class ImageFormatterTest

class ImageFormatterTest extends FieldKernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'file',
    'image',
  ];
  
  /**
   * @var string
   */
  protected $entityType;
  
  /**
   * @var string
   */
  protected $bundle;
  
  /**
   * @var string
   */
  protected $fieldName;
  
  /**
   * @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface
   */
  protected $display;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installConfig([
      'field',
    ]);
    $this->installEntitySchema('entity_test');
    $this->installEntitySchema('file');
    $this->installSchema('file', [
      'file_usage',
    ]);
    $this->entityType = 'entity_test';
    $this->bundle = $this->entityType;
    $this->fieldName = $this->randomMachineName();
    FieldStorageConfig::create([
      'entity_type' => $this->entityType,
      'field_name' => $this->fieldName,
      'type' => 'image',
      'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
    ])
      ->save();
    FieldConfig::create([
      'entity_type' => $this->entityType,
      'field_name' => $this->fieldName,
      'bundle' => $this->bundle,
      'settings' => [
        'file_extensions' => 'jpg',
      ],
    ])
      ->save();
    $this->display = \Drupal::service('entity_display.repository')->getViewDisplay($this->entityType, $this->bundle)
      ->setComponent($this->fieldName, [
      'type' => 'image',
      'label' => 'hidden',
    ]);
    $this->display
      ->save();
  }
  
  /**
   * Tests the cache tags from image formatters.
   */
  public function testImageFormatterCacheTags() : void {
    // Create a test entity with the image field set.
    $entity = EntityTest::create([
      'name' => $this->randomMachineName(),
    ]);
    $entity->{$this->fieldName}
      ->generateSampleItems(2);
    $entity->save();
    // Generate the render array to verify if the cache tags are as expected.
    $build = $this->display
      ->build($entity);
    $this->assertEquals($entity->{$this->fieldName}[0]->entity
      ->getCacheTags(), $build[$this->fieldName][0]['#cache']['tags'], 'First image cache tags is as expected');
    $this->assertEquals($entity->{$this->fieldName}[1]->entity
      ->getCacheTags(), $build[$this->fieldName][1]['#cache']['tags'], 'Second image cache tags is as expected');
  }
  
  /**
   * Tests ImageFormatter's handling of SVG images.
   */
  public function testImageFormatterSvg() : void {
    // Install the default image styles.
    $this->installConfig([
      'image',
    ]);
    /** @var \Drupal\Core\Render\RendererInterface $renderer */
    $renderer = $this->container
      ->get('renderer');
    $png = File::create([
      'uri' => 'public://test-image.png',
    ]);
    $png->save();
    // We need to create an actual empty PNG, or the GD toolkit will not
    // consider the image valid.
    $png_resource = imagecreate(300, 300);
    imagefill($png_resource, 0, 0, imagecolorallocate($png_resource, 0, 0, 0));
    imagepng($png_resource, $png->getFileUri());
    $svg = File::create([
      'uri' => 'public://test-image.svg',
    ]);
    $svg->save();
    // We don't have to put any real SVG data in here, because the GD toolkit
    // won't be able to load it anyway.
    touch($svg->getFileUri());
    $entity = EntityTest::create([
      'name' => $this->randomMachineName(),
      $this->fieldName => [
        $png,
        $svg,
      ],
    ]);
    $entity->save();
    // Ensure that the display is using the medium image style.
    $component = $this->display
      ->getComponent($this->fieldName);
    $component['settings']['image_style'] = 'medium';
    $this->display
      ->setComponent($this->fieldName, $component)
      ->save();
    $build = $this->display
      ->build($entity);
    // The first image is a PNG, so it is supported by the GD image toolkit.
    // The image style should be applied with its cache tags, image derivative
    // computed with its URI and dimensions.
    $this->assertCacheTags($build[$this->fieldName][0], ImageStyle::load('medium')->getCacheTags());
    $renderer->renderRoot($build[$this->fieldName][0]);
    $this->assertEquals('medium', $build[$this->fieldName][0]['#image_style']);
    // We check that the image URL contains the expected style directory
    // structure.
    $this->assertStringContainsString('styles/medium/public/test-image.png', (string) $build[$this->fieldName][0]['#markup']);
    $this->assertStringContainsString('width="220"', (string) $build[$this->fieldName][0]['#markup']);
    $this->assertStringContainsString('height="220"', (string) $build[$this->fieldName][0]['#markup']);
    // The second image is an SVG, which is not supported by the GD toolkit.
    // The image style should still be applied with its cache tags, but image
    // derivative will not be available so <img> tag will point to the original
    // image.
    $this->assertCacheTags($build[$this->fieldName][1], ImageStyle::load('medium')->getCacheTags());
    $renderer->renderRoot($build[$this->fieldName][1]);
    $this->assertEquals('medium', $build[$this->fieldName][1]['#image_style']);
    // We check that the image URL does not contain the style directory
    // structure.
    $this->assertStringNotContainsString('styles/medium/public/test-image.svg', (string) $build[$this->fieldName][1]['#markup']);
    // Since we did not store original image dimensions, width and height
    // HTML attributes will not be present.
    $this->assertStringNotContainsString('width', (string) $build[$this->fieldName][1]['#markup']);
    $this->assertStringNotContainsString('height', (string) $build[$this->fieldName][1]['#markup']);
  }
  
  /**
   * Tests Image Formatter URL options handling.
   */
  public function testImageFormatterUrlOptions() : void {
    $this->display
      ->setComponent($this->fieldName, [
      'settings' => [
        'image_link' => 'content',
      ],
    ]);
    // Create a test entity with the image field set.
    $entity = EntityTest::create([
      'name' => $this->randomMachineName(),
    ]);
    $entity->{$this->fieldName}
      ->generateSampleItems(2);
    $entity->save();
    // Generate the render array to verify URL options are as expected.
    $build = $this->display
      ->build($entity);
    $this->assertInstanceOf(Url::class, $build[$this->fieldName][0]['#url']);
    $build[$this->fieldName][0]['#url']
      ->setOption('attributes', [
      'data-attributes-test' => 'test123',
    ]);
    /** @var \Drupal\Core\Render\RendererInterface $renderer */
    $renderer = $this->container
      ->get('renderer');
    $output = $renderer->renderRoot($build[$this->fieldName][0]);
    $this->assertStringContainsString('<a href="' . $entity->toUrl()
      ->toString() . '" data-attributes-test="test123"', (string) $output);
  }
  
  /**
   * Asserts that a renderable array has a set of cache tags.
   *
   * @param array $renderable
   *   The renderable array. Must have a #cache[tags] element.
   * @param array $cache_tags
   *   The expected cache tags.
   *
   * @internal
   */
  protected function assertCacheTags(array $renderable, array $cache_tags) : void {
    $diff = array_diff($cache_tags, $renderable['#cache']['tags']);
    $this->assertEmpty($diff);
  }

}