class ImageFieldDisplayTest

class ImageFieldDisplayTest extends ImageFieldTestBase {
    use AssertPageCacheContextsAndTagsTrait;
    use TestFileCreationTrait {
        getTestFiles as drupalGetTestFiles;
        compareFiles as drupalCompareFiles;
    }
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests image formatters on node display for public files.
     */
    public function testImageFieldFormattersPublic() : void {
        $this->_testImageFieldFormatters('public');
    }
    
    /**
     * Tests image formatters on node display for private files.
     */
    public function testImageFieldFormattersPrivate() : void {
        // Remove access content permission from anonymous users.
        user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
            'access content' => FALSE,
        ]);
        $this->_testImageFieldFormatters('private');
    }
    
    /**
     * Tests image formatters on node display.
     */
    public function _testImageFieldFormatters($scheme) {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $field_name = $this->randomMachineName();
        $field_settings = [
            'alt_field_required' => 0,
        ];
        $instance = $this->createImageField($field_name, 'node', 'article', [
            'uri_scheme' => $scheme,
        ], $field_settings);
        // Go to manage display page.
        $this->drupalGet("admin/structure/types/manage/article/display");
        // Test for existence of link to image styles configuration.
        $this->submitForm([], "{$field_name}_settings_edit");
        $this->assertSession()
            ->linkByHrefExists(Url::fromRoute('entity.image_style.collection')->toString(), 0, 'Link to image styles configuration is found');
        // Remove 'administer image styles' permission from testing admin user.
        $admin_user_roles = $this->adminUser
            ->getRoles(TRUE);
        user_role_change_permissions(reset($admin_user_roles), [
            'administer image styles' => FALSE,
        ]);
        // Go to manage display page again.
        $this->drupalGet("admin/structure/types/manage/article/display");
        // Test for absence of link to image styles configuration.
        $this->submitForm([], "{$field_name}_settings_edit");
        $this->assertSession()
            ->linkByHrefNotExists(Url::fromRoute('entity.image_style.collection')->toString(), 'Link to image styles configuration is absent when permissions are insufficient');
        // Restore 'administer image styles' permission to testing admin user
        user_role_change_permissions(reset($admin_user_roles), [
            'administer image styles' => TRUE,
        ]);
        // Create a new node with an image attached.
        $test_image = current($this->drupalGetTestFiles('image'));
        // Ensure that preview works.
        $this->previewNodeImage($test_image, $field_name, 'article');
        // After previewing, make the alt field required. It cannot be required
        // during preview because the form validation will fail.
        $instance->setSetting('alt_field_required', 1);
        $instance->save();
        // Create alt text for the image.
        $alt = $this->randomMachineName();
        // Save node.
        $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $alt);
        $node_storage->resetCache([
            $nid,
        ]);
        $node = $node_storage->load($nid);
        // Test that the default formatter is being used.
        
