[4.0] Fixed running single system tests (#20036)

RoboFile.php

@@ -33,6 +33,14 @@ class RoboFile extends \Robo\Tasks
 {
 	use JoomlaRobo\Tasks;
 
+	/**
+	 * Path to the Selenium folder#
+	 *
+	 * @var   string
+	 * @since  3.7.3
+	 */
+	const SELENIUM_FOLDER = __DIR__ . '/libraries/vendor/joomla-projects/selenium-server-standalone';
+
 	/**
 	 * Path to the vendor folder
 	 *
@@ -265,7 +273,7 @@ public function runTests($opts = ['use-htaccess' => false, 'env' => 'desktop'])
 
 		$this->createTestingSite($opts['use-htaccess']);
 
-		$this->taskRunSelenium(__DIR__ . '/libraries/vendor/joomla-projects/selenium-server-standalone', $this->getWebdriver())->run();
+		$this->taskRunSelenium(self::SELENIUM_FOLDER, $this->getWebdriver())->run();
 
 		sleep(3);
 
@@ -313,7 +321,7 @@ public function runTests($opts = ['use-htaccess' => false, 'env' => 'desktop'])
 	 */
 	public function runTest($pathToTestFile = null, $suite = 'acceptance')
 	{
-		$this->taskRunSelenium('libraries/vendor/joomla-projects/selenium-server-standalone/bin', $this->getWebdriver());
+		$this->taskRunSelenium(self::SELENIUM_FOLDER, $this->getWebdriver());
 
 		// Make sure to run the build command to generate AcceptanceTester
 		$path = $this->vendorPath . 'bin/codecept';
@@ -325,7 +333,7 @@ public function runTest($pathToTestFile = null, $suite = 'acceptance')
 
 			$iterator = new RecursiveIteratorIterator(
 				new RecursiveDirectoryIterator(
-					$this->vendorPath . $suite,
+					$this->testsPath . '/' . $suite,
 					RecursiveDirectoryIterator::SKIP_DOTS
 				),
 				RecursiveIteratorIterator::SELF_FIRST
@@ -357,7 +365,7 @@ public function runTest($pathToTestFile = null, $suite = 'acceptance')
 			$test       = $tests[$testNumber];
 		}
 
-		$pathToTestFile = $this->vendorPath . 'joomla/test-system/' . $suite . '/' . $test;
+		$pathToTestFile = $this->testsPath . '/' . $suite . '/' . $test;
 
 		// Loading the class to display the methods in the class
 
@@ -369,7 +377,7 @@ public function runTest($pathToTestFile = null, $suite = 'acceptance')
 
 		if (isset($fileName[1]) && strripos($fileName[1], 'cest'))
 		{
-			require $this->vendorPath . $suite . '/' . $test;
+			require $this->testsPath . '/' . $suite . '/' . $test;
 
 			$className     = explode(".", $fileName[1]);
 			$class_methods = get_class_methods($className[0]);