ def to_gplot (io = "")
   # has a reference to the actual data being plotted as well as settings that
   # control the "plot" command.  The data object must support the to_gplot
   # command.
-  # 
+  #
   # +data+ The data that will be plotted.  The only requirement is that the
   # object understands the to_gplot method.
   #
@@ -269,25 +269,25 @@ def to_gplot (io = "")
   #
   # @todo Use the delegator to delegate to the data property.
 
-  class DataSet 
+  class DataSet
     attr_accessor :title, :with, :using, :data, :linewidth, :linecolor, :matrix, :smooth, :axes, :index, :linestyle
 
     alias :ls :linestyle
     alias :ls= :linestyle=
-  
+
     def initialize (data = nil)
       @data = data
       @linestyle = @title = @with = @using = @linewidth = @linecolor = @matrix =
           @smooth = @axes = @index = nil # avoid warnings
       yield self if block_given?
     end
-        
+
     def notitle
       @title = "notitle"
     end
 
     def plot_args (io = "")
-      
+
       # Order of these is important or gnuplot barfs on 'em
 
       io << ( (@data.instance_of? String) ? @data : "'-'" )
@@ -295,13 +295,13 @@ def plot_args (io = "")
       io << " index #{@index}" if @index
 
       io << " using #{@using}" if @using
-     
+
       io << " axes #{@axes}" if @axes
- 
+
       io << case @title
             when /notitle/ then " notitle"
             when nil       then ""
-            else " title '#{@title}'" 
+            else " title '#{@title}'"
             end
 
       io << " matrix" if @matrix
@@ -328,19 +328,20 @@ def to_gsplot
       else @data.to_gsplot
       end
     end
-    
+
   end
 end
 
 class Array
   def to_gplot
-    if ( self[0].kind_of? Array ) then
+    return "" if self.empty?
+
+    case self[0]
+    when Array
       tmp = self[0].zip( *self[1..-1] )
       tmp.collect { |a| a.join(" ") }.join("\n") + "\ne"
-    elsif ( self[0].kind_of? Numeric ) then
-      s = ""
-      self.length.times { |i| s << "#{self[i]}\n" }
-      s
+    when Numeric
+      self.join("\n")
     else
       self[0].zip( *self[1..-1] ).to_gplot
     end
@@ -348,7 +349,7 @@ def to_gplot
 
   def to_gsplot
     f = ""
-    
+
     if ( self[0].kind_of? Array ) then
       x = self[0]
       y = self[1]
@@ -365,16 +366,16 @@ def to_gsplot
     else
       self[0].zip( *self[1..-1] ).to_gsplot
     end
-    
+
     f
   end
 end
-   
+
 class Matrix
   def to_gplot (x = nil, y = nil)
     xgrid = x || (0...self.column_size).to_a
     ygrid = y || (0...self.row_size).to_a
-  
+
     f = ""
     ygrid.length.times do |j|
       y = ygrid[j]
@@ -384,7 +385,7 @@ def to_gplot (x = nil, y = nil)
         end
       end
     end
-    
+
     f
   end
 
diff --git a/test/test_gnuplot.rb b/test/test_gnuplot.rb
index 6b301e9..18d8e34 100644
--- a/test/test_gnuplot.rb
+++ b/test/test_gnuplot.rb
@@ -4,15 +4,23 @@
 require 'test/unit'
 
 class StdDataTest < Test::Unit::TestCase
-    
+
   def test_array_1d
     data = (0..5).to_a
     ds = Gnuplot::DataSet.new( data )
-    
+
     assert data == ds.data
     assert data.join("\n") + "\n", ds.to_gplot
   end
 
+  def test_empty_array
+    data = []
+    ds = Gnuplot::DataSet.new( data )
+
+    assert data == ds.data
+    assert "" == ds.to_gplot
+  end
+
 
   # Test a multidimensional array.
 
@@ -20,10 +28,10 @@ def test_array_nd
     d1 = (0..3).to_a
     d2 = d1.collect { |v| 3 * v }
     d3 = d2.collect { |v| 4 * v }
-    
+
     data = [ d1, d2, d3 ]
     ds = Gnuplot::DataSet.new( data )
-    
+
     assert data == ds.data
     assert "0 0 0\n1 3 12\n2 6 24\n3 9 36\n", ds.to_gplot
   end
@@ -34,24 +42,24 @@ class DataSetTest < Test::Unit::TestCase
 
   def test_yield_ctor
     ds = Gnuplot::DataSet.new do |ds|
-      ds.with = "lines" 
+      ds.with = "lines"
       ds.using = "1:2"
       ds.data = [ [0, 1, 2], [1, 2, 5] ]
     end
-    
+
     assert "lines", ds.with
     assert "1:2",   ds.using
     assert nil == ds.title
     assert [ [0, 1, 2], [1, 2, 5] ] == ds.data
     assert "'-' using 1:2 with lines",  ds.plot_args
-    assert "0 1\n1 2\n2 5\n", ds.to_gplot 
+    assert "0 1\n1 2\n2 5\n", ds.to_gplot
   end
-  
+
 end
 
 
 class PlotTest < Test::Unit::TestCase
-  
+
   def test_no_data
     plot = Gnuplot::Plot.new do |p|
       p.set "output", "'foo'"
@@ -60,10 +68,10 @@ def test_no_data
     end
 
     assert( plot.settings ==
-		 [ [:set, "output", "'foo'"], 
+		 [ [:set, "output", "'foo'"],
 		   [:set, "terminal", "postscript enhanced"],
                    [:unset, "border"] ] )
-    
+
 
     assert( plot.to_gplot, \
 		 "set output 'foo'\nset terminal postscript enhanced\n" )
@@ -109,7 +117,7 @@ def test_style
       assert s2.index == 2, "index must be incremented"
 
       ds = Gnuplot::DataSet.new do |ds|
-        ds.with = "lines" 
+        ds.with = "lines"
         ds.linestyle = s1
         ds.data = [ [0, 1, 2], [1, 2, 5] ]
       end
@@ -134,7 +142,7 @@ class GnuplotModuleTest
 
   def test_which
     # Put the spaces around the command to make sure that it gets stripped
-    # properly. 
+    # properly.
     assert( CONFIG["SHELL"], Gnuplot::which(" sh " ) )
     assert( CONFIG["SHELL"], Gnuplot::which( CONFIG["SHELL"] ) )
   end
@@ -151,10 +159,10 @@ def test_gnuplot
     # name (one that is in the path) then I should get the shell name as the
     # result of the gnuplot call.
 
-    ENV["RB_GNUPLOT"] = "sh" 
+    ENV["RB_GNUPLOT"] = "sh"
     assert( CONFIG["SHELL"], Gnuplot.gnuplot(false) )
   end
-      
+
 end
 
 

From 3062885c7635677210e6e956f737a8bbb0640cf6 Mon Sep 17 00:00:00 2001
From: Martin Asser Hansen <mail@maasha.dk>
Date: Wed, 25 Jun 2014 15:41:08 +0200
Subject: [PATCH 06/55] output verbose message to  instead of

---
 lib/gnuplot.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index ff10a75..592b3e6 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -99,7 +99,7 @@ def initialize (io = nil, cmd = "plot")
       @data = []
       @styles = []
       yield self if block_given?
-      puts "writing this to gnuplot:\n" + to_gplot + "\n" if $VERBOSE
+      $stderr.puts "writing this to gnuplot:\n" + to_gplot + "\n" if $VERBOSE
 
       if io
         io << to_gplot

From 65a1167764fec113294c9d509e5c3a15f0aad7cb Mon Sep 17 00:00:00 2001
From: Joe Norton <joenorton75@gmail.com>
Date: Sun, 29 Jun 2014 21:03:58 -0700
Subject: [PATCH 07/55] add test as default task in rake

---
 Rakefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index 850c6d3..d8ae9ee 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,5 +1,5 @@
 require 'jeweler2'
-Jeweler::Tasks.new do |s|
+Jeweler::Tasks.new do |s|
   s.name = 'gnuplot'
   s.description = s.summary = "Utility library to aid in interacting with gnuplot from ruby"
   s.version = "2.6.1"
@@ -8,6 +8,8 @@ Jeweler::Tasks.new do |s|
   s.homepage = "http://github.com/rdp/ruby_gnuplot/tree/master"
 end
 
+task :default => :test
+
 desc 'run unit tests'
 task :test do
   Dir.chdir 'test'

From 11daf3a201a629be9916e89bdeca7bd1945d420e Mon Sep 17 00:00:00 2001
From: Dustin Morrill <dmorrill10@gmail.com>
Date: Wed, 9 Jul 2014 13:15:23 -0600
Subject: [PATCH 08/55] Cleaned up packaging system, listed dependencies
 explicitly, removed warnings from tests, added tasks to Rakefile, and added
 version file

---
 Gemfile                     |  4 ++++
 Rakefile                    | 36 ++++++++++++++++++++----------------
 lib/ruby_gnuplot/version.rb |  3 +++
 ruby_gnuplot.gemspec        | 21 +++++++++++++++++++++
 test/arrtest.rb             | 12 ++++++------
 test/histtest.rb            |  4 ++--
 test/multtest.rb            | 12 ++++++------
 test/sinwave.rb             | 12 ++++++------
 test/test_gnuplot.rb        | 12 ++++++------
 9 files changed, 74 insertions(+), 42 deletions(-)
 create mode 100644 Gemfile
 create mode 100644 lib/ruby_gnuplot/version.rb
 create mode 100644 ruby_gnuplot.gemspec

diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..1ad452f
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in acpc_dealer.gemspec
+gemspec
diff --git a/Rakefile b/Rakefile
index d8ae9ee..a0ac068 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,21 +1,25 @@
-require 'jeweler2'
-Jeweler::Tasks.new do |s|
-  s.name = 'gnuplot'
-  s.description = s.summary = "Utility library to aid in interacting with gnuplot from ruby"
-  s.version = "2.6.1"
-  s.authors='roger pack'
-  s.email = "rogerpack2005@gmail.com"
-  s.homepage = "http://github.com/rdp/ruby_gnuplot/tree/master"
-end
+require "bundler/gem_tasks"
+require 'rake'
+require 'rake/clean'
+require 'rake/testtask'
+require 'rubygems/package_task'
 
-task :default => :test
+require_relative 'lib/ruby_gnuplot/version'
 
 desc 'run unit tests'
-task :test do
-  Dir.chdir 'test'
-  for file in Dir['*']
-    system("ruby #{file}")
-  end
+task :default => [:test]
+
+task :build
+
+Rake::TestTask.new do |t|
+  t.libs << "lib" << 'spec/support'
+  t.test_files = FileList['test/**/*.rb']
+  t.verbose = false
+  t.warning = false
+end
+
+def gemspec
+  @clean_gemspec ||= eval(File.read(File.expand_path('../ruby_gnuplot.gemspec', __FILE__)))
 end
 
-Jeweler::RubygemsDotOrgTasks.new
\ No newline at end of file
+Gem::PackageTask.new(gemspec) { |pkg| }
diff --git a/lib/ruby_gnuplot/version.rb b/lib/ruby_gnuplot/version.rb
new file mode 100644
index 0000000..ba6c60b
--- /dev/null
+++ b/lib/ruby_gnuplot/version.rb
@@ -0,0 +1,3 @@
+module RubyGnuplot
+  VERSION = "2.6.1"
+end
diff --git a/ruby_gnuplot.gemspec b/ruby_gnuplot.gemspec
new file mode 100644
index 0000000..c9cf609
--- /dev/null
+++ b/ruby_gnuplot.gemspec
@@ -0,0 +1,21 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'ruby_gnuplot/version'
+
+Gem::Specification.new do |s|
+  s.name = 'gnuplot'
+  s.description = s.summary = "Utility library to aid in interacting with gnuplot from ruby"
+  s.version = RubyGnuplot::VERSION
+  s.authors='roger pack'
+  s.email = "rogerpack2005@gmail.com"
+  s.homepage = "http://github.com/rdp/ruby_gnuplot/tree/master"
+  s.license = "BSD"
+
+  s.files         = `git ls-files`.split($/)
+  s.executables   = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  s.test_files    = s.files.grep(%r{^(test|spec|features)/})
+  s.require_paths = ["lib"]
+
+  s.add_development_dependency 'minitest'
+end
diff --git a/test/arrtest.rb b/test/arrtest.rb
index 208072c..00a95a3 100644
--- a/test/arrtest.rb
+++ b/test/arrtest.rb
@@ -1,12 +1,12 @@
-require '../lib/gnuplot'
+require 'gnuplot'
 
 Gnuplot.open do |gp|
   Gnuplot::Plot.new( gp ) do |plot|
-  
+
     plot.title  "Array Plot Example"
     plot.ylabel "x"
     plot.xlabel "x^2"
-    
+
     x = (0..50).collect { |v| v.to_f }
     y = x.collect { |v| v ** 2 }
 
@@ -14,8 +14,8 @@
       ds.with = "linespoints"
       ds.notitle
     end
-    
+
   end
-  
+
 end
-    
+
diff --git a/test/histtest.rb b/test/histtest.rb
index dd09e24..d90bc0d 100644
--- a/test/histtest.rb
+++ b/test/histtest.rb
@@ -1,4 +1,4 @@
-require '../lib/gnuplot'
+require 'gnuplot'
 