        /** @var \Drupal\file\FileInterface $file */
        $file = $node->{$field_name}->entity;
        $image_uri = $file->getFileUri();
        $image = [
            '#theme' => 'image',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->assertSession()
            ->responseContains($default_output);
        // Test the image linked to file formatter.
        $display_options = [
            'type' => 'image',
            'settings' => [
                'image_link' => 'file',
            ],
        ];
        $display = \Drupal::service('entity_display.repository')->getViewDisplay('node', $node->getType());
        $display->setComponent($field_name, $display_options)
            ->save();
        $image = [
            '#theme' => 'image',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = '<a href="' . $file->createFileUrl() . '">' . (string) $renderer->renderRoot($image) . '</a>';
        $this->drupalGet('node/' . $nid);
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $file->getCacheTags()[0]);
        // @todo Remove in https://www.drupal.org/node/2646744.
        $this->assertCacheContext('url.site');
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        $this->assertSession()
            ->responseContains($default_output);
        // Verify that the image can be downloaded.
        $this->assertEquals(file_get_contents($test_image->uri), $this->drupalGet($file->createFileUrl(FALSE)), 'File was downloaded successfully.');
        if ($scheme == 'private') {
            // Only verify HTTP headers when using private scheme and the headers are
            // sent by Drupal.
            $this->assertSession()
                ->responseHeaderEquals('Content-Type', 'image/png');
            $this->assertSession()
                ->responseHeaderContains('Cache-Control', 'private');
            // Log out and ensure the file cannot be accessed.
            $this->drupalLogout();
            $this->drupalGet($file->createFileUrl(FALSE));
            $this->assertSession()
                ->statusCodeEquals(403);
            // Log in again.
            $this->drupalLogin($this->adminUser);
        }
        // Test the image linked to content formatter.
        $display_options['settings']['image_link'] = 'content';
        $display->setComponent($field_name, $display_options)
            ->save();
        $image = [
            '#theme' => 'image',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
        ];
        $this->drupalGet('node/' . $nid);
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $file->getCacheTags()[0]);
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        $this->assertSession()
            ->elementsCount('xpath', '//a[@href="' . $node->toUrl()
            ->toString() . '"]/img[@src="' . $file->createFileUrl() . '" and @alt="' . $alt . '" and @width="' . $image['#width'] . '" and @height="' . $image['#height'] . '"]', 1);
        // Test the image style 'thumbnail' formatter.
        $display_options['settings']['image_link'] = '';
        $display_options['settings']['image_style'] = 'thumbnail';
        $display->setComponent($field_name, $display_options)
            ->save();
        // Ensure the derivative image is generated so we do not have to deal with
        // image style callback paths.
        $this->drupalGet(ImageStyle::load('thumbnail')->buildUrl($image_uri));
        $image_style = [
            '#theme' => 'image_style',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#style_name' => 'thumbnail',
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = (string) $renderer->renderRoot($image_style);
        $this->drupalGet('node/' . $nid);
        $image_style = ImageStyle::load('thumbnail');
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $image_style->getCacheTags()[0]);
        $this->assertSession()
            ->responseContains($default_output);
        if ($scheme == 'private') {
            // Log out and ensure the file cannot be accessed.
            $this->drupalLogout();
            $this->drupalGet(ImageStyle::load('thumbnail')->buildUrl($image_uri));
            $this->assertSession()
                ->statusCodeEquals(403);
            // Log in again.
            $this->drupalLogin($this->adminUser);
        }
        // Test the image URL formatter without an image style.
        $display_options = [
            'type' => 'image_url',
            'settings' => [
                'image_style' => '',
            ],
        ];
        $expected_url = $file->createFileUrl();
        $this->assertEquals($expected_url, $node->{$field_name}
            ->view($display_options)[0]['#markup']);
        // Test the image URL formatter with an image style.
        $display_options['settings']['image_style'] = 'thumbnail';
        $expected_url = \Drupal::service('file_url_generator')->transformRelative(ImageStyle::load('thumbnail')->buildUrl($image_uri));
        $this->assertEquals($expected_url, $node->{$field_name}
            ->view($display_options)[0]['#markup']);
        // Test the settings summary.
        $display_options = [
            'type' => 'image_url',
            'settings' => [
                'image_style' => 'thumbnail',
            ],
        ];
        $display = \Drupal::service('entity_display.repository')->getViewDisplay('node', $node->getType(), 'default');
        $display->setComponent($field_name, $display_options)
            ->save();
        $this->drupalGet("admin/structure/types/manage/" . $node->getType() . "/display");
        $this->assertSession()
            ->responseContains('Image style: Thumbnail (100×100)');
    }
    
