class ImageThemeFunctionTest

class ImageThemeFunctionTest extends KernelTestBase {
    use TestFileCreationTrait {
        getTestFiles as drupalGetTestFiles;
        compareFiles as drupalCompareFiles;
    }
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'entity_test',
        'field',
        'file',
        'image',
        'system',
        'user',
    ];
    
    /**
     * Created file entity.
     *
     * @var \Drupal\file\Entity\File
     */
    protected $image;
    
    /**
     * @var \Drupal\Core\Image\ImageFactory
     */
    protected $imageFactory;
    protected function setUp() {
        parent::setUp();
        $this->installEntitySchema('entity_test');
        $this->installEntitySchema('file');
        $this->installSchema('file', [
            'file_usage',
        ]);
        $this->installEntitySchema('user');
        FieldStorageConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => 'image_test',
            'type' => 'image',
            'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ])->save();
        FieldConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => 'image_test',
            'bundle' => 'entity_test',
        ])->save();
        \Drupal::service('file_system')->copy($this->root . '/core/misc/druplicon.png', 'public://example.jpg');
        $this->image = File::create([
            'uri' => 'public://example.jpg',
        ]);
        $this->image
            ->save();
        $this->imageFactory = $this->container
            ->get('image.factory');
    }
    
    /**
     * Tests usage of the image field formatters.
     */
    public function testImageFormatterTheme() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        // Create an image.
        $files = $this->drupalGetTestFiles('image');
        $file = reset($files);
        $original_uri = \Drupal::service('file_system')->copy($file->uri, 'public://', FileSystemInterface::EXISTS_RENAME);
        // Create a style.
        $style = ImageStyle::create([
            'name' => 'test',
            'label' => 'Test',
        ]);
        $style->save();
        $url = file_url_transform_relative($style->buildUrl($original_uri));
        // Create a test entity with the image field set.
        $entity = EntityTest::create();
        $entity->image_test->target_id = $this->image
            ->id();
        $entity->image_test->alt = NULL;
        $entity->image_test->uri = $original_uri;
        $image = $this->imageFactory
            ->get('public://example.jpg');
        $entity->save();
        // Create the base element that we'll use in the tests below.
        $path = $this->randomMachineName();
        $base_element = [
            '#theme' => 'image_formatter',
            '#image_style' => 'test',
            '#item' => $entity->image_test,
            '#url' => Url::fromUri('base:' . $path),
        ];
        // Test using theme_image_formatter() with a NULL value for the alt option.
        $element = $base_element;
        $this->setRawContent($renderer->renderRoot($element));
        $elements = $this->xpath('//a[@href=:path]/img[@src=:url and @width=:width and @height=:height]', [
            ':path' => base_path() . $path,
            ':url' => $url,
            ':width' => $image->getWidth(),
            ':height' => $image->getHeight(),
        ]);
        $this->assertCount(1, $elements, 'theme_image_formatter() correctly renders with a NULL value for the alt option.');
        // Test using theme_image_formatter() without an image title, alt text, or
        // link options.
        $element = $base_element;
        $element['#item']->alt = '';
        $this->setRawContent($renderer->renderRoot($element));
        $elements = $this->xpath('//a[@href=:path]/img[@src=:url and @width=:width and @height=:height and @alt=""]', [
            ':path' => base_path() . $path,
            ':url' => $url,
            ':width' => $image->getWidth(),
            ':height' => $image->getHeight(),
        ]);
        $this->assertCount(1, $elements, 'theme_image_formatter() correctly renders without title, alt, or path options.');
        // Link the image to a fragment on the page, and not a full URL.
        $fragment = $this->randomMachineName();
        $element = $base_element;
        $element['#url'] = Url::fromRoute('<none>', [], [
            'fragment' => $fragment,
        ]);
        $this->setRawContent($renderer->renderRoot($element));
        $elements = $this->xpath('//a[@href=:fragment]/img[@src=:url and @width=:width and @height=:height and @alt=""]', [
            ':fragment' => '#' . $fragment,
            ':url' => $url,
            ':width' => $image->getWidth(),
            ':height' => $image->getHeight(),
        ]);
        $this->assertCount(1, $elements, 'theme_image_formatter() correctly renders a link fragment.');
    }
    
