class AssetResolverTest

class AssetResolverTest extends UnitTestCase {
  
  /**
   * The tested asset resolver service.
   *
   * @var \Drupal\Core\Asset\AssetResolver
   */
  protected $assetResolver;
  
  /**
   * The mocked library discovery service.
   *
   * @var \Drupal\Core\Asset\LibraryDiscoveryInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $libraryDiscovery;
  
  /**
   * The mocked library dependency resolver.
   *
   * @var \Drupal\Core\Asset\LibraryDependencyResolverInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $libraryDependencyResolver;
  
  /**
   * The mocked module handler.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $moduleHandler;
  
  /**
   * The mocked theme manager.
   *
   * @var \Drupal\Core\Theme\ThemeManagerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $themeManager;
  
  /**
   * The mocked language manager.
   *
   * @var \Drupal\Core\Language\LanguageManagerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $languageManager;
  
  /**
   * The cache backend to use.
   *
   * @var \Drupal\Core\Cache\CacheBackendInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $cache;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->libraryDiscovery = $this->getMockBuilder('Drupal\\Core\\Asset\\LibraryDiscovery')
      ->disableOriginalConstructor()
      ->getMock();
    $this->libraryDependencyResolver = $this->createMock('\\Drupal\\Core\\Asset\\LibraryDependencyResolverInterface');
    $this->libraryDependencyResolver
      ->expects($this->any())
      ->method('getLibrariesWithDependencies')
      ->willReturnArgument(0);
    $this->moduleHandler = $this->createMock('\\Drupal\\Core\\Extension\\ModuleHandlerInterface');
    $this->themeManager = $this->createMock('\\Drupal\\Core\\Theme\\ThemeManagerInterface');
    $active_theme = $this->getMockBuilder('\\Drupal\\Core\\Theme\\ActiveTheme')
      ->disableOriginalConstructor()
      ->getMock();
    $this->themeManager
      ->expects($this->any())
      ->method('getActiveTheme')
      ->willReturn($active_theme);
    $this->languageManager = $this->createMock('\\Drupal\\Core\\Language\\LanguageManagerInterface');
    $english = $this->createMock('\\Drupal\\Core\\Language\\LanguageInterface');
    $english->expects($this->any())
      ->method('getId')
      ->willReturn('en');
    $japanese = $this->createMock('\\Drupal\\Core\\Language\\LanguageInterface');
    $japanese->expects($this->any())
      ->method('getId')
      ->willReturn('jp');
    $this->languageManager = $this->createMock('\\Drupal\\Core\\Language\\LanguageManagerInterface');
    $this->languageManager
      ->expects($this->any())
      ->method('getCurrentLanguage')
      ->will($this->onConsecutiveCalls($english, $english, $japanese, $japanese));
    $this->cache = new TestMemoryBackend();
    $this->assetResolver = new AssetResolver($this->libraryDiscovery, $this->libraryDependencyResolver, $this->moduleHandler, $this->themeManager, $this->languageManager, $this->cache);
  }
  
  /**
   * @covers ::getCssAssets
   * @dataProvider providerAttachedAssets
   */
  public function testGetCssAssets(AttachedAssetsInterface $assets_a, AttachedAssetsInterface $assets_b, $expected_cache_item_count) {
    $this->assetResolver
      ->getCssAssets($assets_a, FALSE);
    $this->assetResolver
      ->getCssAssets($assets_b, FALSE);
    $this->assertCount($expected_cache_item_count, $this->cache
      ->getAllCids());
  }
  
  /**
   * @covers ::getJsAssets
   * @dataProvider providerAttachedAssets
   */
  public function testGetJsAssets(AttachedAssetsInterface $assets_a, AttachedAssetsInterface $assets_b, $expected_cache_item_count) {
    $this->assetResolver
      ->getJsAssets($assets_a, FALSE);
    $this->assetResolver
      ->getJsAssets($assets_b, FALSE);
    $this->assertCount($expected_cache_item_count, $this->cache
      ->getAllCids());
    $this->assetResolver
      ->getJsAssets($assets_a, FALSE);
    $this->assetResolver
      ->getJsAssets($assets_b, FALSE);
    $this->assertCount($expected_cache_item_count * 2, $this->cache
      ->getAllCids());
  }
  public function providerAttachedAssets() {
    $time = time();
    return [
      'same libraries, different timestamps' => [
        (new AttachedAssets())->setAlreadyLoadedLibraries([])
          ->setLibraries([
          'core/drupal',
        ])
          ->setSettings([
          'currentTime' => $time,
        ]),
        (new AttachedAssets())->setAlreadyLoadedLibraries([])
          ->setLibraries([
          'core/drupal',
        ])
          ->setSettings([
          'currentTime' => $time + 100,
        ]),
        1,
      ],
      'different libraries, same timestamps' => [
        (new AttachedAssets())->setAlreadyLoadedLibraries([])
          ->setLibraries([
          'core/drupal',
        ])
          ->setSettings([
          'currentTime' => $time,
        ]),
        (new AttachedAssets())->setAlreadyLoadedLibraries([])
          ->setLibraries([
          'core/drupal',
          'core/jquery',
        ])
          ->setSettings([
          'currentTime' => $time,
        ]),
        2,
      ],
    ];
  }

}