ConvertTest.php

<?php

namespace Drupal\Tests\image\Functional\ImageEffect;

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

/**
 * Tests for the Convert image effect.
 *
 * @group image
 */
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);
    }

}