FileIsImageConstraintValidatorTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\file\Kernel\Plugin\Validation\Constraint;

use Drupal\file\Entity\File;
use Drupal\file\FileInterface;
use Drupal\Tests\file\Kernel\Validation\FileValidatorTestBase;

/**
 * Tests the FileIsImageConstraintValidator.
 *
 * @group file
 * @coversDefaultClass \Drupal\file\Plugin\Validation\Constraint\FileIsImageConstraintValidator
 */
class FileIsImageConstraintValidatorTest extends FileValidatorTestBase {
    
    /**
     * An image file.
     *
     * @var \Drupal\file\FileInterface
     */
    protected FileInterface $image;
    
    /**
     * A file which is not an image.
     *
     * @var \Drupal\file\FileInterface
     */
    protected FileInterface $nonImage;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->image = File::create();
        $this->image
            ->setFileUri('core/misc/druplicon.png');
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $this->image
            ->setFilename($file_system->basename($this->image
            ->getFileUri()));
        $this->nonImage = File::create();
        $this->nonImage
            ->setFileUri('core/assets/vendor/jquery/jquery.min.js');
        $this->nonImage
            ->setFilename($file_system->basename($this->nonImage
            ->getFileUri()));
    }
    
    /**
     * This ensures a specific file is actually an image.
     *
     * @covers ::validate
     */
    public function testFileIsImage() : void {
        $this->assertFileExists($this->image
            ->getFileUri());
        $validators = [
            'FileIsImage' => [],
        ];
        $violations = $this->validator
            ->validate($this->image, $validators);
        $this->assertCount(0, $violations, 'No error reported for our image file.');
        $this->assertFileExists($this->nonImage
            ->getFileUri());
        $violations = $this->validator
            ->validate($this->nonImage, $validators);
        $this->assertCount(1, $violations, 'An error reported for our non-image file.');
    }

}