    /**
     * Tests for image field settings.
     */
    public function testImageFieldSettings() : void {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $test_image = current($this->drupalGetTestFiles('image'));
        [
            ,
            $test_image_extension,
        ] = explode('.', $test_image->filename);
        $field_name = $this->randomMachineName();
        $field_settings = [
            'alt_field' => 1,
            'file_extensions' => $test_image_extension,
            'max_filesize' => '50 KB',
            'max_resolution' => '100x100',
            'min_resolution' => '10x10',
            'title_field' => 1,
        ];
        $widget_settings = [
            'preview_image_style' => 'medium',
        ];
        $field = $this->createImageField($field_name, 'node', 'article', [], $field_settings, $widget_settings);
        // Verify that the min/max dimensions set on the field are properly
        // extracted, and displayed, on the image field's configuration form.
        $this->drupalGet('admin/structure/types/manage/article/fields/' . $field->id());
        $this->assertSession()
            ->fieldValueEquals('settings[max_resolution][x]', '100');
        $this->assertSession()
            ->fieldValueEquals('settings[max_resolution][y]', '100');
        $this->assertSession()
            ->fieldValueEquals('settings[min_resolution][x]', '10');
        $this->assertSession()
            ->fieldValueEquals('settings[min_resolution][y]', '10');
        $this->drupalGet('node/add/article');
        $this->assertSession()
            ->pageTextContains('50 KB limit.');
        $this->assertSession()
            ->pageTextContains('Allowed types: ' . $test_image_extension . '.');
        $this->assertSession()
            ->pageTextContains('Images must be larger than 10x10 pixels. Images larger than 100x100 pixels will be resized.');
        // We have to create the article first and then edit it because the alt
        // and title fields do not display until the image has been attached.
        // Create alt text for the image.
        $alt = $this->randomMachineName();
        $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $alt);
        $this->drupalGet('node/' . $nid . '/edit');
        // Verify that the optional fields alt & title are saved & filled.
        $this->assertSession()
            ->fieldValueEquals($field_name . '[0][alt]', $alt);
        $this->assertSession()
            ->fieldValueEquals($field_name . '[0][title]', '');
        // Verify that the attached image is being previewed using the 'medium'
        // style.
        $node_storage->resetCache([
            $nid,
        ]);
        $node = $node_storage->load($nid);
        $file = $node->{$field_name}->entity;
        $file_url_generator = \Drupal::service('file_url_generator');
        $url = $file_url_generator->transformRelative(ImageStyle::load('medium')->buildUrl($file->getFileUri()));
        $this->assertSession()
            ->elementExists('css', 'img[width=40][height=20][src="' . $url . '"]');
        // Add alt/title fields to the image and verify that they are displayed.
        $image = [
            '#theme' => 'image',
            '#uri' => $file->getFileUri(),
            '#alt' => $alt,
            '#title' => $this->randomMachineName(),
            '#width' => 40,
            '#height' => 20,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $edit = [
            $field_name . '[0][alt]' => $image['#alt'],
            $field_name . '[0][title]' => $image['#title'],
        ];
        $this->drupalGet('node/' . $nid . '/edit');
        $this->submitForm($edit, 'Save');
        $default_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->assertSession()
            ->responseContains($default_output);
        // Verify that alt/title longer than allowed results in a validation error.
        $test_size = 2000;
        $edit = [
            $field_name . '[0][alt]' => $this->randomMachineName($test_size),
            $field_name . '[0][title]' => $this->randomMachineName($test_size),
        ];
        $this->drupalGet('node/' . $nid . '/edit');
        $this->submitForm($edit, 'Save');
        $schema = $field->getFieldStorageDefinition()
            ->getSchema();
        $this->assertSession()
            ->statusMessageContains("Alternative text cannot be longer than {$schema['columns']['alt']['length']} characters but is currently {$test_size} characters long.", 'error');
        $this->assertSession()
            ->statusMessageContains("Title cannot be longer than {$schema['columns']['title']['length']} characters but is currently {$test_size} characters long.", 'error');
        // Set cardinality to unlimited and add upload a second image.
        // The image widget is extending on the file widget, but the image field
        // type does not have the 'display_field' setting which is expected by
        // the file widget. This resulted in notices before when cardinality is not
        // 1, so we need to make sure the file widget prevents these notices by
        // providing all settings, even if they are not used.
        // @see FileWidget::formMultipleElements().
        $this->drupalGet('admin/structure/types/manage/article/fields/node.article.' . $field_name);
        $this->submitForm([
            'field_storage[subform][cardinality]' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ], 'Save');
        $edit = [
            'files[' . $field_name . '_1][]' => \Drupal::service('file_system')->realpath($test_image->uri),
        ];
        $this->drupalGet('node/' . $node->id() . '/edit');
        $this->submitForm($edit, 'Save');
        // Add the required alt text.
        $this->submitForm([
            $field_name . '[1][alt]' => $alt,
        ], 'Save');
        $this->assertSession()
            ->statusMessageContains('Article ' . $node->getTitle() . ' has been updated.', 'status');
        // Assert ImageWidget::process() calls FieldWidget::process().
        $this->drupalGet('node/' . $node->id() . '/edit');
        $edit = [
            'files[' . $field_name . '_2][]' => \Drupal::service('file_system')->realpath($test_image->uri),
        ];
        $this->submitForm($edit, $field_name . '_2_upload_button');
        $this->assertSession()
            ->elementNotExists('css', 'input[name="files[' . $field_name . '_2][]"]');
        $this->assertSession()
            ->elementExists('css', 'input[name="files[' . $field_name . '_3][]"]');
    }
    