 Gnuplot.open do |gp|
     gp << "bin(x, s) = s*int(x/s)\n"
@@ -10,7 +10,7 @@
 
 	x = (0..500).collect { |v| (rand()-0.5)**3 }
 	plot.data << Gnuplot::DataSet.new( [x] ) do |ds|
-	    ds.title = "smooth frequency" 
+	    ds.title = "smooth frequency"
 	    ds.using = "(bin($1,.01)):(1.)"
 	    ds.smooth = "freq"
 	    ds.with = "boxes"
diff --git a/test/multtest.rb b/test/multtest.rb
index 1aeb1d5..3bf4983 100644
--- a/test/multtest.rb
+++ b/test/multtest.rb
@@ -1,14 +1,14 @@
-require '../lib/gnuplot'
+require 'gnuplot'
 
 # File.open( "gnuplot.dat", "w") do |gp|
 Gnuplot.open do |gp|
   Gnuplot::Plot.new( gp ) do |plot|
-  
+
     plot.xrange "[-10:10]"
     plot.title  "Sin Wave Example"
     plot.ylabel "x"
     plot.xlabel "sin(x)"
-    
+
     x = (0..50).collect { |v| v.to_f }
     y = x.collect { |v| v ** 2 }
 
@@ -18,7 +18,7 @@
 	ds.title = "String function"
 	ds.linewidth = 4
       },
-    
+
       Gnuplot::DataSet.new( [x, y] ) { |ds|
 	ds.with = "linespoints"
 	ds.title = "Array data"
@@ -26,6 +26,6 @@
     ]
 
   end
-  
+
 end
-    
+
diff --git a/test/sinwave.rb b/test/sinwave.rb
index f7e7131..78db32e 100644
--- a/test/sinwave.rb
+++ b/test/sinwave.rb
@@ -1,19 +1,19 @@
-require '../lib/gnuplot'
+require 'gnuplot'
 
 Gnuplot.open do |gp|
   Gnuplot::Plot.new( gp ) do |plot|
-  
+
     plot.xrange "[-10:10]"
     plot.title  "Sin Wave Example"
     plot.ylabel "x"
     plot.xlabel "sin(x)"
-    
+
     plot.data << Gnuplot::DataSet.new( "sin(x)" ) do |ds|
       ds.with = "lines"
       ds.linewidth = 4
     end
-    
+
   end
-  
+
 end
-    
+
diff --git a/test/test_gnuplot.rb b/test/test_gnuplot.rb
index 18d8e34..19b7625 100644
--- a/test/test_gnuplot.rb
+++ b/test/test_gnuplot.rb
@@ -1,9 +1,9 @@
 # -*- ruby -*-
 
-require '../lib/gnuplot'
-require 'test/unit'
+require 'gnuplot'
+require 'minitest/autorun'
 
-class StdDataTest < Test::Unit::TestCase
+class StdDataTest < MiniTest::Test
 
   def test_array_1d
     data = (0..5).to_a
@@ -38,7 +38,7 @@ def test_array_nd
 end
 
 
-class DataSetTest < Test::Unit::TestCase
+class DataSetTest < MiniTest::Test
 
   def test_yield_ctor
     ds = Gnuplot::DataSet.new do |ds|
@@ -58,7 +58,7 @@ def test_yield_ctor
 end
 
 
-class PlotTest < Test::Unit::TestCase
+class PlotTest < MiniTest::Test
 
   def test_no_data
     plot = Gnuplot::Plot.new do |p|
@@ -130,7 +130,7 @@ def test_style
 
 
 require 'rbconfig'
-CONFIG = Config::MAKEFILE_CONFIG
+CONFIG = RbConfig::MAKEFILE_CONFIG
 
 # This attempts to test the functions that comprise the gnuplot package.  Most
 # of the bug reports that I get for this package have to do with finding the

From 8e5d872fdfc14f1f94d9f12a3108211e84b53007 Mon Sep 17 00:00:00 2001
From: Dustin Morrill <morrill@ualberta.ca>
Date: Wed, 9 Jul 2014 13:19:56 -0600
Subject: [PATCH 09/55] Update Rakefile

Removed unnecessary explicit task
---
 Rakefile | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Rakefile b/Rakefile
index a0ac068..bc3514b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -7,9 +7,7 @@ require 'rubygems/package_task'
 require_relative 'lib/ruby_gnuplot/version'
 
 desc 'run unit tests'
-task :default => [:test]
-
-task :build
+task :default => :test
 
 Rake::TestTask.new do |t|
   t.libs << "lib" << 'spec/support'

From 6b9ebad96b35b43aa42bd53e03b48f0fbf14686c Mon Sep 17 00:00:00 2001
From: Dustin Morrill <morrill@ualberta.ca>
Date: Wed, 9 Jul 2014 13:20:31 -0600
Subject: [PATCH 10/55] Update Gemfile

Fixed copy-paste typo
---
 Gemfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Gemfile b/Gemfile
index 1ad452f..3ef8ff9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in acpc_dealer.gemspec
+# Specify your gem's dependencies in ruby_gnuplot.gemspec
 gemspec

From 4c1147fcc5564268650445a9c8bbabb2e86149b8 Mon Sep 17 00:00:00 2001
From: Rakibul Islam <rakib1987@gmail.com>
Date: Sun, 19 Jul 2015 18:08:34 -0400
Subject: [PATCH 11/55] Installation steps and ReadMe Cleanups

* Pre-requisites and Installation steps to use gnuplot gem
* Updated ReadMe for better readability
---
 README.textile | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/README.textile b/README.textile
index 04a0280..9a42805 100644
--- a/README.textile
+++ b/README.textile
@@ -14,6 +14,17 @@ h2.  History and Background
       been using it actively ever since. Now rdp maintains it.
       See also the changelog for more detail.
     
+h2.  Pre-requisites and Installation
+
+      1. Install XQuartz from here: 
+	     @http://xquartz.macosforge.org/landing/@
+	  
+	  2. Install gnuplot with homebrew:
+	     @brew install gnuplot --with-x11@
+	  
+	  3. Install gnuplot gem:
+	     @gem install gnuplot@
+	  
 h2.  Ruby Gnuplot Concepts 
 
       Gnuplot has a very simple conceptual model.  Calls to _Set_ are
@@ -29,11 +40,11 @@ h2.  Ruby Gnuplot Concepts
       plot:
     
     
-#     Instantiate a @Plot@ or @Splot@ object and set parameters by gnuplot variable name. 
+	  1.     Instantiate a @Plot@ or @Splot@ object and set parameters by gnuplot variable name. 
 
-#     Instantiate @DataSet@ objects and attach Ruby objects containing the data to be plotted to the @DataSet@. Attach properties that modify the plot command using the modifier name.
+	  2.     Instantiate @DataSet@ objects and attach Ruby objects containing the data to be plotted to the @DataSet@. Attach properties that modify the plot command using the modifier name.
       
-#     Send the @Plot@/@Splot@ object to a @Gnuplot@ instance for plotting.  
+	  3.     Send the @Plot@/@Splot@ object to a @Gnuplot@ instance for plotting.  
 
       The Version 2.0 interface makes very heavy use of blocks leading to very
       readable code.

From 3d5c2c61afe02223203d1987ed757e18825b9e1d Mon Sep 17 00:00:00 2001
From: Jay Hayes <jay@bignerdranch.com>
Date: Fri, 2 Dec 2016 05:10:23 -0600
Subject: [PATCH 12/55] Fix axis labels in example

---
 README.textile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.textile b/README.textile
index 9a42805..9f43cb9 100644
--- a/README.textile
+++ b/README.textile
@@ -111,8 +111,8 @@ Gnuplot.open do |gp|
   
     plot.xrange "[-10:10]"
     plot.title  "Sin Wave Example"
-    plot.ylabel "x"
-    plot.xlabel "sin(x)"
+    plot.xlabel "x"
+    plot.ylabel "sin(x)"
     
     plot.data << Gnuplot::DataSet.new( "sin(x)" ) do |ds|
       ds.with = "lines"

From d943c06822be71f0c41d107f09f85e938269a639 Mon Sep 17 00:00:00 2001
From: Edward Betts <edward@4angle.com>
Date: Fri, 1 Sep 2017 10:34:39 +0100
Subject: [PATCH 13/55] correct spelling mistake

---
 README.textile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.textile b/README.textile
index 9f43cb9..4ec5086 100644
--- a/README.textile
+++ b/README.textile
@@ -30,7 +30,7 @@ h2.  Ruby Gnuplot Concepts
       Gnuplot has a very simple conceptual model.  Calls to _Set_ are
       made to set parameters and either _Plot_ or _Splot_ is
       called to generate the actual plot.  The _dataset_ to be 
-      plotted can be specified in a number of ways, contained in a seperate
+      plotted can be specified in a number of ways, contained in a separate
       file, generated from a function, read from standard input, or read
       immediately after the plot command.
     

From 21db9771ba37ba9ca29f2259273ef44b1a784b6e Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 25 Oct 2019 18:39:40 +0200
Subject: [PATCH 14/55] Add docker compose and docker file

---
 Dockerfile         | 10 ++++++++++
 docker-compose.yml | 17 +++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 Dockerfile
 create mode 100644 docker-compose.yml

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b547c13
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,10 @@
+FROM ruby:2.5.0 as base
+
+RUN useradd -u 1000 gnuplot; \
+    mkdir -p /home/gnuplot/gnuplot; \
+    chown gnuplot.gnuplot -R /home/gnuplot
+
+WORKDIR /home/gnuplot/gnuplot
+
+USER gnuplot
+RUN gem install bundler
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..a57db23
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,17 @@
+version: '3'
+services:
+  base: &base
+    image: ruby_gnuplot
+    working_dir: /home/gnuplot/gnuplot
+    volumes:
+      - .:/home/gnuplot/gnuplot
+
+  base_build:
+    <<: *base
+    build: .
+    command: echo done
+
+  ruby_gnuplot:
+    <<: *base
+    container_name: ruby_gnuplot
+    depends_on: [base_build]

From 6d8492f1a7a3dc3d8c8d2d1ed067d293f33552c7 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 25 Oct 2019 18:54:22 +0200
Subject: [PATCH 15/55] Install needed packages

---
 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index b547c13..fc14e49 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 FROM ruby:2.5.0 as base
 
+RUN apt-get update && apt-get install -y gnuplot
+
 RUN useradd -u 1000 gnuplot; \
     mkdir -p /home/gnuplot/gnuplot; \
     chown gnuplot.gnuplot -R /home/gnuplot
@@ -7,4 +9,4 @@ RUN useradd -u 1000 gnuplot; \
 WORKDIR /home/gnuplot/gnuplot
 
 USER gnuplot
-RUN gem install bundler
+RUN gem install jeweler2

From 43f5fbf7ed3e6fe00165f2076b069739b90d6cbc Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Mon, 28 Oct 2019 12:27:42 +0100
Subject: [PATCH 16/55] Chnage entrypoint

---
 docker-compose.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docker-compose.yml b/docker-compose.yml
index a57db23..92cfe29 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,3 +15,4 @@ services:
     <<: *base
     container_name: ruby_gnuplot
     depends_on: [base_build]
+    command: /bin/bash

From 39b45e92e314b9c433ba636210e80d07c86fa03c Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Mon, 28 Oct 2019 12:29:51 +0100
Subject: [PATCH 17/55] Simplify docker-compose file

---
 docker-compose.yml | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/docker-compose.yml b/docker-compose.yml
index 92cfe29..61d4e71 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,18 +1,9 @@
 version: '3'
 services:
-  base: &base
-    image: ruby_gnuplot
-    working_dir: /home/gnuplot/gnuplot
-    volumes:
-      - .:/home/gnuplot/gnuplot
-
-  base_build:
-    <<: *base
-    build: .
-    command: echo done
-
   ruby_gnuplot:
-    <<: *base
+    build: .
+    working_dir: /home/gnuplot/gnuplot
     container_name: ruby_gnuplot
-    depends_on: [base_build]
     command: /bin/bash
+    volumes:
+      - .:/home/gnuplot/gnuplot

From e7b7c648fc262b54d2d8c0cbabf1d2a23002d911 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 20:15:32 +0100
Subject: [PATCH 18/55] Update dockerfile acording to new bundle format

---
 Dockerfile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index fc14e49..b6d5643 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,4 +9,7 @@ RUN useradd -u 1000 gnuplot; \
 WORKDIR /home/gnuplot/gnuplot
 
 USER gnuplot
-RUN gem install jeweler2
+
+COPY ./ ./
+
+RUN gem install bundler; bundle install

From 3e2d95b5ad1df794c703fe3e0b4ea8aad75e5462 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 21:16:44 +0100
Subject: [PATCH 19/55] Add gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b844b14
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+Gemfile.lock

From 7b23f81eacef4a15b7fd4affffa565484db58c34 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:21:24 +0100
Subject: [PATCH 20/55] Avoid Gnuplot.lock copy

---
 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index b6d5643..8123674 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,8 @@ WORKDIR /home/gnuplot/gnuplot
 
 USER gnuplot
 
-COPY ./ ./
+COPY lib/ ./lib/
+COPY *.gemspec ./
+COPY Gemfile ./
 
 RUN gem install bundler; bundle install

From 7cd0b4cc670ea66a6e8497c99f409915790f81db Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 21:13:33 +0100
Subject: [PATCH 21/55] Add rspec

---
 ruby_gnuplot.gemspec | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ruby_gnuplot.gemspec b/ruby_gnuplot.gemspec
index c9cf609..c0fcedc 100644
--- a/ruby_gnuplot.gemspec
+++ b/ruby_gnuplot.gemspec
@@ -18,4 +18,5 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_development_dependency 'minitest'
+  s.add_development_dependency 'rspec', '3.9.0'
 end

From 5024cdd840e33afaee5e2ff02c8fee5a7531bc82 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 21:14:51 +0100
Subject: [PATCH 22/55] add rspec

