Added a new hook that allows extensions to add their own tests to the core test suite

docs/hooks.txt

@@ -1595,6 +1595,9 @@ $rev: revision (object) that will be viewed
 $action: action name
 $article: article "acted on"
 
+'UnitTestsList': Called when building a list of files with PHPUnit tests
+&$files: list of files
+
 'UnwatchArticle': before a watch is removed from an article
 $user: user watching
 $article: article object to be removed

maintenance/tests/phpunit

@@ -32,6 +32,7 @@ class MWPHPUnitCommand extends PHPUnit_TextUI_Command {
 		} else {
 			require( dirname( __FILE__ ) . '/TestFileList.php' );
 			$files = $testFiles;
+			wfRunHooks( 'UnitTestsList', array( &$files ) );
 		}
 		foreach ( $files as $file ) {
 			$suite->addTestFile( $file );