    /**
     * Tests for image loading attribute settings.
     */
    public function testImageLoadingAttribute() : void {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $field_name = $this->randomMachineName();
        $field_settings = [
            'alt_field_required' => 0,
        ];
        $instance = $this->createImageField($field_name, 'node', 'article', [], $field_settings);
        // Go to manage display page.
        $this->drupalGet("admin/structure/types/manage/article/display");
        // Test for existence of link to image styles configuration.
        $this->submitForm([], "{$field_name}_settings_edit");
        $this->assertSession()
            ->linkByHrefExists(Url::fromRoute('entity.image_style.collection')->toString(), 0, 'Link to image styles configuration is found');
        // Remove 'administer image styles' permission from testing admin user.
        $admin_user_roles = $this->adminUser
            ->getRoles(TRUE);
        user_role_change_permissions(reset($admin_user_roles), [
            'administer image styles' => FALSE,
        ]);
        // Go to manage display page again.
        $this->drupalGet("admin/structure/types/manage/article/display");
        // Test for absence of link to image styles configuration.
        $this->submitForm([], "{$field_name}_settings_edit");
        $this->assertSession()
            ->linkByHrefNotExists(Url::fromRoute('entity.image_style.collection')->toString(), 'Link to image styles configuration is absent when permissions are insufficient');
        // Restore 'administer image styles' permission to testing admin user
        user_role_change_permissions(reset($admin_user_roles), [
            'administer image styles' => TRUE,
        ]);
        // Create a new node with an image attached.
        $test_image = current($this->drupalGetTestFiles('image'));
        // Ensure that preview works.
        $this->previewNodeImage($test_image, $field_name, 'article');
        // After previewing, make the alt field required. It cannot be required
        // during preview because the form validation will fail.
        $instance->setSetting('alt_field_required', 1);
        $instance->save();
        // Create alt text for the image.
        $alt = $this->randomMachineName();
        // Save node.
        $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $alt);
        $node_storage->resetCache([
            $nid,
        ]);
        $node = $node_storage->load($nid);
        // Test that the default image loading attribute is being used.
        
        /** @var \Drupal\file\FileInterface $file */
        $file = $node->{$field_name}->entity;
        $image_uri = $file->getFileUri();
        $image = [
            '#theme' => 'image',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->assertSession()
            ->responseContains($default_output);
        // Test overrides of image loading attribute.
        $display_options = [
            'type' => 'image',
            'settings' => [
                'image_link' => '',
                'image_style' => '',
                'image_loading' => [
                    'attribute' => 'eager',
                ],
            ],
        ];
        $display = \Drupal::service('entity_display.repository')->getViewDisplay('node', $node->getType());
        $display->setComponent($field_name, $display_options)
            ->save();
        $image = [
            '#theme' => 'image',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'eager',
            ],
        ];
        $default_output = (string) $renderer->renderRoot($image);
        $this->drupalGet('node/' . $nid);
        $this->assertSession()
            ->responseContains($default_output);
        // Test the image loading "priority" formatter works together with "image_style".
        $display_options['settings']['image_style'] = 'thumbnail';
        $display->setComponent($field_name, $display_options)
            ->save();
        // Ensure the derivative image is generated so we do not have to deal with
        // image style callback paths.
        $this->drupalGet(ImageStyle::load('thumbnail')->buildUrl($image_uri));
        $image_style = [
            '#theme' => 'image_style',
            '#uri' => $image_uri,
            '#width' => 40,
            '#height' => 20,
            '#style_name' => 'thumbnail',
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'eager',
            ],
        ];
        $default_output = (string) $renderer->renderRoot($image_style);
        $this->drupalGet('node/' . $nid);
        $this->assertSession()
            ->responseContains($default_output);
    }
    