---
 .rspec              |   2 +
 spec/spec_helper.rb | 100 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 .rspec
 create mode 100644 spec/spec_helper.rb

diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..3687797
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,2 @@
+--require spec_helper
+--color
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..251aa51
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,100 @@
+# This file was generated by the `rspec --init` command. Conventionally, all
+# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
+# The generated `.rspec` file contains `--require spec_helper` which will cause
+# this file to always be loaded, without a need to explicitly require it in any
+# files.
+#
+# Given that it is always loaded, you are encouraged to keep this file as
+# light-weight as possible. Requiring heavyweight dependencies from this file
+# will add to the boot time of your test suite on EVERY test run, even for an
+# individual file that may not need all of that loaded. Instead, consider making
+# a separate helper file that requires the additional dependencies and performs
+# the additional setup, and require it from the spec files that actually need
+# it.
+#
+# See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+RSpec.configure do |config|
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # This option will default to `true` in RSpec 4. It makes the `description`
+    # and `failure_message` of custom matchers include text for helper methods
+    # defined using `chain`, e.g.:
+    #     be_bigger_than(2).and_smaller_than(4).description
+    #     # => "be bigger than 2 and smaller than 4"
+    # ...rather than:
+    #     # => "be bigger than 2"
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended, and will default to
+    # `true` in RSpec 4.
+    mocks.verify_partial_doubles = true
+  end
+
+  # This option will default to `:apply_to_host_groups` in RSpec 4 (and will
+  # have no way to turn it off -- the option exists only for backwards
+  # compatibility in RSpec 3). It causes shared context metadata to be
+  # inherited by the metadata hash of host groups and examples, rather than
+  # triggering implicit auto-inclusion in groups with matching metadata.
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+
+# The settings below are suggested to provide a good initial experience
+# with RSpec, but feel free to customize to your heart's content.
+=begin
+  # This allows you to limit a spec run to individual examples or groups
+  # you care about by tagging them with `:focus` metadata. When nothing
+  # is tagged with `:focus`, all examples get run. RSpec also provides
+  # aliases for `it`, `describe`, and `context` that include `:focus`
+  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  config.filter_run_when_matching :focus
+
+  # Allows RSpec to persist some state between runs in order to support
+  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  # you configure your source control system to ignore this file.
+  config.example_status_persistence_file_path = "spec/examples.txt"
+
+  # Limits the available syntax to the non-monkey patched syntax that is
+  # recommended. For more details, see:
+  #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
+  #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+  #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
+  config.disable_monkey_patching!
+
+  # This setting enables warnings. It's recommended, but in some cases may
+  # be too noisy due to issues in dependencies.
+  config.warnings = true
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = "doc"
+  end
+
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = :random
+
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+=end
+end

From 8e42b9082f8a709031e9e80b7c4e682c544ea158 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:04:00 +0100
Subject: [PATCH 23/55] Add arrtest_spec

---
 spec/integration/arrtest_spec.rb | 39 ++++++++++++++++++++++++++++++++
 spec/spec_helper.rb              |  2 ++
 spec/tmp/.keep                   |  0
 3 files changed, 41 insertions(+)
 create mode 100644 spec/integration/arrtest_spec.rb
 create mode 100644 spec/tmp/.keep

diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
new file mode 100644
index 0000000..f0e3bbf
--- /dev/null
+++ b/spec/integration/arrtest_spec.rb
@@ -0,0 +1,39 @@
+describe "Array Plot Example" do
+  let(:file_path)    { 'spec/tmp/array_plot.eps' }
+  let(:fixture_path) { 'spec/fixtures/plots/array_plot.eps' }
+
+  let(:file_content)    { File.read(file_path) }
+  let(:fixture_content) { File.read(fixture_path) }
+
+  before do
+    path = file_path
+
+    Gnuplot.open do |gp|
+      Gnuplot::Plot.new( gp ) do |plot|
+
+        plot.title  "Array Plot Example"
+        plot.ylabel "x"
+        plot.xlabel "x^2"
+        plot.set "term","postscript eps"
+        plot.set "out", "'#{path}'"
+
+        x = (0..50).collect { |v| v.to_f }
+        y = x.collect { |v| v ** 2 }
+
+        plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
+          ds.with = "linespoints"
+          ds.notitle
+        end
+      end
+    end
+
+  end
+
+  after do
+    File.delete(file_path)
+  end
+
+  it do
+    expect(file_content).to eq(fixture_content)
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 251aa51..8e96672 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,6 +13,8 @@
 # it.
 #
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+require "gnuplot"
+
 RSpec.configure do |config|
   # rspec-expectations config goes here. You can use an alternate
   # assertion/expectation library such as wrong or the stdlib/minitest
diff --git a/spec/tmp/.keep b/spec/tmp/.keep
new file mode 100644
index 0000000..e69de29

From b6742ae88ea71a8321890ab912528c5b306207f1 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:28:45 +0100
Subject: [PATCH 24/55] Add sample example for arr_spec

---
 spec/fixtures/plots/array_plot.eps | 810 +++++++++++++++++++++++++++++
 spec/integration/arrtest_spec.rb   |   9 +-
 2 files changed, 817 insertions(+), 2 deletions(-)
 create mode 100644 spec/fixtures/plots/array_plot.eps

diff --git a/spec/fixtures/plots/array_plot.eps b/spec/fixtures/plots/array_plot.eps
new file mode 100644
index 0000000..98b8de1
--- /dev/null
+++ b/spec/fixtures/plots/array_plot.eps
@@ -0,0 +1,810 @@
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+} ifelse
+%
+% Support for boxed text - Ethan A Merritt May 2005
+%
+/InitTextBox { userdict /TBy2 3 -1 roll put userdict /TBx2 3 -1 roll put
+           userdict /TBy1 3 -1 roll put userdict /TBx1 3 -1 roll put
+	   /Boxing true def } def
+/ExtendTextBox { Boxing
+    { gsave dup false charpath pathbbox
+      dup TBy2 gt {userdict /TBy2 3 -1 roll put} {pop} ifelse
+      dup TBx2 gt {userdict /TBx2 3 -1 roll put} {pop} ifelse
+      dup TBy1 lt {userdict /TBy1 3 -1 roll put} {pop} ifelse
+      dup TBx1 lt {userdict /TBx1 3 -1 roll put} {pop} ifelse
+      grestore } if } def
+/PopTextBox { newpath TBx1 TBxmargin sub TBy1 TBymargin sub M
+               TBx1 TBxmargin sub TBy2 TBymargin add L
+	       TBx2 TBxmargin add TBy2 TBymargin add L
+	       TBx2 TBxmargin add TBy1 TBymargin sub L closepath } def
+/DrawTextBox { PopTextBox stroke /Boxing false def} def
+/FillTextBox { gsave PopTextBox 1 1 1 setrgbcolor fill grestore /Boxing false def} def
+0 0 0 0 InitTextBox
+/TBxmargin 20 def
+/TBymargin 20 def
+/Boxing false def
+/textshow { ExtendTextBox Gshow } def
+%
+% redundant definitions for compatibility with prologue.ps older than 5.0.2
+/LTB {BL [] LCb DL} def
+/LTb {PL [] LCb DL} def
+end
+%%EndProlog
+%%Page: 1 1
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+] -46.7 MCshow
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+] -46.7 MCshow
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+] -60.7 MCshow
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+[ [(Helvetica) 140.0 0.0 true true 0 (Array Plot Example)]
+] -46.7 MCshow
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+showpage
+%%Trailer
+%%DocumentFonts: Helvetica
diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
index f0e3bbf..9af5de0 100644
--- a/spec/integration/arrtest_spec.rb
+++ b/spec/integration/arrtest_spec.rb
@@ -2,8 +2,13 @@
   let(:file_path)    { 'spec/tmp/array_plot.eps' }
   let(:fixture_path) { 'spec/fixtures/plots/array_plot.eps' }
 
-  let(:file_content)    { File.read(file_path) }
-  let(:fixture_content) { File.read(fixture_path) }
+  let(:file_content) do
+    File.read(file_path).gsub(/CreationDate.*/, "")
+  end
+
+  let(:fixture_content) do
+    File.read(fixture_path).gsub(/CreationDate.*/, "")
+  end
 
   before do
     path = file_path

From b97fb8c423e2afb3068b79e64833ec525c5b4491 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:29:05 +0100
Subject: [PATCH 25/55] Ignore swap files

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index b844b14..e82255f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 Gemfile.lock
+**/*.swp

From 1c72ea5810db9ed47e77c2ccf8132474d5921404 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:29:37 +0100
Subject: [PATCH 26/55] Add expectation description

---
 spec/integration/arrtest_spec.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
index 9af5de0..592a50e 100644
--- a/spec/integration/arrtest_spec.rb
+++ b/spec/integration/arrtest_spec.rb
@@ -38,7 +38,7 @@
     File.delete(file_path)
   end
 
-  it do
+  it "plots expected file" do
     expect(file_content).to eq(fixture_content)
   end
 end

From 2b577b1aaf8f0b46aff09d8cbd0b20ffcf420055 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:44:37 +0100
Subject: [PATCH 27/55] Add simple plot spec proposal

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 32 ++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 spec/lib/ruby_gnuplot/plot_spec.rb

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
new file mode 100644
index 0000000..3a53e43
--- /dev/null
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -0,0 +1,32 @@
+describe Gnuplot::Plot do
+  subject(:plot) { described_class.new }
+
+  describe '#to_gplot' do
+    context 'when nothing has been set' do
+      it "returns an empty string" do
+        expect(plot.to_gplot).to eq('')
+      end
+    end
+
+    context 'when titles and labels have been set' do
+      let(:expected_string) do
+        [
+          'set title "Array Plot Example"',
+          'set ylabel "x"',
+          'set xlabel "x^2"',
+          ''
+        ].join("\n")
+      end
+
+      before do
+        plot.title  "Array Plot Example"
+        plot.ylabel "x"
+        plot.xlabel "x^2"
+      end
+
+      it "sets title and axis labels" do
+        expect(plot.to_gplot).to eq(expected_string)
+      end
+    end
+  end
+end

From f550805b7af3ac556a8721a6a834b2f98404ca47 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:55:12 +0100
Subject: [PATCH 28/55] Improove gplot spec

---
 spec/integration/arrtest_spec.rb   |  4 +--
 spec/lib/ruby_gnuplot/plot_spec.rb | 39 ++++++++++++++++++++++--------
 2 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
index 592a50e..e496bab 100644
--- a/spec/integration/arrtest_spec.rb
+++ b/spec/integration/arrtest_spec.rb
@@ -19,8 +19,8 @@
         plot.title  "Array Plot Example"
         plot.ylabel "x"
         plot.xlabel "x^2"
-        plot.set "term","postscript eps"
-        plot.set "out", "'#{path}'"
+        plot.set    "term","postscript eps"
+        plot.set    "out", "'#{path}'"
 
         x = (0..50).collect { |v| v.to_f }
         y = x.collect { |v| v ** 2 }
diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 3a53e43..c45ce23 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -2,6 +2,18 @@
   subject(:plot) { described_class.new }
 
   describe '#to_gplot' do
+    let(:expected_string) do
+      [
+        'set title "Array Plot Example"',
+        'set ylabel "x"',
+        'set xlabel "x^2"',
+        'set term postscript eps',
+        'set output "file.eps"',
+        ''
+      ].join("\n")
+    end
+
+
     context 'when nothing has been set' do
       it "returns an empty string" do
         expect(plot.to_gplot).to eq('')
@@ -9,22 +21,29 @@
     end
 
     context 'when titles and labels have been set' do
-      let(:expected_string) do
-        [
-          'set title "Array Plot Example"',
-          'set ylabel "x"',
-          'set xlabel "x^2"',
-          ''
-        ].join("\n")
-      end
-
       before do
         plot.title  "Array Plot Example"
         plot.ylabel "x"
         plot.xlabel "x^2"
+        plot.term   "postscript eps"
+        plot.output "file.eps"
+      end
+
+      it "wraps strings with quotes when needed" do
+        expect(plot.to_gplot).to eq(expected_string)
+      end
+    end
+
+    context 'when variables are set throgh set call' do
+      before do
+        plot.set "title",  "Array Plot Example"
+        plot.set "ylabel", "x"
+        plot.set "xlabel", "x^2"
+        plot.set "term",   "postscript eps"
+        plot.set "output", "file.eps"
       end
 
-      it "sets title and axis labels" do
+      it "wraps strings with quotes when needed" do
         expect(plot.to_gplot).to eq(expected_string)
       end
     end

From 64fc5de32320f81044b0771ba49d03df709a36dd Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 22:58:14 +0100
Subject: [PATCH 29/55] Use correct format

---
 spec/integration/arrtest_spec.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
index e496bab..a5ae38e 100644
--- a/spec/integration/arrtest_spec.rb
+++ b/spec/integration/arrtest_spec.rb
@@ -19,8 +19,8 @@
         plot.title  "Array Plot Example"
         plot.ylabel "x"
         plot.xlabel "x^2"
-        plot.set    "term","postscript eps"
-        plot.set    "out", "'#{path}'"
+        plot.term   "postscript eps"
+        plot.output path
 
         x = (0..50).collect { |v| v.to_f }
         y = x.collect { |v| v ** 2 }

From 17290ecd36b996605e12e259c791685f657ff7f4 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 23:02:24 +0100
Subject: [PATCH 30/55] Add simplecov

