From d73cb6aedfaa71aba6a46ed3b7e969500ee91259 Mon Sep 17 00:00:00 2001
From: Joran Jessurun <joran.jessurun@gmail.com>
Date: Sun, 10 Sep 2017 20:16:52 +0200
Subject: [PATCH] Added a test that checks that the roster is not changed after
 querying a grade.

---
 exercises/grade-school/grade_school_test.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/exercises/grade-school/grade_school_test.cpp b/exercises/grade-school/grade_school_test.cpp
index 7a118962..7a8d67f1 100644
--- a/exercises/grade-school/grade_school_test.cpp
+++ b/exercises/grade-school/grade_school_test.cpp
@@ -86,6 +86,13 @@ BOOST_AUTO_TEST_CASE(the_student_names_in_each_grade_in_the_roster_are_sorted)
         };
     BOOST_TEST(expected == actual);
 }
+
+BOOST_AUTO_TEST_CASE(checking_a_grade_should_not_change_the_roster)
+{
+    school_.grade(1);
+    BOOST_REQUIRE(school_.roster().empty());
+}
+
 #endif
 
 BOOST_AUTO_TEST_SUITE_END();