class TwigExtensionTest

class TwigExtensionTest extends BrowserTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'theme_test',
    'twig_extension_test',
    'twig_theme_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    \Drupal::service('theme_installer')->install([
      'test_theme',
    ]);
  }
  
  /**
   * Tests that the provided Twig extension loads the service appropriately.
   */
  public function testTwigExtensionLoaded() {
    $twigService = \Drupal::service('twig');
    $ext = $twigService->getExtension(TestExtension::class);
    $this->assertInstanceOf(TestExtension::class, $ext);
  }
  
  /**
   * Tests that the Twig extension's filter produces expected output.
   */
  public function testTwigExtensionFilter() {
    $this->config('system.theme')
      ->set('default', 'test_theme')
      ->save();
    $this->drupalGet('twig-extension-test/filter');
    $this->assertSession()
      ->pageTextContains('Every plant is not a mineral.');
    // Test safe_join filter.
    $this->assertSession()
      ->responseContains('&lt;em&gt;will be escaped&lt;/em&gt;<br/><em>will be markup</em><br/><strong>will be rendered</strong>');
  }
  
  /**
   * Tests that the Twig extension's function produces expected output.
   */
  public function testTwigExtensionFunction() {
    $this->config('system.theme')
      ->set('default', 'test_theme')
      ->save();
    $this->drupalGet('twig-extension-test/function');
    $this->assertSession()
      ->pageTextContains('THE QUICK BROWN BOX JUMPS OVER THE LAZY DOG 123.');
    $this->assertSession()
      ->pageTextContains('the quick brown box jumps over the lazy dog 123.');
    $this->assertSession()
      ->pageTextNotContains('The Quick Brown Fox Jumps Over The Lazy Dog 123.');
  }
  
  /**
   * Tests output of integer and double 0 values of TwigExtension::escapeFilter().
   *
   * @see https://www.drupal.org/node/2417733
   */
  public function testsRenderEscapedZeroValue() {
    /** @var \Drupal\Core\Template\TwigExtension $extension */
    $extension = \Drupal::service('twig.extension');
    /** @var \Drupal\Core\Template\TwigEnvironment $twig */
    $twig = \Drupal::service('twig');
    $this->assertSame(0, $extension->escapeFilter($twig, 0), 'TwigExtension::escapeFilter() returns zero correctly when provided as an integer.');
    $this->assertSame(0, $extension->escapeFilter($twig, 0.0), 'TwigExtension::escapeFilter() returns zero correctly when provided as a double.');
  }
  
  /**
   * Tests output of integer and double 0 values of TwigExtension->renderVar().
   *
   * @see https://www.drupal.org/node/2417733
   */
  public function testsRenderZeroValue() {
    /** @var \Drupal\Core\Template\TwigExtension $extension */
    $extension = \Drupal::service('twig.extension');
    $this->assertSame(0, $extension->renderVar(0), 'TwigExtension::renderVar() renders zero correctly when provided as an integer.');
    $this->assertSame(0, $extension->renderVar(0.0), 'TwigExtension::renderVar() renders zero correctly when provided as a double.');
  }
  
  /**
   * Tests the dump function.
   */
  public function testDump() {
    // Test Twig Debug disabled.
    $this->drupalGet('/twig-theme-test/dump');
    $this->assertSession()
      ->elementsCount('css', '.sf-dump', 0);
    // Test Twig Debug enabled.
    $parameters = $this->container
      ->getParameter('twig.config');
    $parameters['debug'] = TRUE;
    $this->setContainerParameter('twig.config', $parameters);
    $this->resetAll();
    $this->drupalGet('/twig-theme-test/dump');
    $dumps = $this->getSession()
      ->getPage()
      ->findAll('css', '.sf-dump');
    $this->assertEquals(4, count($dumps));
    // Test dumping single variable.
    $this->assertStringContainsString('💩', $dumps[0]->getText());
    $this->assertStringNotContainsString('🐣', $dumps[0]->getText());
    // Test dumping context.
    $this->assertStringContainsString('"bar" => "🐣"', $dumps[1]->getText());
    // Test dump as a variadic.
    $this->assertStringContainsString('💩', $dumps[2]->getText());
    $this->assertStringContainsString('☄️', $dumps[3]->getText());
  }

}