---
 ruby_gnuplot.gemspec | 3 ++-
 spec/spec_helper.rb  | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ruby_gnuplot.gemspec b/ruby_gnuplot.gemspec
index c0fcedc..c070c96 100644
--- a/ruby_gnuplot.gemspec
+++ b/ruby_gnuplot.gemspec
@@ -18,5 +18,6 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_development_dependency 'minitest'
-  s.add_development_dependency 'rspec', '3.9.0'
+  s.add_development_dependency 'rspec',     '3.9.0'
+  s.add_development_dependency 'simplecov', '0.17.0'
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 8e96672..051338c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,6 +13,11 @@
 # it.
 #
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+require 'simplecov'
+SimpleCov.start do
+  add_filter '/spec/'
+end
+
 require "gnuplot"
 
 RSpec.configure do |config|

From 97e2b8cfb7e2763b6150643cc3cbd31808795f33 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 6 Nov 2019 23:02:43 +0100
Subject: [PATCH 31/55] Add coverage to ignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index e82255f..97c645a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 Gemfile.lock
 **/*.swp
+coverage/

From 7c6ebdf2f44f6abbb7f96a39b88e0f7bc0fc286f Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 22:15:17 +0100
Subject: [PATCH 32/55] Replace whitespaces

---
 test/histtest.rb | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/test/histtest.rb b/test/histtest.rb
index d90bc0d..9207005 100644
--- a/test/histtest.rb
+++ b/test/histtest.rb
@@ -1,20 +1,20 @@
 require 'gnuplot'
 
 Gnuplot.open do |gp|
-    gp << "bin(x, s) = s*int(x/s)\n"
+  gp << "bin(x, s) = s*int(x/s)\n"
 
-    Gnuplot::Plot.new( gp ) do |plot|
-	plot.title  "Histogram"
-	plot.xlabel "x"
-	plot.ylabel "frequency"
+  Gnuplot::Plot.new( gp ) do |plot|
+    plot.title  "Histogram"
+    plot.xlabel "x"
+    plot.ylabel "frequency"
 
-	x = (0..500).collect { |v| (rand()-0.5)**3 }
-	plot.data << Gnuplot::DataSet.new( [x] ) do |ds|
-	    ds.title = "smooth frequency"
-	    ds.using = "(bin($1,.01)):(1.)"
-	    ds.smooth = "freq"
-	    ds.with = "boxes"
-	end
+    x = (0..500).collect { |v| (rand()-0.5)**3 }
+    plot.data << Gnuplot::DataSet.new( [x] ) do |ds|
+      ds.title = "smooth frequency"
+      ds.using = "(bin($1,.01)):(1.)"
+      ds.smooth = "freq"
+      ds.with = "boxes"
     end
+  end
 end
 

From 82c4eb816ecfd48ebc77275db76ebe99f0720c45 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 22:40:24 +0100
Subject: [PATCH 33/55] Add histogram spec

---
 spec/integration/histtest_spec.rb | 48 +++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 spec/integration/histtest_spec.rb

diff --git a/spec/integration/histtest_spec.rb b/spec/integration/histtest_spec.rb
new file mode 100644
index 0000000..47d7aea
--- /dev/null
+++ b/spec/integration/histtest_spec.rb
@@ -0,0 +1,48 @@
+describe "Histogram Plot Example" do
+  let(:file_path)    { 'spec/tmp/histogram_plot.eps' }
+  let(:fixture_path) { 'spec/fixtures/plots/histogram_plot.eps' }
+
+  let(:file_content) do
+    File.read(file_path).gsub(/CreationDate.*/, "")
+  end
+
+  let(:fixture_content) do
+    File.read(fixture_path).gsub(/CreationDate.*/, "")
+  end
+
+  before do
+    path = file_path
+    collection = (0..500).collect do |_v|
+      (rand()-0.5)**3
+    end
+
+    Gnuplot.open do |gp|
+      gp << "bin(x, s) = s*int(x/s)\n"
+
+      Gnuplot::Plot.new( gp ) do |plot|
+        plot.title  "Histogram"
+        plot.xlabel "x"
+        plot.ylabel "frequency"
+
+        plot.data << Gnuplot::DataSet.new( [collection] ) do |ds|
+          ds.title = "smooth frequency"
+          ds.using = "(bin($1,.01)):(1.)"
+          ds.smooth = "freq"
+          ds.with = "boxes"
+        end
+
+        plot.term   "postscript eps"
+        plot.output path
+      end
+    end
+
+  end
+
+  after do
+    File.delete(file_path)
+  end
+
+  it "plots expected file" do
+    expect(file_content).to eq(fixture_content)
+  end
+end

From 9037db89e6f556b7d6a81c12e5b9aed2e7fe8630 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 23:12:26 +0100
Subject: [PATCH 34/55] Fix histogram spec

---
 spec/fixtures/plots/histogram_plot.eps  | 889 ++++++++++++++++++++++++
 spec/integration/histtest_spec.rb       |   4 +-
 spec/spec_helper.rb                     |   4 +
 spec/support/models/random_generator.rb |  18 +
 4 files changed, 914 insertions(+), 1 deletion(-)
 create mode 100644 spec/fixtures/plots/histogram_plot.eps
 create mode 100644 spec/support/models/random_generator.rb

diff --git a/spec/fixtures/plots/histogram_plot.eps b/spec/fixtures/plots/histogram_plot.eps
new file mode 100644
index 0000000..c2edc90
--- /dev/null
+++ b/spec/fixtures/plots/histogram_plot.eps
@@ -0,0 +1,889 @@
+%!PS-Adobe-2.0 EPSF-2.0
+%%Title: spec/tmp/histogram_plot.eps
+%%Creator: gnuplot 5.0 patchlevel 5
+%%CreationDate: Fri Nov 22 22:11:02 2019
+%%DocumentFonts: (atend)
+%%BoundingBox: 50 50 410 302
+%%EndComments
+%%BeginProlog
+/gnudict 256 dict def
+gnudict begin
+%
+% The following true/false flags may be edited by hand if desired.
+% The unit line width and grayscale image gamma correction may also be changed.
+%
+/Color false def
+/Blacktext false def
+/Solid false def
+/Dashlength 1 def
+/Landscape false def
+/Level1 false def
+/Level3 false def
+/Rounded false def
+/ClipToBoundingBox false def
+/SuppressPDFMark false def
+/TransparentPatterns false def
+/gnulinewidth 5.000 def
+/userlinewidth gnulinewidth def
+/Gamma 1.0 def
+/BackgroundColor {-1.000 -1.000 -1.000} def
+%
+/vshift -46 def
+/dl1 {
+  10.0 Dashlength userlinewidth gnulinewidth div mul mul mul
+  Rounded { currentlinewidth 0.75 mul sub dup 0 le { pop 0.01 } if } if
+} def
+/dl2 {
+  10.0 Dashlength userlinewidth gnulinewidth div mul mul mul
+  Rounded { currentlinewidth 0.75 mul add } if
+} def
+/hpt_ 31.5 def
+/vpt_ 31.5 def
+/hpt hpt_ def
+/vpt vpt_ def
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diff --git a/spec/integration/histtest_spec.rb b/spec/integration/histtest_spec.rb
index 47d7aea..2dda5f3 100644
--- a/spec/integration/histtest_spec.rb
+++ b/spec/integration/histtest_spec.rb
@@ -12,8 +12,10 @@
 
   before do
     path = file_path
+    RandomGenerator.seed(0.17)
+
     collection = (0..500).collect do |_v|
-      (rand()-0.5)**3
+      (RandomGenerator.rand-0.5)**3
     end
 
     Gnuplot.open do |gp|
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 051338c..38530b9 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -20,6 +20,10 @@
 
 require "gnuplot"
 
+support_files = File.expand_path('spec/support/**/*.rb')
+
+Dir[support_files].sort.each { |file| require file }
+
 RSpec.configure do |config|
   # rspec-expectations config goes here. You can use an alternate
   # assertion/expectation library such as wrong or the stdlib/minitest
diff --git a/spec/support/models/random_generator.rb b/spec/support/models/random_generator.rb
new file mode 100644
index 0000000..96e752e
--- /dev/null
+++ b/spec/support/models/random_generator.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class RandomGenerator
+  KAPA = 3.95578
+
+  class << self
+    def rand
+      @rand ||= Random.rand
+
+      @rand = KAPA * @rand * (1 - @rand)
+    end
+
+    def seed(value)
+      @rand = value.abs % 1
+      @rand = nil if @rand == 0
+    end
+  end
+end

From 093b6bdee6dc62eef8b345faa2be03d8e5b83354 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 23:19:25 +0100
Subject: [PATCH 35/55] Add sin wave spec

---
 spec/fixtures/plots/sin_wave_plot.eps | 857 ++++++++++++++++++++++++++
 spec/integration/histtest_spec.rb     |   2 +-
 spec/integration/multtest_spec.rb     |  57 ++
 test/multtest.rb                      |  10 +-
 4 files changed, 920 insertions(+), 6 deletions(-)
 create mode 100644 spec/fixtures/plots/sin_wave_plot.eps
 create mode 100644 spec/integration/multtest_spec.rb

diff --git a/spec/fixtures/plots/sin_wave_plot.eps b/spec/fixtures/plots/sin_wave_plot.eps
new file mode 100644
index 0000000..4dea1f4
--- /dev/null
+++ b/spec/fixtures/plots/sin_wave_plot.eps
@@ -0,0 +1,857 @@
+%!PS-Adobe-2.0 EPSF-2.0
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diff --git a/spec/integration/histtest_spec.rb b/spec/integration/histtest_spec.rb
index 2dda5f3..3cc98fa 100644
--- a/spec/integration/histtest_spec.rb
+++ b/spec/integration/histtest_spec.rb
@@ -14,7 +14,7 @@
     path = file_path
     RandomGenerator.seed(0.17)
 
-    collection = (0..500).collect do |_v|
+    collection = (0..500).collect do
       (RandomGenerator.rand-0.5)**3
     end
 
diff --git a/spec/integration/multtest_spec.rb b/spec/integration/multtest_spec.rb
new file mode 100644
index 0000000..41d27d0
--- /dev/null
+++ b/spec/integration/multtest_spec.rb
@@ -0,0 +1,57 @@
+describe "Sin Wave Plot Example" do
+  let(:file_path)    { 'spec/tmp/sin_wave_plot.eps' }
+  let(:fixture_path) { 'spec/fixtures/plots/sin_wave_plot.eps' }
+
+  let(:file_content) do
+    File.read(file_path).gsub(/CreationDate.*/, "")
+  end
+
+  let(:fixture_content) do
+    File.read(fixture_path).gsub(/CreationDate.*/, "")
+  end
+
+  before do
+    path = file_path
+
+    Gnuplot.open do |gp|
+      Gnuplot::Plot.new( gp ) do |plot|
+
+        plot.xrange "[-10:10]"
+        plot.title  "Sin Wave Example"
+        plot.ylabel "x"
+        plot.xlabel "sin(x)"
+
+        plot.term   "postscript eps"
+        plot.output path
+
+        x = (0..50).collect { |v| v.to_f }
+        y = x.collect { |v| v ** 2 }
+
+        plot.data = [
+          Gnuplot::DataSet.new( "sin(x)" ) { |ds|
+            ds.with = "lines"
+            ds.title = "String function"
+            ds.linewidth = 4
+          },
+
+          Gnuplot::DataSet.new( [x, y] ) { |ds|
+            ds.with = "linespoints"
+            ds.title = "Array data"
+          }
+        ]
+
+      end
+
+    end
+
+  end
+
+  after do
+    File.delete(file_path)
+  end
+
+  it "plots expected file" do
+    expect(file_content).to eq(fixture_content)
+  end
+end
+
diff --git a/test/multtest.rb b/test/multtest.rb
index 3bf4983..dcd06c1 100644
--- a/test/multtest.rb
+++ b/test/multtest.rb
@@ -14,14 +14,14 @@
 
     plot.data = [
       Gnuplot::DataSet.new( "sin(x)" ) { |ds|
-	ds.with = "lines"
-	ds.title = "String function"
-	ds.linewidth = 4
+        ds.with = "lines"
+        ds.title = "String function"
+        ds.linewidth = 4
       },
 
       Gnuplot::DataSet.new( [x, y] ) { |ds|
-	ds.with = "linespoints"
-	ds.title = "Array data"
+        ds.with = "linespoints"
+        ds.title = "Array data"
       }
     ]
 

From 15e80d890f08e9b7d78321657528af5a4ccacfc6 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 23:28:26 +0100
Subject: [PATCH 36/55] Rename test

