class InstallTranslationFilePatternTest

class InstallTranslationFilePatternTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'system',
  ];
  
  /**
   * @var \Drupal\Core\StringTranslation\Translator\FileTranslation
   */
  protected $fileTranslation;
  
  /**
   * @var \ReflectionMethod
   */
  protected $filePatternMethod;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->fileTranslation = new FileTranslation('filename', $this->container
      ->get('file_system'));
    $method = new \ReflectionMethod('\\Drupal\\Core\\StringTranslation\\Translator\\FileTranslation', 'getTranslationFilesPattern');
    $method->setAccessible(TRUE);
    $this->filePatternMethod = $method;
  }
  
  /**
   * @dataProvider providerValidTranslationFiles
   */
  public function testFilesPatternValid($langcode, $filename) {
    $pattern = $this->filePatternMethod
      ->invoke($this->fileTranslation, $langcode);
    $this->assertNotEmpty(preg_match($pattern, $filename));
  }
  
  /**
   * @return array
   */
  public function providerValidTranslationFiles() {
    return [
      [
        'hu',
        'drupal-8.0.0-alpha1.hu.po',
      ],
      [
        'ta',
        'drupal-8.10.10-beta12.ta.po',
      ],
      [
        'hi',
        'drupal-8.0.0.hi.po',
      ],
    ];
  }
  
  /**
   * @dataProvider providerInvalidTranslationFiles
   */
  public function testFilesPatternInvalid($langcode, $filename) {
    $pattern = $this->filePatternMethod
      ->invoke($this->fileTranslation, $langcode);
    $this->assertEmpty(preg_match($pattern, $filename));
  }
  
  /**
   * @return array
   */
  public function providerInvalidTranslationFiles() {
    return [
      [
        'hu',
        'drupal-alpha1-*-hu.po',
      ],
      [
        'ta',
        'drupal-beta12.ta',
      ],
      [
        'hi',
        'drupal-hi.po',
      ],
      [
        'de',
        'drupal-dummy-de.po',
      ],
      [
        'hu',
        'drupal-10.0.1.alpha1-hu.po',
      ],
    ];
  }

}