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' => [],
                '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 rebuilding the theme data.
     *
     * @see \Drupal\Core\Extension\ThemeHandler::rebuildThemeData()
     */
    public function testRebuildThemeData() {
        $this->themeList
            ->expects($this->once())
            ->method('reset')
            ->willReturnSelf();
        $this->themeList
            ->expects($this->once())
            ->method('getList')
            ->willReturn([
            'stark' => new Extension($this->root, 'theme', 'core/themes/stark/stark.info.yml', 'stark.theme'),
        ]);
        $theme_data = $this->themeHandler
            ->rebuildThemeData();
        $this->assertCount(1, $theme_data);
        $info = $theme_data['stark'];
        // Ensure some basic properties.
        $this->assertInstanceOf('Drupal\\Core\\Extension\\Extension', $info);
        $this->assertEquals('stark', $info->getName());
        $this->assertEquals('core/themes/stark/stark.info.yml', $info->getPathname());
        $this->assertEquals('core/themes/stark/stark.theme', $info->getExtensionPathname());
    }
    
    /**
     * Tests empty libraries in theme.info.yml file.
     */
    public function testThemeLibrariesEmpty() {
        $theme = new Extension($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 $e) {
            $this->fail('Empty libraries key in theme.info.yml causes PHP warning.');
        }
    }

}