class ImageFormatterTest

class ImageFormatterTest extends FieldKernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    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;
        $this->fieldName = mb_strtolower($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() {
        // 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.
     *
     * @requires extension gd
     */
    public function testImageFormatterSvg() {
        // 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', $build[$this->fieldName][0]['#markup']);
        $this->assertStringContainsString('width="220"', $build[$this->fieldName][0]['#markup']);
        $this->assertStringContainsString('height="220"', $build[$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', $build[$this->fieldName][1]['#markup']);
        // Since we did not store original image dimensions, width and height
        // HTML attributes will not be present.
        $this->assertStringNotContainsString('width', $build[$this->fieldName][1]['#markup']);
        $this->assertStringNotContainsString('height', $build[$this->fieldName][1]['#markup']);
    }
    
    /**
     * Tests Image Formatter URL options handling.
     */
    public function testImageFormatterUrlOptions() {
        $this->display
            ->setComponent($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);
    }

}