/**
  * Returns an array with the names of all available test suites which are children of $suite
  *
  * @param ezpTestSuite $suite
  * @return array
  */
 protected function getSuites(ezpTestSuite $suite)
 {
     $suites = array();
     /** @var PHPUnit_Framework_Test[]|ezpTestSuite[] $tests */
     $tests = $suite->tests();
     foreach ($tests as $test) {
         $reflectionClass = new ReflectionClass($test);
         if ($reflectionClass->isSubclassOf('PHPUnit_Framework_TestSuite')) {
             $suites[] = $reflectionClass->getName();
         }
         if ($reflectionClass->isSubclassOf('ezpTestSuite')) {
             $suites = array_merge($suites, $this->getSuites($test));
         }
     }
     sort($suites);
     return $suites;
 }