---
 .../plots/{sin_wave_plot.eps => multtest_plot.eps}        | 8 ++++----
 spec/integration/multtest_spec.rb                         | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)
 rename spec/fixtures/plots/{sin_wave_plot.eps => multtest_plot.eps} (99%)

diff --git a/spec/fixtures/plots/sin_wave_plot.eps b/spec/fixtures/plots/multtest_plot.eps
similarity index 99%
rename from spec/fixtures/plots/sin_wave_plot.eps
rename to spec/fixtures/plots/multtest_plot.eps
index 4dea1f4..7575c79 100644
--- a/spec/fixtures/plots/sin_wave_plot.eps
+++ b/spec/fixtures/plots/multtest_plot.eps
@@ -1,7 +1,7 @@
 %!PS-Adobe-2.0 EPSF-2.0
-%%Title: spec/tmp/sin_wave_plot.eps
+%%Title: spec/tmp/multtest_plot.eps
 %%Creator: gnuplot 5.0 patchlevel 5
-%%CreationDate: Fri Nov 22 22:17:59 2019
+%%CreationDate: Fri Nov 22 22:28:48 2019
 %%DocumentFonts: (atend)
 %%BoundingBox: 50 50 410 302
 %%EndComments
@@ -464,12 +464,12 @@ systemdict /pdfmark known not {
   userdict /pdfmark systemdict /cleartomark get put
 } if
 SDict begin [
-  /Title (spec/tmp/sin_wave_plot.eps)
+  /Title (spec/tmp/multtest_plot.eps)
   /Subject (gnuplot plot)
   /Creator (gnuplot 5.0 patchlevel 5)
 %  /Producer (gnuplot)
 %  /Keywords ()
-  /CreationDate (Fri Nov 22 22:17:59 2019)
+  /CreationDate (Fri Nov 22 22:28:48 2019)
   /DOCINFO pdfmark
 end
 } ifelse
diff --git a/spec/integration/multtest_spec.rb b/spec/integration/multtest_spec.rb
index 41d27d0..31c5923 100644
--- a/spec/integration/multtest_spec.rb
+++ b/spec/integration/multtest_spec.rb
@@ -1,6 +1,6 @@
-describe "Sin Wave Plot Example" do
-  let(:file_path)    { 'spec/tmp/sin_wave_plot.eps' }
-  let(:fixture_path) { 'spec/fixtures/plots/sin_wave_plot.eps' }
+describe "Multtest Plot Example" do
+  let(:file_path)    { 'spec/tmp/multtest_plot.eps' }
+  let(:fixture_path) { 'spec/fixtures/plots/multtest_plot.eps' }
 
   let(:file_content) do
     File.read(file_path).gsub(/CreationDate.*/, "")
@@ -47,7 +47,7 @@
   end
 
   after do
-    File.delete(file_path)
+   File.delete(file_path)
   end
 
   it "plots expected file" do

From 53369f7669c702ea9913614ad8144ac541828fbf Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Fri, 22 Nov 2019 23:31:22 +0100
Subject: [PATCH 37/55] Add sinwave spec

---
 spec/fixtures/plots/sin_wave_plot.eps | 862 ++++++++++++++++++++++++++
 spec/integration/sinwave_spec.rb      |  46 ++
 2 files changed, 908 insertions(+)
 create mode 100644 spec/fixtures/plots/sin_wave_plot.eps
 create mode 100644 spec/integration/sinwave_spec.rb

diff --git a/spec/fixtures/plots/sin_wave_plot.eps b/spec/fixtures/plots/sin_wave_plot.eps
new file mode 100644
index 0000000..f30514a
--- /dev/null
+++ b/spec/fixtures/plots/sin_wave_plot.eps
@@ -0,0 +1,862 @@
+%!PS-Adobe-2.0 EPSF-2.0
+%%Title: spec/tmp/sin_wave_plot.eps
+%%Creator: gnuplot 5.0 patchlevel 5
+%%CreationDate: Fri Nov 22 22:30:52 2019
+%%DocumentFonts: (atend)
+%%BoundingBox: 50 50 410 302
+%%EndComments
+%%BeginProlog
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+LTb
+LCb setrgbcolor
+/Helvetica findfont 140 scalefont setfont
+LCb setrgbcolor
+6296 4486 M
+(sin\(x\)) Rshow
+4.000 UL
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+LCb setrgbcolor
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+63 -255 V
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+63 -366 V
+64 -400 V
+63 -418 V
+63 -419 V
+63 -403 V
+63 -370 V
+64 -322 V
+63 -262 V
+63 -191 V
+63 -111 V
+64 -28 V
+63 57 V
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+LCb setrgbcolor
+stroke
+grestore
+end
+showpage
+%%Trailer
+%%DocumentFonts: Helvetica
diff --git a/spec/integration/sinwave_spec.rb b/spec/integration/sinwave_spec.rb
new file mode 100644
index 0000000..821502c
--- /dev/null
+++ b/spec/integration/sinwave_spec.rb
@@ -0,0 +1,46 @@
+describe "Sin Wave Plot Example" do
+  let(:file_path)    { 'spec/tmp/sin_wave_plot.eps' }
+  let(:fixture_path) { 'spec/fixtures/plots/sin_wave_plot.eps' }
+
+  let(:file_content) do
+    File.read(file_path).gsub(/CreationDate.*/, "")
+  end
+
+  let(:fixture_content) do
+    File.read(fixture_path).gsub(/CreationDate.*/, "")
+  end
+
+  before do
+    path = file_path
+
+    Gnuplot.open do |gp|
+      Gnuplot::Plot.new( gp ) do |plot|
+
+        plot.xrange "[-10:10]"
+        plot.title  "Sin Wave Example"
+        plot.ylabel "x"
+        plot.xlabel "sin(x)"
+
+        plot.term   "postscript eps"
+        plot.output path
+
+        plot.data << Gnuplot::DataSet.new( "sin(x)" ) do |ds|
+          ds.with = "lines"
+          ds.linewidth = 4
+        end
+
+      end
+
+    end
+
+  end
+
+  after do
+    File.delete(file_path)
+  end
+
+  it "plots expected file" do
+    expect(file_content).to eq(fixture_content)
+  end
+end
+

From 67245c701d6100da60d54a1bf9f48bd682ccc049 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Sun, 24 Nov 2019 10:21:41 +0100
Subject: [PATCH 38/55] Add initialization spec

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index c45ce23..b831ef5 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -47,5 +47,21 @@
         expect(plot.to_gplot).to eq(expected_string)
       end
     end
+
+    context "when setting from inside initialization" do
+      subject(:plot) do
+        described_class.new do |p|
+          p.title  "Array Plot Example"
+          p.ylabel "x"
+          p.xlabel "x^2"
+          p.term   "postscript eps"
+          p.output "file.eps"
+        end
+      end
+
+      it "wraps strings with quotes when needed" do
+        expect(plot.to_gplot).to eq(expected_string)
+      end
+    end
   end
 end

From 6cd22ae7c4aa28410fc93004f1906af6360b7143 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Sun, 24 Nov 2019 10:32:48 +0100
Subject: [PATCH 39/55] Add quotting sets spec

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index b831ef5..a69a1ee 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -1,3 +1,15 @@
+shared_examples 'quotes value when setting in a plot for' do |field|
+  describe "##{field}" do
+    before do
+      plot.public_send(field, 'text')
+    end
+
+    it 'quotes value when setting it' do
+      expect(plot.to_gplot).to eq("set #{field} \"text\"\n")
+    end
+  end
+end
+
 describe Gnuplot::Plot do
   subject(:plot) { described_class.new }
 
@@ -64,4 +76,14 @@
       end
     end
   end
+
+  it_behaves_like 'quotes value when setting in a plot for', :title
+  it_behaves_like 'quotes value when setting in a plot for', :output
+  it_behaves_like 'quotes value when setting in a plot for', :xlabel
+  it_behaves_like 'quotes value when setting in a plot for', :x2label
+  it_behaves_like 'quotes value when setting in a plot for', :ylabel
+  it_behaves_like 'quotes value when setting in a plot for', :y2label
+  it_behaves_like 'quotes value when setting in a plot for', :clabel
+  it_behaves_like 'quotes value when setting in a plot for', :cblabel
+  it_behaves_like 'quotes value when setting in a plot for', :zlabel
 end

From 9ee1f5bb79312c0725847a7b518d9e92322a6cce Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Sun, 24 Nov 2019 10:38:58 +0100
Subject: [PATCH 40/55] Placeholder for style spec

---
 spec/lib/ruby_gnuplot/style_spec.rb | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 spec/lib/ruby_gnuplot/style_spec.rb

diff --git a/spec/lib/ruby_gnuplot/style_spec.rb b/spec/lib/ruby_gnuplot/style_spec.rb
new file mode 100644
index 0000000..8383fb8
--- /dev/null
+++ b/spec/lib/ruby_gnuplot/style_spec.rb
@@ -0,0 +1,5 @@
+describe Gnuplot::Plot do
+  subject(:style) { described_class.new }
+
+  xit "Adds tests here"
+end

From 4e023d68f481830ed93dc3652eb6f2c30b19d00a Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Sun, 24 Nov 2019 13:03:03 +0100
Subject: [PATCH 41/55] Add Plot#[] spec

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 55 ++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index a69a1ee..e0ca332 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -86,4 +86,59 @@
   it_behaves_like 'quotes value when setting in a plot for', :clabel
   it_behaves_like 'quotes value when setting in a plot for', :cblabel
   it_behaves_like 'quotes value when setting in a plot for', :zlabel
+
+  describe '[]' do
+    context 'when value was never set' do
+      it { expect(plot['key']).to be_nil }
+    end
+
+    context 'when value was only unset' do
+      before { plot.unset 'title' }
+
+      it { expect(plot['title']).to be_nil }
+    end
+
+    context 'when value was set only once' do
+      before { plot.title "My Title" }
+
+      it "returns the value to be used (quoted when needed)" do
+        expect(plot['title']).to eq('"My Title"')
+      end
+    end
+
+    context 'when value was set twice' do
+      before do
+        plot.title "My Title"
+        plot.title "My New Title"
+      end
+
+      # TODO: check specification
+      xit "returns the last value set" do
+        expect(plot['title']).to eq('"My New Title"')
+      end
+    end
+
+    context 'when value was set then unset' do
+      before do
+        plot.title "My Title"
+        plot.unset "title"
+      end
+
+      # TODO: check specification
+      xit { expect(plot['title']).to be_nil }
+    end
+
+    context 'when value was set, unset and set again' do
+      before do
+        plot.title "My Title"
+        plot.unset "title"
+        plot.title "My New Title"
+      end
+
+      # TODO: check specification
+      xit "returns the last value set" do
+        expect(plot['title']).to eq('"My New Title"')
+      end
+    end
+  end
 end

From ff92d733b8aed7559d89b4e3dab0face6d8a59c1 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Sun, 24 Nov 2019 13:16:34 +0100
Subject: [PATCH 42/55] Add spec over Plot#unset

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index e0ca332..1753526 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -87,7 +87,33 @@
   it_behaves_like 'quotes value when setting in a plot for', :cblabel
   it_behaves_like 'quotes value when setting in a plot for', :zlabel
 
-  describe '[]' do
+  describe '#unset' do
+    let(:expected_string) do
+      [
+        'set title "My Title"',
+        'unset title',
+        ''
+      ].join("\n")
+    end
+
+    before do
+      plot.title 'My Title'
+    end
+
+    # TODO: check specification
+    xit 'changes value in current settings' do
+      expect { plot.unset 'title' }
+        .to change { plot['title'] }
+        .from('My title').to(nil)
+    end
+
+    it 'unsets key on output' do
+      plot.unset 'title'
+      expect(plot.to_gplot).to eq(expected_string)
+    end
+  end
+
+  describe '#[]' do
     context 'when value was never set' do
       it { expect(plot['key']).to be_nil }
     end

From 1134bb52aeb97da56d1e9983ec39fc26db3344ce Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Mon, 25 Nov 2019 09:23:09 +0100
Subject: [PATCH 43/55] Checks changes in settings

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 1753526..5913d63 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -7,6 +7,16 @@
     it 'quotes value when setting it' do
       expect(plot.to_gplot).to eq("set #{field} \"text\"\n")
     end
+
+    it 'enquees into settings' do
+      expect { plot.public_send(field, 'new text') }
+        .to change(plot, :settings)
+        .from([[:set, field.to_s, '"text"']])
+        .to([
+          [:set, field.to_s, '"text"'],
+          [:set, field.to_s, '"new text"']
+      ])
+    end
   end
 end
 

From 2a802c3bd3dbf4bca32eb4c8b4610f079b6e6132 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Mon, 25 Nov 2019 09:27:12 +0100
Subject: [PATCH 44/55] Add method missing spec

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 5913d63..f514695 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -177,4 +177,22 @@
       end
     end
   end
+
+  describe 'method missing' do
+    it 'delegates to set call' do
+      expect { plot.fake_field('value') }
+        .to change(plot, :settings)
+        .from([])
+        .to([[:set, 'fake_field', 'value']])
+    end
+
+    context 'when field should be quoted' do
+      it 'delegates to set call and quote it' do
+        expect { plot.output('value') }
+          .to change(plot, :settings)
+          .from([])
+          .to([[:set, 'output', '"value"']])
+      end
+    end
+  end
 end

From b4424337da0cbd5ed0973ab71516425fe5d4779c Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Tue, 26 Nov 2019 09:18:01 +0100
Subject: [PATCH 45/55] Add spec over style class

---
 spec/lib/ruby_gnuplot/style_spec.rb | 65 ++++++++++++++++++++++++++++-
 1 file changed, 63 insertions(+), 2 deletions(-)

diff --git a/spec/lib/ruby_gnuplot/style_spec.rb b/spec/lib/ruby_gnuplot/style_spec.rb
index 8383fb8..b80f845 100644
--- a/spec/lib/ruby_gnuplot/style_spec.rb
+++ b/spec/lib/ruby_gnuplot/style_spec.rb
@@ -1,5 +1,66 @@
-describe Gnuplot::Plot do
+describe Gnuplot::Plot::Style do
   subject(:style) { described_class.new }
 
-  xit "Adds tests here"
+  let(:index) { style.index }
+
+  describe '#to_s' do
+    context "when nothing has been set" do
+      it 'creates an empty style' do
+        expect(style.to_s).to eq("set style line #{index}")
+      end
+    end
+
+    context 'when setting the stype' do
+      before do
+        style.ls = 1
+        style.lw = 2
+        style.lc = 3
+        style.pt = 4
+        style.ps = 5
+        style.fs = 6
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+
+    context 'when setting the stype on initialize' do
+      subject(:style) do
+        described_class.new do |style|
+          style.ls = 1
+          style.lw = 2
+          style.lc = 3
+          style.pt = 4
+          style.ps = 5
+          style.fs = 6
+        end
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+
+    context 'when setting using the full method name' do
+      before do
+        style.linestyle = 1
+        style.linewidth = 2
+        style.linecolor = 3
+        style.pointtype = 4
+        style.pointsize = 5
+        style.fill      = 6
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+  end
 end

