class ThemeHandlerTest

class ThemeHandlerTest extends UnitTestCase {
  
  /**
   * The mocked config factory.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $configFactory;
  
  /**
   * The theme listing service.
   *
   * @var \Drupal\Core\Extension\ThemeExtensionList|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $themeList;
  
  /**
   * The tested theme handler.
   *
   * @var \Drupal\Core\Extension\ThemeHandler|\Drupal\Tests\Core\Extension\StubThemeHandler
   */
  protected $themeHandler;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->configFactory = $this->getConfigFactoryStub([
      'core.extension' => [
        'module' => [],
        'theme' => [
          'stark' => 'stark',
        ],
        'disabled' => [
          'theme' => [],
        ],
      ],
    ]);
    $this->themeList = $this->getMockBuilder(ThemeExtensionList::class)
      ->disableOriginalConstructor()
      ->getMock();
    $this->themeHandler = new StubThemeHandler($this->root, $this->configFactory, $this->themeList);
    $container = $this->createMock('Symfony\\Component\\DependencyInjection\\ContainerInterface');
    $container->expects($this->any())
      ->method('get')
      ->with('class_loader')
      ->willReturn($this->createMock(ClassLoader::class));
    \Drupal::setContainer($container);
  }
  
  /**
   * Tests empty libraries in theme.info.yml file.
   */
  public function testThemeLibrariesEmpty() : void {
    $theme = new Extension($this->root, 'theme', 'core/modules/system/tests/themes/test_theme_libraries_empty', 'test_theme_libraries_empty.info.yml');
    try {
      $this->themeHandler
        ->addTheme($theme);
      $this->assertTrue(TRUE, 'Empty libraries key in theme.info.yml does not cause PHP warning');
    } catch (\Exception) {
      $this->fail('Empty libraries key in theme.info.yml causes PHP warning.');
    }
  }
  
  /**
   * Test that a missing theme doesn't break ThemeHandler::listInfo().
   *
   * @legacy-covers ::listInfo
   */
  public function testMissingTheme() : void {
    $themes = $this->themeHandler
      ->listInfo();
    $this->assertSame([], $themes);
  }

}