class TranslationStringTest

class TranslationStringTest extends KernelTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'language',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    ConfigurableLanguage::createFromLangcode('de')->save();
  }
  
  /**
   * Tests that TranslatableMarkup objects can be compared.
   */
  public function testComparison() {
    $this->rebootAndPrepareSettings();
    $a = \Drupal::service('string_translation')->translate('Example @number', [
      '@number' => 42,
    ], [
      'langcode' => 'de',
    ]);
    $this->rebootAndPrepareSettings();
    $b = \Drupal::service('string_translation')->translate('Example @number', [
      '@number' => 42,
    ], [
      'langcode' => 'de',
    ]);
    $c = \Drupal::service('string_translation')->translate('Example @number', [
      '@number' => 43,
    ], [
      'langcode' => 'de',
    ]);
    $d = \Drupal::service('string_translation')->translate('Example @number', [
      '@number' => 42,
    ], [
      'langcode' => 'en',
    ]);
    // The two objects have the same settings so == comparison will work.
    $this->assertEquals($a, $b);
    // The two objects are not the same object.
    $this->assertNotSame($a, $b);
    // TranslatableMarkup which have different settings are not equal.
    $this->assertNotEquals($a, $c);
    $this->assertNotEquals($a, $d);
  }
  
  /**
   * Reboots the kernel to set custom translations in Settings.
   */
  protected function rebootAndPrepareSettings() {
    // Reboot the container so that different services are injected and the new
    // settings are picked.
    $kernel = $this->container
      ->get('kernel');
    $kernel->shutdown();
    $kernel->boot();
    $settings = Settings::getAll();
    $settings['locale_custom_strings_de'] = [
      '' => [
        'Example @number' => 'Example @number translated',
      ],
    ];
    // Recreate the settings static.
    new Settings($settings);
  }

}