    /**
     * Tests usage of the image style theme function.
     */
    public function testImageStyleTheme() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        // Create an image.
        $files = $this->drupalGetTestFiles('image');
        $file = reset($files);
        $original_uri = \Drupal::service('file_system')->copy($file->uri, 'public://', FileSystemInterface::EXISTS_RENAME);
        // Create a style.
        $style = ImageStyle::create([
            'name' => 'image_test',
            'label' => 'Test',
        ]);
        $style->save();
        $url = file_url_transform_relative($style->buildUrl($original_uri));
        // Create the base element that we'll use in the tests below.
        $base_element = [
            '#theme' => 'image_style',
            '#style_name' => 'image_test',
            '#uri' => $original_uri,
        ];
        $element = $base_element;
        $this->setRawContent($renderer->renderRoot($element));
        $elements = $this->xpath('//img[@src=:url and @alt=""]', [
            ':url' => $url,
        ]);
        $this->assertCount(1, $elements, 'theme_image_style() renders an image correctly.');
        // Test using theme_image_style() with a NULL value for the alt option.
        $element = $base_element;
        $element['#alt'] = NULL;
        $this->setRawContent($renderer->renderRoot($element));
        $elements = $this->xpath('//img[@src=:url]', [
            ':url' => $url,
        ]);
        $this->assertCount(1, $elements, 'theme_image_style() renders an image correctly with a NULL value for the alt option.');
    }
    
    /**
     * Tests image alt attribute functionality.
     */
    public function testImageAltFunctionality() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        // Test using alt directly with alt attribute.
        $image_with_alt_property = [
            '#theme' => 'image',
            '#uri' => '/core/themes/bartik/logo.svg',
            '#alt' => 'Regular alt',
            '#title' => 'Test title',
            '#width' => '50%',
            '#height' => '50%',
            '#attributes' => [
                'class' => 'image-with-regular-alt',
                'id' => 'my-img',
            ],
        ];
        $this->setRawContent($renderer->renderRoot($image_with_alt_property));
        $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [
            ":class" => "image-with-regular-alt",
            ":alt" => "Regular alt",
        ]);
        $this->assertCount(1, $elements, 'Regular alt displays correctly');
        // Test using alt attribute inside attributes.
        $image_with_alt_attribute_alt_attribute = [
            '#theme' => 'image',
            '#uri' => '/core/themes/bartik/logo.svg',
            '#width' => '50%',
            '#height' => '50%',
            '#attributes' => [
                'class' => 'image-with-attribute-alt',
                'id' => 'my-img',
                'title' => 'New test title',
                'alt' => 'Attribute alt',
            ],
        ];
        $this->setRawContent($renderer->renderRoot($image_with_alt_attribute_alt_attribute));
        $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [
            ":class" => "image-with-attribute-alt",
            ":alt" => "Attribute alt",
        ]);
        $this->assertCount(1, $elements, 'Attribute alt displays correctly');
        // Test using alt attribute as property and inside attributes.
        $image_with_alt_attribute_both = [
            '#theme' => 'image',
            '#uri' => '/core/themes/bartik/logo.svg',
            '#width' => '50%',
            '#height' => '50%',
            '#alt' => 'Kitten sustainable',
            '#attributes' => [
                'class' => 'image-with-attribute-alt',
                'id' => 'my-img',
                'title' => 'New test title',
                'alt' => 'Attribute alt',
            ],
        ];
        $this->setRawContent($renderer->renderRoot($image_with_alt_attribute_both));
        $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [
            ":class" => "image-with-attribute-alt",
            ":alt" => "Attribute alt",
        ]);
        $this->assertCount(1, $elements, 'Attribute alt overrides alt property if both set.');
    }

}