FileNameLengthConstraintValidatorTest.php

<?php

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

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

/**
 * Tests the FileNameLengthConstraintValidator.
 *
 * @group file
 * @coversDefaultClass \Drupal\file\Plugin\Validation\Constraint\FileNameLengthConstraintValidator
 */
class FileNameLengthConstraintValidatorTest extends FileValidatorTestBase {
    
    /**
     * This will ensure the filename length is valid.
     *
     * @covers ::validate
     */
    public function testFileValidateNameLength() : void {
        // Create a new file entity.
        $file = File::create();
        // Add a filename with an allowed length and test it.
        $file->setFilename(str_repeat('x', 240));
        $this->assertEquals(240, strlen($file->getFilename()));
        $validators = [
            'FileNameLength' => [],
        ];
        $violations = $this->validator
            ->validate($file, $validators);
        $this->assertCount(0, $violations, 'No errors reported for 240 length filename.');
        // Add a filename with a length too long and test it.
        $file->setFilename(str_repeat('x', 241));
        $violations = $this->validator
            ->validate($file, $validators);
        $this->assertCount(1, $violations, 'An error reported for 241 length filename.');
        // Add a filename with an empty string and test it.
        $file->setFilename('');
        $violations = $this->validator
            ->validate($file, $validators);
        $this->assertCount(1, $violations, 'An error reported for 0 length filename.');
    }

}