From cf8c5024b4681eaf6d36127a8815de18daab95d3 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Tue, 26 Nov 2019 10:17:05 +0100
Subject: [PATCH 46/55] Fix Plot#[]

---
 lib/gnuplot.rb                     |  2 +-
 spec/lib/ruby_gnuplot/plot_spec.rb | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index 592b3e6..21ca23d 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -140,7 +140,7 @@ def unset ( var )
     # gnuplot process.
 
     def [] ( var )
-      v = @settings.rassoc( var )
+      v = @settings.reverse.rassoc( var )
       if v.nil? or v.first == :unset
           nil
       else
diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index f514695..8e86d43 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -111,10 +111,10 @@
     end
 
     # TODO: check specification
-    xit 'changes value in current settings' do
+    it 'changes value in current settings' do
       expect { plot.unset 'title' }
         .to change { plot['title'] }
-        .from('My title').to(nil)
+        .from('"My Title"').to(nil)
     end
 
     it 'unsets key on output' do
@@ -149,7 +149,7 @@
       end
 
       # TODO: check specification
-      xit "returns the last value set" do
+      it "returns the last value set" do
         expect(plot['title']).to eq('"My New Title"')
       end
     end
@@ -161,7 +161,7 @@
       end
 
       # TODO: check specification
-      xit { expect(plot['title']).to be_nil }
+      it { expect(plot['title']).to be_nil }
     end
 
     context 'when value was set, unset and set again' do
@@ -172,7 +172,7 @@
       end
 
       # TODO: check specification
-      xit "returns the last value set" do
+      it "returns the last value set" do
         expect(plot['title']).to eq('"My New Title"')
       end
     end

From 5e0055f4ca7fc7ca6bfc70c7bc61956026b03e5f Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Tue, 26 Nov 2019 10:19:20 +0100
Subject: [PATCH 47/55] Fix Plot#[]

---
 lib/gnuplot.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/gnuplot.rb b/lib/gnuplot.rb
index 592b3e6..21ca23d 100644
--- a/lib/gnuplot.rb
+++ b/lib/gnuplot.rb
@@ -140,7 +140,7 @@ def unset ( var )
     # gnuplot process.
 
     def [] ( var )
-      v = @settings.rassoc( var )
+      v = @settings.reverse.rassoc( var )
       if v.nil? or v.first == :unset
           nil
       else

From 8a0702c10861c3ecb5383adec7b69758be7effe4 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Tue, 26 Nov 2019 17:15:38 +0100
Subject: [PATCH 48/55] Add rubocop

---
 .rubocop.yml         |   2 +
 .rubocop_todo.yml    | 654 +++++++++++++++++++++++++++++++++++++++++++
 ruby_gnuplot.gemspec |   6 +-
 3 files changed, 660 insertions(+), 2 deletions(-)
 create mode 100644 .rubocop.yml
 create mode 100644 .rubocop_todo.yml

diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..6cc5ed4
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,2 @@
+require: rubocop-rspec
+inherit_from: .rubocop_todo.yml
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..2d1a124
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,654 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-11-26 16:16:51 +0000 using RuboCop version 0.73.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: with_first_argument, with_fixed_indentation
+Layout/AlignArguments:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/AlignArray:
+  Exclude:
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/EmptyLineAfterGuardClause:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/EmptyLineAfterMagicComment:
+  Exclude:
+    - 'ruby_gnuplot.gemspec'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAdjacentOneLineDefs, NumberOfEmptyLines.
+Layout/EmptyLineBetweenDefs:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 13
+# Cop supports --auto-correct.
+Layout/EmptyLines:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'spec/lib/ruby_gnuplot/plot_spec.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 21
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, no_empty_lines
+Layout/EmptyLinesAroundBlockBody:
+  Exclude:
+    - 'examples/multiple_data_sets.rb'
+    - 'spec/integration/arrtest_spec.rb'
+    - 'spec/integration/histtest_spec.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'spec/integration/sinwave_spec.rb'
+    - 'test/arrtest.rb'
+    - 'test/multtest.rb'
+    - 'test/sinwave.rb'
+
+# Offense count: 11
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines, beginning_only, ending_only
+Layout/EmptyLinesAroundClassBody:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Layout/EmptyLinesAroundMethodBody:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines
+Layout/EmptyLinesAroundModuleBody:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment, AllowBeforeTrailingComments, ForceEqualSignAlignment.
+Layout/ExtraSpacing:
+  Exclude:
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: IndentationWidth.
+Layout/IndentAssignment:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: IndentationWidth.
+# SupportedStyles: special_inside_parentheses, consistent, align_brackets
+Layout/IndentFirstArrayElement:
+  EnforcedStyle: consistent
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: normal, indented_internal_methods
+Layout/IndentationConsistency:
+  Exclude:
+    - 'examples/multiple_data_sets.rb'
+    - 'lib/gnuplot.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: Width, IgnoredPatterns.
+Layout/IndentationWidth:
+  Exclude:
+    - 'examples/3d_surface_plot.rb'
+    - 'lib/gnuplot.rb'
+    - 'spec/integration/multtest_spec.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Layout/SpaceAfterComma:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 13
+# Cop supports --auto-correct.
+Layout/SpaceAfterMethodName:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceAroundEqualsInParameterDefault:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'examples/discrete_points.rb'
+    - 'examples/multiple_data_sets.rb'
+    - 'ruby_gnuplot.gemspec'
+    - 'spec/integration/arrtest_spec.rb'
+    - 'spec/integration/histtest_spec.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'test/arrtest.rb'
+    - 'test/histtest.rb'
+    - 'test/multtest.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceBeforeBlockBraces:
+  Exclude:
+    - 'examples/histogram.rb'
+    - 'lib/gnuplot.rb'
+
+# Offense count: 18
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBrackets.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBrackets: space, no_space
+Layout/SpaceInsideArrayLiteralBrackets:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/SpaceInsideArrayPercentLiteral:
+  Exclude:
+    - 'examples/histogram.rb'
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideBlockBraces:
+  Exclude:
+    - 'examples/histogram.rb'
+    - 'lib/gnuplot.rb'
+
+# Offense count: 120
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceInsideParens:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: IndentationWidth.
+Layout/Tab:
+  Exclude:
+    - 'examples/3d_surface_plot.rb'
+    - 'examples/multiple_data_sets.rb'
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: final_newline, final_blank_line
+Layout/TrailingBlankLines:
+  Exclude:
+    - 'examples/histogram.rb'
+    - 'examples/sin_wave.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'spec/integration/sinwave_spec.rb'
+    - 'test/arrtest.rb'
+    - 'test/histtest.rb'
+    - 'test/multtest.rb'
+    - 'test/sinwave.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 27
+# Cop supports --auto-correct.
+# Configuration parameters: AllowInHeredoc.
+Layout/TrailingWhitespace:
+  Exclude:
+    - 'examples/discrete_points.rb'
+    - 'examples/histogram.rb'
+    - 'examples/multiple_data_sets.rb'
+    - 'examples/output_image_file.rb'
+    - 'examples/sin_wave.rb'
+
+# Offense count: 1
+Lint/AmbiguousOperator:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 2
+Lint/ShadowingOuterLocalVariable:
+  Exclude:
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
+Lint/UnusedBlockArgument:
+  Exclude:
+    - 'test/histtest.rb'
+
+# Offense count: 1
+Lint/UselessAssignment:
+  Exclude:
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 3
+Metrics/AbcSize:
+  Max: 23
+
+# Offense count: 9
+# Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
+Metrics/BlockLength:
+  Max: 143
+
+# Offense count: 1
+Metrics/CyclomaticComplexity:
+  Max: 13
+
+# Offense count: 8
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/MethodLength:
+  Max: 22
+
+# Offense count: 1
+Metrics/PerceivedComplexity:
+  Max: 12
+
+# Offense count: 1
+# Configuration parameters: EnforcedStyleForLeadingUnderscores.
+# SupportedStylesForLeadingUnderscores: disallowed, required, optional
+Naming/MemoizedInstanceVariableName:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 4
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to, by, on, in, at, ip, db
+Naming/UncommunicativeMethodParamName:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: snake_case, camelCase
+Naming/VariableName:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 4
+RSpec/DescribeClass:
+  Exclude:
+    - 'spec/integration/arrtest_spec.rb'
+    - 'spec/integration/histtest_spec.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'spec/integration/sinwave_spec.rb'
+
+# Offense count: 1
+# Configuration parameters: Max.
+RSpec/ExampleLength:
+  Exclude:
+    - 'spec/lib/ruby_gnuplot/plot_spec.rb'
+
+# Offense count: 1
+# Configuration parameters: CustomTransform, IgnoreMethods.
+RSpec/FilePath:
+  Exclude:
+    - 'spec/lib/ruby_gnuplot/style_spec.rb'
+
+# Offense count: 1
+Security/Eval:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 16
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: prefer_alias, prefer_alias_method
+Style/Alias:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/BlockComments:
+  Exclude:
+    - 'spec/spec_helper.rb'
+
+# Offense count: 8
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ProceduralMethods, FunctionalMethods, IgnoredMethods, AllowBracesOnProceduralOneLiners.
+# SupportedStyles: line_count_based, semantic, braces_for_chaining, always_braces
+# ProceduralMethods: benchmark, bm, bmbm, create, each_with_object, measure, new, realtime, tap, with_object
+# FunctionalMethods: let, let!, subject, watch
+# IgnoredMethods: lambda, proc, it
+Style/BlockDelimiters:
+  Exclude:
+    - 'examples/multiple_data_sets.rb'
+    - 'lib/gnuplot.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'test/multtest.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: is_a?, kind_of?
+Style/ClassCheck:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Style/ClassMethods:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+Style/ColonMethodCall:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SingleLineConditionsOnly, IncludeTernaryExpressions.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 7
+Style/Documentation:
+  Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/Encoding:
+  Exclude:
+    - 'ruby_gnuplot.gemspec'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+Style/ExpandPathArguments:
+  Exclude:
+    - 'Rakefile'
+    - 'examples/3d_surface_plot.rb'
+    - 'examples/discrete_points.rb'
+    - 'examples/histogram.rb'
+    - 'examples/multiple_data_sets.rb'
+    - 'examples/output_image_file.rb'
+    - 'examples/sin_wave.rb'
+    - 'ruby_gnuplot.gemspec'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: each, for
+Style/For:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 23
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# Offense count: 1
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
+# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
+Style/HashSyntax:
+  EnforcedStyle: hash_rockets
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/IfUnlessModifier:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+Style/IfUnlessModifierOfIfUnless:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoredMethods.
+Style/MethodCallWithoutArgsParentheses:
+  Exclude:
+    - 'test/histtest.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_no_parentheses_except_multiline
+Style/MethodDefParentheses:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+Style/MethodMissingSuper:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+Style/MissingRespondToMissing:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/MultilineIfThen:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: literals, strict
+Style/MutableConstant:
+  Exclude:
+    - 'lib/gnuplot.rb'
+    - 'lib/ruby_gnuplot/version.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: both, prefix, postfix
+Style/NegatedIf:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/NestedModifier:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/Not:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 18
+# Cop supports --auto-correct.
+# Configuration parameters: Strict.
+Style/NumericLiterals:
+  MinDigits: 7
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, EnforcedStyle, IgnoredMethods.
+# SupportedStyles: predicate, comparison
+Style/NumericPredicate:
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/gnuplot.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: AllowSafeAssignment, AllowInMultilineConditions.
+Style/ParenthesesAroundCondition:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Exclude:
+    - 'examples/histogram.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: AllowMultipleReturnValues.
+Style/RedundantReturn:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Style/RedundantSelf:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: use_perl_names, use_english_names
+Style/SpecialGlobalVars:
+  Exclude:
+    - 'ruby_gnuplot.gemspec'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/StderrPuts:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 235
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: MinSize.
+# SupportedStyles: percent, brackets
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoredMethods.
+# IgnoredMethods: respond_to, define_method
+Style/SymbolProc:
+  Exclude:
+    - 'examples/discrete_points.rb'
+    - 'examples/histogram.rb'
+    - 'examples/multiple_data_sets.rb'
+    - 'lib/gnuplot.rb'
+    - 'spec/integration/arrtest_spec.rb'
+    - 'spec/integration/multtest_spec.rb'
+    - 'test/arrtest.rb'
+    - 'test/multtest.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, AllowSafeAssignment.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_parentheses_when_complex
+Style/TernaryParentheses:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, no_comma
+Style/TrailingCommaInArrayLiteral:
+  Exclude:
+    - 'examples/histogram.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: WordRegex.
+# SupportedStyles: percent, brackets
+Style/WordArray:
+  EnforcedStyle: percent
+  MinSize: 10
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: forbid_for_all_comparison_operators, forbid_for_equality_operators_only, require_for_all_comparison_operators, require_for_equality_operators_only
+Style/YodaCondition:
+  Exclude:
+    - 'test/test_gnuplot.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/ZeroLengthPredicate:
+  Exclude:
+    - 'lib/gnuplot.rb'
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 115
diff --git a/ruby_gnuplot.gemspec b/ruby_gnuplot.gemspec
index c070c96..97239a1 100644
--- a/ruby_gnuplot.gemspec
+++ b/ruby_gnuplot.gemspec
@@ -18,6 +18,8 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_development_dependency 'minitest'
-  s.add_development_dependency 'rspec',     '3.9.0'
-  s.add_development_dependency 'simplecov', '0.17.0'
+  s.add_development_dependency 'rspec',         '3.9.0'
+  s.add_development_dependency 'rubocop',       '0.73.0'
+  s.add_development_dependency 'rubocop-rspec', '1.33.0'
+  s.add_development_dependency 'simplecov',     '0.17.0'
 end

