class ConvertTest

class ConvertTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'image',
  ];
  
  /**
   * Tests that files stored in the root folder are converted properly.
   */
  public function testConvertFileInRoot() {
    // Create the test image style with a Convert effect.
    $image_style = ImageStyle::create([
      'name' => 'image_effect_test',
      'label' => 'Image Effect Test',
    ]);
    $this->assertEquals(SAVED_NEW, $image_style->save());
    $image_style->addImageEffect([
      'id' => 'image_convert',
      'data' => [
        'extension' => 'jpeg',
      ],
    ]);
    $this->assertEquals(SAVED_UPDATED, $image_style->save());
    // Create a copy of a test image file in root.
    $test_uri = 'public://image-test-do.png';
    \Drupal::service('file_system')->copy('core/tests/fixtures/files/image-test.png', $test_uri, FileSystemInterface::EXISTS_REPLACE);
    $this->assertFileExists($test_uri);
    // Execute the image style on the test image via a GET request.
    $derivative_uri = 'public://styles/image_effect_test/public/image-test-do.png.jpeg';
    $this->assertFileDoesNotExist($derivative_uri);
    $url = \Drupal::service('file_url_generator')->transformRelative($image_style->buildUrl($test_uri));
    $this->drupalGet($this->getAbsoluteUrl($url));
    $this->assertSession()
      ->statusCodeEquals(200);
    $this->assertFileExists($derivative_uri);
  }

}