    /**
     * Tests use of a default image with an image field.
     */
    public function testImageFieldDefaultImage() : void {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        // Create a new image field.
        $field_name = $this->randomMachineName();
        $this->createImageField($field_name, 'node', 'article');
        // Create a new node, with no images and verify that no images are
        // displayed.
        $node = $this->drupalCreateNode([
            'type' => 'article',
        ]);
        $this->drupalGet('node/' . $node->id());
        // Verify that no image is displayed on the page by checking for the class
        // that would be used on the image field.
        $this->assertSession()
            ->responseNotMatches('<div class="(.*?)field--name-' . strtr($field_name, '_', '-') . '(.*?)">');
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        // Add a default image to the public image field.
        $images = $this->drupalGetTestFiles('image');
        $alt = $this->randomString(512);
        $title = $this->randomString(1024);
        $edit = [
            // Get the path of the 'image-test.png' file.
'files[field_storage_subform_settings_default_image_uuid]' => \Drupal::service('file_system')->realpath($images[0]->uri),
            'field_storage[subform][settings][default_image][alt]' => $alt,
            'field_storage[subform][settings][default_image][title]' => $title,
        ];
        $this->drupalGet("admin/structure/types/manage/article/fields/node.article.{$field_name}");
        $this->submitForm($edit, 'Save');
        // Clear field definition cache so the new default image is detected.
        \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        $field_storage = FieldStorageConfig::loadByName('node', $field_name);
        $default_image = $field_storage->getSetting('default_image');
        $file = \Drupal::service('entity.repository')->loadEntityByUuid('file', $default_image['uuid']);
        $this->assertTrue($file->isPermanent(), 'The default image status is permanent.');
        $image = [
            '#theme' => 'image',
            '#uri' => $file->getFileUri(),
            '#alt' => $alt,
            '#title' => $title,
            '#width' => 40,
            '#height' => 20,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->drupalGet('node/' . $node->id());
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $file->getCacheTags()[0]);
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        $this->assertSession()
            ->responseContains($default_output);
        // Create a node with an image attached and ensure that the default image
        // is not displayed.
        // Create alt text for the image.
        $alt = $this->randomMachineName();
        // Upload the 'image-test.gif' file.
        $nid = $this->uploadNodeImage($images[2], $field_name, 'article', $alt);
        $node_storage->resetCache([
            $nid,
        ]);
        $node = $node_storage->load($nid);
        $file = $node->{$field_name}->entity;
        $image = [
            '#theme' => 'image',
            '#uri' => $file->getFileUri(),
            '#width' => 40,
            '#height' => 20,
            '#alt' => $alt,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $image_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->drupalGet('node/' . $nid);
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $file->getCacheTags()[0]);
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        // Default image should not be displayed.
        $this->assertSession()
            ->responseNotContains($default_output);
        // User supplied image should be displayed.
        $this->assertSession()
            ->responseContains($image_output);
        // Remove default image from the field and make sure it is no longer used.
        // Can't use fillField cause Mink can't fill hidden fields.
        $this->drupalGet("admin/structure/types/manage/article/fields/node.article.{$field_name}");
        $this->getSession()
            ->getPage()
            ->find('css', 'input[name="field_storage[subform][settings][default_image][uuid][fids]"]')
            ->setValue(0);
        $this->getSession()
            ->getPage()
            ->pressButton('Save');
        // Clear field definition cache so the new default image is detected.
        \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        $field_storage = FieldStorageConfig::loadByName('node', $field_name);
        $default_image = $field_storage->getSetting('default_image');
        $this->assertEmpty($default_image['uuid'], 'Default image removed from field.');
        // Create an image field that uses the private:// scheme and test that the
        // default image works as expected.
        $private_field_name = $this->randomMachineName();
        $this->createImageField($private_field_name, 'node', 'article', [
            'uri_scheme' => 'private',
        ]);
        // Add a default image to the new field.
        $edit = [
            // Get the path of the 'image-test.gif' file.
'files[field_storage_subform_settings_default_image_uuid]' => \Drupal::service('file_system')->realpath($images[2]->uri),
            'field_storage[subform][settings][default_image][alt]' => $alt,
            'field_storage[subform][settings][default_image][title]' => $title,
        ];
        $this->drupalGet('admin/structure/types/manage/article/fields/node.article.' . $private_field_name);
        $this->submitForm($edit, 'Save');
        // Clear field definition cache so the new default image is detected.
        \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        $private_field_storage = FieldStorageConfig::loadByName('node', $private_field_name);
        $default_image = $private_field_storage->getSetting('default_image');
        $file = \Drupal::service('entity.repository')->loadEntityByUuid('file', $default_image['uuid']);
        $this->assertEquals('private', StreamWrapperManager::getScheme($file->getFileUri()), 'Default image uses private:// scheme.');
        $this->assertTrue($file->isPermanent(), 'The default image status is permanent.');
        // Create a new node with no image attached and ensure that default private
        // image is displayed.
        $node = $this->drupalCreateNode([
            'type' => 'article',
        ]);
        $image = [
            '#theme' => 'image',
            '#uri' => $file->getFileUri(),
            '#alt' => $alt,
            '#title' => $title,
            '#width' => 40,
            '#height' => 20,
            '#attributes' => [
                'loading' => 'lazy',
            ],
        ];
        $default_output = str_replace("\n", '', (string) $renderer->renderRoot($image));
        $this->drupalGet('node/' . $node->id());
        $this->assertSession()
            ->responseHeaderContains('X-Drupal-Cache-Tags', $file->getCacheTags()[0]);
        // Verify that no image style cache tags are found.
        $this->assertSession()
            ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'image_style:');
        // Default private image should be displayed when no user supplied image
        // is present.
        $this->assertSession()
            ->responseContains($default_output);
    }

}