From 91fca063b14d82f4c394ce47a24f8247130224b7 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Tue, 26 Nov 2019 17:18:35 +0100
Subject: [PATCH 49/55] Apply rubocop fixes

---
 .rubocop.yml                                  |   7 ++
 .rubocop_todo.yml                             |  66 ++---------
 spec/integration/arrtest_spec.rb              |   6 +-
 spec/integration/histtest_spec.rb             |   3 +-
 spec/integration/multtest_spec.rb             |  19 ++--
 spec/integration/sinwave_spec.rb              |   5 -
 .../lib/ruby_gnuplot/{ => plot}/style_spec.rb |   0
 spec/lib/ruby_gnuplot/plot_spec.rb            |  13 ++-
 spec/spec_helper.rb                           | 104 +++++++++---------
 spec/support/models/random_generator.rb       |   2 +-
 10 files changed, 86 insertions(+), 139 deletions(-)
 rename spec/lib/ruby_gnuplot/{ => plot}/style_spec.rb (100%)

diff --git a/.rubocop.yml b/.rubocop.yml
index 6cc5ed4..2b2ba5e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,2 +1,9 @@
 require: rubocop-rspec
 inherit_from: .rubocop_todo.yml
+
+AllCops:
+  TargetRubyVersion: 2.5
+
+RSpec/DescribeClass:
+  Exclude:
+    - 'spec/**/*_spec.rb'
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 2d1a124..961b79d 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2019-11-26 16:16:51 +0000 using RuboCop version 0.73.0.
+# on 2019-11-26 16:32:38 +0000 using RuboCop version 0.73.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -41,25 +41,20 @@ Layout/EmptyLineBetweenDefs:
     - 'lib/gnuplot.rb'
     - 'test/test_gnuplot.rb'
 
-# Offense count: 13
+# Offense count: 12
 # Cop supports --auto-correct.
 Layout/EmptyLines:
   Exclude:
     - 'lib/gnuplot.rb'
-    - 'spec/lib/ruby_gnuplot/plot_spec.rb'
     - 'test/test_gnuplot.rb'
 
-# Offense count: 21
+# Offense count: 10
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: empty_lines, no_empty_lines
 Layout/EmptyLinesAroundBlockBody:
   Exclude:
     - 'examples/multiple_data_sets.rb'
-    - 'spec/integration/arrtest_spec.rb'
-    - 'spec/integration/histtest_spec.rb'
-    - 'spec/integration/multtest_spec.rb'
-    - 'spec/integration/sinwave_spec.rb'
     - 'test/arrtest.rb'
     - 'test/multtest.rb'
     - 'test/sinwave.rb'
@@ -102,13 +97,6 @@ Layout/IndentAssignment:
   Exclude:
     - 'lib/gnuplot.rb'
 
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: IndentationWidth.
-# SupportedStyles: special_inside_parentheses, consistent, align_brackets
-Layout/IndentFirstArrayElement:
-  EnforcedStyle: consistent
-
 # Offense count: 2
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
@@ -118,14 +106,13 @@ Layout/IndentationConsistency:
     - 'examples/multiple_data_sets.rb'
     - 'lib/gnuplot.rb'
 
-# Offense count: 6
+# Offense count: 5
 # Cop supports --auto-correct.
 # Configuration parameters: Width, IgnoredPatterns.
 Layout/IndentationWidth:
   Exclude:
     - 'examples/3d_surface_plot.rb'
     - 'lib/gnuplot.rb'
-    - 'spec/integration/multtest_spec.rb'
 
 # Offense count: 2
 # Cop supports --auto-correct.
@@ -147,7 +134,7 @@ Layout/SpaceAroundEqualsInParameterDefault:
   Exclude:
     - 'lib/gnuplot.rb'
 
-# Offense count: 9
+# Offense count: 6
 # Cop supports --auto-correct.
 # Configuration parameters: AllowForAlignment.
 Layout/SpaceAroundOperators:
@@ -155,9 +142,6 @@ Layout/SpaceAroundOperators:
     - 'examples/discrete_points.rb'
     - 'examples/multiple_data_sets.rb'
     - 'ruby_gnuplot.gemspec'
-    - 'spec/integration/arrtest_spec.rb'
-    - 'spec/integration/histtest_spec.rb'
-    - 'spec/integration/multtest_spec.rb'
     - 'test/arrtest.rb'
     - 'test/histtest.rb'
     - 'test/multtest.rb'
@@ -215,7 +199,7 @@ Layout/Tab:
     - 'lib/gnuplot.rb'
     - 'test/test_gnuplot.rb'
 
-# Offense count: 9
+# Offense count: 7
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: final_newline, final_blank_line
@@ -223,8 +207,6 @@ Layout/TrailingBlankLines:
   Exclude:
     - 'examples/histogram.rb'
     - 'examples/sin_wave.rb'
-    - 'spec/integration/multtest_spec.rb'
-    - 'spec/integration/sinwave_spec.rb'
     - 'test/arrtest.rb'
     - 'test/histtest.rb'
     - 'test/multtest.rb'
@@ -308,26 +290,6 @@ Naming/VariableName:
   Exclude:
     - 'lib/gnuplot.rb'
 
-# Offense count: 4
-RSpec/DescribeClass:
-  Exclude:
-    - 'spec/integration/arrtest_spec.rb'
-    - 'spec/integration/histtest_spec.rb'
-    - 'spec/integration/multtest_spec.rb'
-    - 'spec/integration/sinwave_spec.rb'
-
-# Offense count: 1
-# Configuration parameters: Max.
-RSpec/ExampleLength:
-  Exclude:
-    - 'spec/lib/ruby_gnuplot/plot_spec.rb'
-
-# Offense count: 1
-# Configuration parameters: CustomTransform, IgnoreMethods.
-RSpec/FilePath:
-  Exclude:
-    - 'spec/lib/ruby_gnuplot/style_spec.rb'
-
 # Offense count: 1
 Security/Eval:
   Exclude:
@@ -349,13 +311,7 @@ Style/AndOr:
   Exclude:
     - 'lib/gnuplot.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/BlockComments:
-  Exclude:
-    - 'spec/spec_helper.rb'
-
-# Offense count: 8
+# Offense count: 6
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, ProceduralMethods, FunctionalMethods, IgnoredMethods, AllowBracesOnProceduralOneLiners.
 # SupportedStyles: line_count_based, semantic, braces_for_chaining, always_braces
@@ -366,7 +322,6 @@ Style/BlockDelimiters:
   Exclude:
     - 'examples/multiple_data_sets.rb'
     - 'lib/gnuplot.rb'
-    - 'spec/integration/multtest_spec.rb'
     - 'test/multtest.rb'
 
 # Offense count: 2
@@ -535,7 +490,6 @@ Style/NumericLiterals:
 # SupportedStyles: predicate, comparison
 Style/NumericPredicate:
   Exclude:
-    - 'spec/**/*'
     - 'lib/gnuplot.rb'
 
 # Offense count: 3
@@ -593,7 +547,7 @@ Style/StringLiterals:
 Style/SymbolArray:
   EnforcedStyle: brackets
 
-# Offense count: 9
+# Offense count: 7
 # Cop supports --auto-correct.
 # Configuration parameters: IgnoredMethods.
 # IgnoredMethods: respond_to, define_method
@@ -603,8 +557,6 @@ Style/SymbolProc:
     - 'examples/histogram.rb'
     - 'examples/multiple_data_sets.rb'
     - 'lib/gnuplot.rb'
-    - 'spec/integration/arrtest_spec.rb'
-    - 'spec/integration/multtest_spec.rb'
     - 'test/arrtest.rb'
     - 'test/multtest.rb'
 
@@ -646,7 +598,7 @@ Style/ZeroLengthPredicate:
   Exclude:
     - 'lib/gnuplot.rb'
 
-# Offense count: 7
+# Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
diff --git a/spec/integration/arrtest_spec.rb b/spec/integration/arrtest_spec.rb
index a5ae38e..49485f4 100644
--- a/spec/integration/arrtest_spec.rb
+++ b/spec/integration/arrtest_spec.rb
@@ -15,15 +15,14 @@
 
     Gnuplot.open do |gp|
       Gnuplot::Plot.new( gp ) do |plot|
-
         plot.title  "Array Plot Example"
         plot.ylabel "x"
         plot.xlabel "x^2"
         plot.term   "postscript eps"
         plot.output path
 
-        x = (0..50).collect { |v| v.to_f }
-        y = x.collect { |v| v ** 2 }
+        x = (0..50).collect(&:to_f)
+        y = x.collect { |v| v**2 }
 
         plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
           ds.with = "linespoints"
@@ -31,7 +30,6 @@
         end
       end
     end
-
   end
 
   after do
diff --git a/spec/integration/histtest_spec.rb b/spec/integration/histtest_spec.rb
index 3cc98fa..7301023 100644
--- a/spec/integration/histtest_spec.rb
+++ b/spec/integration/histtest_spec.rb
@@ -15,7 +15,7 @@
     RandomGenerator.seed(0.17)
 
     collection = (0..500).collect do
-      (RandomGenerator.rand-0.5)**3
+      (RandomGenerator.rand - 0.5)**3
     end
 
     Gnuplot.open do |gp|
@@ -37,7 +37,6 @@
         plot.output path
       end
     end
-
   end
 
   after do
diff --git a/spec/integration/multtest_spec.rb b/spec/integration/multtest_spec.rb
index 31c5923..3da4043 100644
--- a/spec/integration/multtest_spec.rb
+++ b/spec/integration/multtest_spec.rb
@@ -15,7 +15,6 @@
 
     Gnuplot.open do |gp|
       Gnuplot::Plot.new( gp ) do |plot|
-
         plot.xrange "[-10:10]"
         plot.title  "Sin Wave Example"
         plot.ylabel "x"
@@ -24,34 +23,30 @@
         plot.term   "postscript eps"
         plot.output path
 
-        x = (0..50).collect { |v| v.to_f }
-        y = x.collect { |v| v ** 2 }
+        x = (0..50).collect(&:to_f)
+        y = x.collect { |v| v**2 }
 
         plot.data = [
-          Gnuplot::DataSet.new( "sin(x)" ) { |ds|
+          Gnuplot::DataSet.new( "sin(x)" ) do |ds|
             ds.with = "lines"
             ds.title = "String function"
             ds.linewidth = 4
-          },
+          end,
 
-          Gnuplot::DataSet.new( [x, y] ) { |ds|
+          Gnuplot::DataSet.new( [x, y] ) do |ds|
             ds.with = "linespoints"
             ds.title = "Array data"
-          }
+          end
         ]
-
       end
-
     end
-
   end
 
   after do
-   File.delete(file_path)
+    File.delete(file_path)
   end
 
   it "plots expected file" do
     expect(file_content).to eq(fixture_content)
   end
 end
-
diff --git a/spec/integration/sinwave_spec.rb b/spec/integration/sinwave_spec.rb
index 821502c..c27e7f5 100644
--- a/spec/integration/sinwave_spec.rb
+++ b/spec/integration/sinwave_spec.rb
@@ -15,7 +15,6 @@
 
     Gnuplot.open do |gp|
       Gnuplot::Plot.new( gp ) do |plot|
-
         plot.xrange "[-10:10]"
         plot.title  "Sin Wave Example"
         plot.ylabel "x"
@@ -28,11 +27,8 @@
           ds.with = "lines"
           ds.linewidth = 4
         end
-
       end
-
     end
-
   end
 
   after do
@@ -43,4 +39,3 @@
     expect(file_content).to eq(fixture_content)
   end
 end
-
diff --git a/spec/lib/ruby_gnuplot/style_spec.rb b/spec/lib/ruby_gnuplot/plot/style_spec.rb
similarity index 100%
rename from spec/lib/ruby_gnuplot/style_spec.rb
rename to spec/lib/ruby_gnuplot/plot/style_spec.rb
diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 8e86d43..4acdd21 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -4,6 +4,13 @@
       plot.public_send(field, 'text')
     end
 
+    let(:expected_settings) do
+      [
+        [:set, field.to_s, '"text"'],
+        [:set, field.to_s, '"new text"']
+      ]
+    end
+
     it 'quotes value when setting it' do
       expect(plot.to_gplot).to eq("set #{field} \"text\"\n")
     end
@@ -12,10 +19,7 @@
       expect { plot.public_send(field, 'new text') }
         .to change(plot, :settings)
         .from([[:set, field.to_s, '"text"']])
-        .to([
-          [:set, field.to_s, '"text"'],
-          [:set, field.to_s, '"new text"']
-      ])
+        .to(expected_settings)
     end
   end
 end
@@ -35,7 +39,6 @@
       ].join("\n")
     end
 
-
     context 'when nothing has been set' do
       it "returns an empty string" do
         expect(plot.to_gplot).to eq('')
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 38530b9..e2940fd 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -55,57 +55,55 @@
   # triggering implicit auto-inclusion in groups with matching metadata.
   config.shared_context_metadata_behavior = :apply_to_host_groups
 
