TestDiscovery example

  public function testGetTestsInProfiles() {
    $this->setupVfsWithTestClasses();
    $class_loader = $this->prophesize(ClassLoader::class);

    $container = new Container();
    $container->set('kernel', new DrupalKernel('prod', new ClassLoader()));
    $container->setParameter('site.path', 'sites/default');
    \Drupal::setContainer($container);

    $test_discovery = new TestDiscovery('vfs://drupal', $class_loader->reveal());

    $result = $test_discovery->getTestClasses('test_profile_module', ['PHPUnit-Kernel']);
    $expected = [
      'example3' => [
        'Drupal\Tests\test_profile_module\Kernel\KernelExampleTest4' => [
          'name' => 'Drupal\Tests\test_profile_module\Kernel\KernelExampleTest4',
          'description' => 'Test description',
          'group' => 'example3',
          'groups' => ['example3'],
          'type' => 'PHPUnit-Kernel',
        ],
      ],

    // and there is no storage nor a (watchdog) logger here.     restore_error_handler();
    restore_exception_handler();

    // In addition, ensure that PHP errors are not hidden away in logs.     ini_set('display_errors', TRUE);

    parent::boot();

    $this->getContainer()->get('module_handler')->loadAll();

    $test_discovery = new TestDiscovery(
      $this->getContainer()->getParameter('app.root'),
      $this->getContainer()->get('class_loader')
    );
    $test_discovery->registerTestNamespaces();

    // Register stream wrappers.     $this->getContainer()->get('stream_wrapper_manager')->register();

    // Create the build/artifacts directory if necessary.     if (!is_dir('public://simpletest') && !@mkdir('public://simpletest', 0777, TRUE) && !is_dir('public://simpletest')) {
      throw new \RuntimeException('Unable to create directory: public://simpletest');
    }