fixes to WebDriver tests

Author: DavertMik

src/Codeception/Module/WebDriver.php

@@ -270,7 +270,7 @@ public function _after(TestInterface $test)
     public function _failed(TestInterface $test, $fail)
     {
         $this->debugWebDriverLogs();
-        $filename = str_replace(['::', '\\', '/'], ['.', '', ''], Descriptor::getTestSignature($test)) . '.fail';
+        $filename = str_replace([':', '\\', '/'], ['.', '', ''], Descriptor::getTestSignature($test)) . '.fail';
         $this->_saveScreenshot(codecept_output_dir() . $filename . '.png');
         $this->_savePageSource(codecept_output_dir() . $filename . '.html');
         $this->debug("Screenshot and page source were saved into '_output' dir");

tests/web/WebDriverTest.php

@@ -442,9 +442,7 @@ public function testCreateCestScreenshotOnFail()
             ]),
         ]);
         $this->module->webDriver = $fakeWd;
-        $cest = (new \Codeception\Test\Cest())
-            ->config('testClassInstance', new stdClass())
-            ->config('testMethod','login');
+        $cest = new \Codeception\Test\Cest(new stdClass(), 'login', 'someCest.php');
         $this->module->_failed($cest, new PHPUnit_Framework_AssertionFailedError());
     }