-# The settings below are suggested to provide a good initial experience
-# with RSpec, but feel free to customize to your heart's content.
-=begin
-  # This allows you to limit a spec run to individual examples or groups
-  # you care about by tagging them with `:focus` metadata. When nothing
-  # is tagged with `:focus`, all examples get run. RSpec also provides
-  # aliases for `it`, `describe`, and `context` that include `:focus`
-  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
-  config.filter_run_when_matching :focus
-
-  # Allows RSpec to persist some state between runs in order to support
-  # the `--only-failures` and `--next-failure` CLI options. We recommend
-  # you configure your source control system to ignore this file.
-  config.example_status_persistence_file_path = "spec/examples.txt"
-
-  # Limits the available syntax to the non-monkey patched syntax that is
-  # recommended. For more details, see:
-  #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
-  #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
-  #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
-  config.disable_monkey_patching!
-
-  # This setting enables warnings. It's recommended, but in some cases may
-  # be too noisy due to issues in dependencies.
-  config.warnings = true
-
-  # Many RSpec users commonly either run the entire suite or an individual
-  # file, and it's useful to allow more verbose output when running an
-  # individual spec file.
-  if config.files_to_run.one?
-    # Use the documentation formatter for detailed output,
-    # unless a formatter has already been configured
-    # (e.g. via a command-line flag).
-    config.default_formatter = "doc"
-  end
-
-  # Print the 10 slowest examples and example groups at the
-  # end of the spec run, to help surface which specs are running
-  # particularly slow.
-  config.profile_examples = 10
-
-  # Run specs in random order to surface order dependencies. If you find an
-  # order dependency and want to debug it, you can fix the order by providing
-  # the seed, which is printed after each run.
-  #     --seed 1234
-  config.order = :random
-
-  # Seed global randomization in this process using the `--seed` CLI option.
-  # Setting this allows you to use `--seed` to deterministically reproduce
-  # test failures related to randomization by passing the same `--seed` value
-  # as the one that triggered the failure.
-  Kernel.srand config.seed
-=end
+  # The settings below are suggested to provide a good initial experience
+  # with RSpec, but feel free to customize to your heart's content.
+  #   # This allows you to limit a spec run to individual examples or groups
+  #   # you care about by tagging them with `:focus` metadata. When nothing
+  #   # is tagged with `:focus`, all examples get run. RSpec also provides
+  #   # aliases for `it`, `describe`, and `context` that include `:focus`
+  #   # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  #   config.filter_run_when_matching :focus
+  #
+  #   # Allows RSpec to persist some state between runs in order to support
+  #   # the `--only-failures` and `--next-failure` CLI options. We recommend
+  #   # you configure your source control system to ignore this file.
+  #   config.example_status_persistence_file_path = "spec/examples.txt"
+  #
+  #   # Limits the available syntax to the non-monkey patched syntax that is
+  #   # recommended. For more details, see:
+  #   #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
+  #   #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+  #   #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
+  #   config.disable_monkey_patching!
+  #
+  #   # This setting enables warnings. It's recommended, but in some cases may
+  #   # be too noisy due to issues in dependencies.
+  #   config.warnings = true
+  #
+  #   # Many RSpec users commonly either run the entire suite or an individual
+  #   # file, and it's useful to allow more verbose output when running an
+  #   # individual spec file.
+  #   if config.files_to_run.one?
+  #     # Use the documentation formatter for detailed output,
+  #     # unless a formatter has already been configured
+  #     # (e.g. via a command-line flag).
+  #     config.default_formatter = "doc"
+  #   end
+  #
+  #   # Print the 10 slowest examples and example groups at the
+  #   # end of the spec run, to help surface which specs are running
+  #   # particularly slow.
+  #   config.profile_examples = 10
+  #
+  #   # Run specs in random order to surface order dependencies. If you find an
+  #   # order dependency and want to debug it, you can fix the order by providing
+  #   # the seed, which is printed after each run.
+  #   #     --seed 1234
+  #   config.order = :random
+  #
+  #   # Seed global randomization in this process using the `--seed` CLI option.
+  #   # Setting this allows you to use `--seed` to deterministically reproduce
+  #   # test failures related to randomization by passing the same `--seed` value
+  #   # as the one that triggered the failure.
+  #   Kernel.srand config.seed
 end
diff --git a/spec/support/models/random_generator.rb b/spec/support/models/random_generator.rb
index 96e752e..5ad8062 100644
--- a/spec/support/models/random_generator.rb
+++ b/spec/support/models/random_generator.rb
@@ -12,7 +12,7 @@ def rand
 
     def seed(value)
       @rand = value.abs % 1
-      @rand = nil if @rand == 0
+      @rand = nil if @rand.zero?
     end
   end
 end

From 0ba30730d44c7b17a27847d50cac3efc146778ef Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 27 Nov 2019 09:28:38 +0100
Subject: [PATCH 50/55] Add spec for Plot#style

---
 .rubocop.yml                       |  4 ++++
 spec/lib/ruby_gnuplot/plot_spec.rb | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/.rubocop.yml b/.rubocop.yml
index 2b2ba5e..be02188 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -7,3 +7,7 @@ AllCops:
 RSpec/DescribeClass:
   Exclude:
     - 'spec/**/*_spec.rb'
+
+Metrics/BlockLength:
+  Exclude:
+    - 'spec/**/*_spec.rb'
diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 4acdd21..0b2db45 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -198,4 +198,23 @@
       end
     end
   end
+
+  describe '#style' do
+    subject(:plot) do
+      described_class.new do |p|
+        p.title 'My title'
+        p.style do |style|
+          style.ls = 1
+        end
+      end
+    end
+
+    let(:expected_output) do
+      /^set title "My title"\nset style line \d+ ls 1\n$/
+    end
+
+    it 'adds style to gplot output' do
+      expect(plot.to_gplot).to match(expected_output)
+    end
+  end
 end

From 93ba7af80d19fd1968677b8eafc81281853b5f7c Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 27 Nov 2019 09:29:13 +0100
Subject: [PATCH 51/55] Remove TODOs

---
 spec/lib/ruby_gnuplot/plot_spec.rb | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/spec/lib/ruby_gnuplot/plot_spec.rb b/spec/lib/ruby_gnuplot/plot_spec.rb
index 0b2db45..49e4279 100644
--- a/spec/lib/ruby_gnuplot/plot_spec.rb
+++ b/spec/lib/ruby_gnuplot/plot_spec.rb
@@ -113,7 +113,6 @@
       plot.title 'My Title'
     end
 
-    # TODO: check specification
     it 'changes value in current settings' do
       expect { plot.unset 'title' }
         .to change { plot['title'] }
@@ -151,7 +150,6 @@
         plot.title "My New Title"
       end
 
-      # TODO: check specification
       it "returns the last value set" do
         expect(plot['title']).to eq('"My New Title"')
       end
@@ -163,7 +161,6 @@
         plot.unset "title"
       end
 
-      # TODO: check specification
       it { expect(plot['title']).to be_nil }
     end
 
@@ -174,7 +171,6 @@
         plot.title "My New Title"
       end
 
-      # TODO: check specification
       it "returns the last value set" do
         expect(plot['title']).to eq('"My New Title"')
       end

From 1564edc4c5cbfbf38302b50a888a5ca917064b03 Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Wed, 27 Nov 2019 18:20:10 +0100
Subject: [PATCH 52/55] Add data set spec

---
 spec/lib/ruby_gnuplot/data_set_spec.rb | 55 ++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 spec/lib/ruby_gnuplot/data_set_spec.rb

diff --git a/spec/lib/ruby_gnuplot/data_set_spec.rb b/spec/lib/ruby_gnuplot/data_set_spec.rb
new file mode 100644
index 0000000..380aaab
--- /dev/null
+++ b/spec/lib/ruby_gnuplot/data_set_spec.rb
@@ -0,0 +1,55 @@
+require 'spec_helper'
+
+describe Gnuplot::DataSet do
+  subject(:data_set) { described_class.new(data) }
+
+  describe '#to_gplot' do
+    context 'when data is an empty array' do
+      let(:data) { [] }
+
+      it do
+        expect(data_set.to_gplot).to eq('')
+      end
+    end
+
+    context 'when data is an array of numbers' do
+      let(:data) { [1, 10.0, 2.3] }
+
+      it 'converts to gplot format' do
+        expect(data_set.to_gplot).to eq("1\n10.0\n2.3")
+      end
+    end
+
+    context 'when data is a matrix of numbers' do
+      let(:data) { [[1, 10.0], [0, 2]] }
+
+      it 'converts to gplot matrix format' do
+        expect(data_set.to_gplot).to eq("1 0\n10.0 2\ne")
+      end
+    end
+
+    context 'when data is a string' do
+      let(:data) { 'x' }
+
+      it do
+        expect(data_set.to_gplot).to be_nil
+      end
+    end
+
+    context 'when data is an instance of Matrix' do
+      xit 'to be implemented'
+    end
+
+    context 'when data is nil' do
+      let(:data) { nil }
+
+      it do
+        expect(data_set.to_gplot).to be_nil
+      end
+
+      it 'assigns data' do
+        expect(data_set.data).to eq(data)
+      end
+    end
+  end
+end

From 6decfe0848094128c0d5b6d6cacc45ef53106afb Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Thu, 28 Nov 2019 22:10:19 +0100
Subject: [PATCH 53/55] Add spec for data set with properties

---
 spec/lib/ruby_gnuplot/data_set_spec.rb | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/spec/lib/ruby_gnuplot/data_set_spec.rb b/spec/lib/ruby_gnuplot/data_set_spec.rb
index 380aaab..a42505f 100644
--- a/spec/lib/ruby_gnuplot/data_set_spec.rb
+++ b/spec/lib/ruby_gnuplot/data_set_spec.rb
@@ -3,6 +3,8 @@
 describe Gnuplot::DataSet do
   subject(:data_set) { described_class.new(data) }
 
+  let(:data) { nil }
+
   describe '#to_gplot' do
     context 'when data is an empty array' do
       let(:data) { [] }
@@ -41,8 +43,6 @@
     end
 
     context 'when data is nil' do
-      let(:data) { nil }
-
       it do
         expect(data_set.to_gplot).to be_nil
       end
@@ -51,5 +51,20 @@
         expect(data_set.data).to eq(data)
       end
     end
+
+    context 'when setting attributes' do
+      subject(:data_set) do
+        described_class.new do |ds|
+          ds.with  = 'lines'
+          ds.using = '1:2'
+          ds.data = [ [0, 1, 2], [1, 2, 5] ]
+        end
+      end
+
+      it 'returns only the data' do
+        expect(data_set.to_gplot)
+          .to eq("0 1\n1 2\n2 5\ne")
+      end
+    end
   end
 end

From 21fabe5b16658cf7771aaecb9b387c938910240e Mon Sep 17 00:00:00 2001
From: darthjee <darthjee@gmail.com>
Date: Thu, 28 Nov 2019 22:25:21 +0100
Subject: [PATCH 54/55] WIP add spec for plot args

---
 spec/lib/ruby_gnuplot/data_set_spec.rb | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/spec/lib/ruby_gnuplot/data_set_spec.rb b/spec/lib/ruby_gnuplot/data_set_spec.rb
index a42505f..efb96f8 100644
--- a/spec/lib/ruby_gnuplot/data_set_spec.rb
+++ b/spec/lib/ruby_gnuplot/data_set_spec.rb
@@ -52,7 +52,7 @@
       end
     end
 
-    context 'when setting attributes' do
+    context 'when setting attributes in a block' do
       subject(:data_set) do
         described_class.new do |ds|
           ds.with  = 'lines'
@@ -67,4 +67,23 @@
       end
     end
   end
+
+  describe '#plot_args' do
+    context 'when setting attributes on initialize block' do
+      subject(:data_set) do
+        described_class.new do |ds|
+          ds.with  = 'lines'
+          ds.using = '1:2'
+          ds.data = data
+        end
+      end
+
+      let(:data) { [ [0, 1, 2], [1, 2, 5] ] }
+
+      it 'returns plot attributes' do
+        expect(data_set.plot_args)
+          .to eq("'-' using 1:2 with lines")
+      end
+    end
+  end
 end

From ac66888a0240b4227248d7f520c25a9ef87a4850 Mon Sep 17 00:00:00 2001
From: Roger Pack <rogerpack2005@gmail.com>
Date: Fri, 20 Dec 2019 07:31:31 -0700
Subject: [PATCH 55/55] Update README.textile

Note security, thanks Emil
---
 README.textile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/README.textile b/README.textile
index 4ec5086..3757e4e 100644
--- a/README.textile
+++ b/README.textile
@@ -16,10 +16,10 @@ h2.  History and Background
     
 h2.  Pre-requisites and Installation
 
-      1. Install XQuartz from here: 
+      1. (mac) Install XQuartz from here: 
 	     @http://xquartz.macosforge.org/landing/@
 	  
-	  2. Install gnuplot with homebrew:
+	  2. Install gnuplot with homebrew (not OS X? install it using your package manager):
 	     @brew install gnuplot --with-x11@
 	  
 	  3. Install gnuplot gem:
@@ -188,6 +188,8 @@ File.open( "gnuplot.dat", "w") do |gp|
 end
 </pre>    
 
+h3. Miscellanrous
+
 You can also add arbitrary lines to the output 
 
 <pre>
@@ -196,3 +198,9 @@ plot.arbitrary_lines << "set ylabel \"y label\" font \"Helvetica,20\""
 
 See more in the examples folder.  Also since this is basically just a wrapper for gnuplot itself, you should be able to do anything that it can do (demos: 
 http://gnuplot.sourceforge.net/demo_4.4/ ) 
+
+h3. Security
+
+Note that if you pass any user-controlled strings to the gem, it's possible for an attacker to run arbitrary commands.
+
+In addition to title, any other graph properties that accept strings should be affected too.  they're all passed to the system command.  So only use strings you trust.