function ImageThemeFunctionTest::testImageStyleTheme

Tests usage of the image style theme function.

File

core/modules/image/tests/src/Kernel/ImageThemeFunctionTest.php, line 149

Class

ImageThemeFunctionTest

Tests image theme functions.

Namespace

Code

public function testImageStyleTheme() : void {
  /** @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://', FileExists::Rename);
  // Create a style.
  $style = ImageStyle::create([
    'name' => 'image_test',
    'label' => 'Test',
  ]);
  $style->save();
  $url = \Drupal::service('file_url_generator')->transformRelative($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.');
}