ImageExampleTest.php

<?php

namespace Drupal\Tests\image_example\Functional;

use Drupal\Core\File\FileExists;
use Drupal\image\Entity\ImageStyle;
use Drupal\Tests\BrowserTestBase;

/**
 * Functional tests for the Image Example module.
 *
 * @group image_example
 * @group examples
 *
 * @ingroup image_example
 */
class ImageExampleTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'image',
        'image_example',
    ];
    
    /**
     * Tests the Colorize image effect.
     */
    public function testColorizeImageEffect() {
        // Create the test image style with a Colorize effect.
        $image_style = ImageStyle::create([
            'name' => 'image_example_test',
            'label' => 'Image Example Test',
        ]);
        $this->assertEquals(SAVED_NEW, $image_style->save());
        $image_style->addImageEffect([
            'id' => 'image_example_colorize',
            'weight' => 0,
            'data' => [
                // Colorize the image in emerald.
'color' => '#50CD6F',
            ],
        ]);
        $this->assertEquals(SAVED_UPDATED, $image_style->save());
        // Create a copy of a test image file in root.
        $test_uri = 'public://image-test-colorize-image-effect.png';
        \Drupal::service('file_system')->copy('core/tests/fixtures/files/image-test.png', $test_uri, FileExists::Replace);
        $this->assertFileExists($test_uri);
        // Execute the image style on the test image via a GET request.
        $derivative_uri = 'public://styles/image_example_test/public/image-test-colorize-image-effect.png';
        $this->assertFileDoesNotExist($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);
    }

}