public function TwigEnvironmentTest::testTemplateInvalidation in Drupal 8

Same name and namespace in other branches

1. 9 core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php \Drupal\KernelTests\Core\Theme\TwigEnvironmentTest::testTemplateInvalidation()

Test template invalidation.

File

core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php, line 194

Class

TwigEnvironmentTest

Tests the twig environment.

Namespace

Drupal\KernelTests\Core\Theme

Code

public function testTemplateInvalidation() {
  $template_before = <<<TWIG
<div>Hello before</div>
TWIG;
  $template_after = <<<TWIG
<div>Hello after</div>
TWIG;
  $tempfile = tempnam(sys_get_temp_dir(), '__METHOD__') . '.html.twig';
  file_put_contents($tempfile, $template_before);

  /** @var \Drupal\Core\Template\TwigEnvironment $environment */
  $environment = \Drupal::service('twig');
  $output = $environment
    ->load(basename($tempfile))
    ->render();
  $this
    ->assertEquals($template_before, $output);
  file_put_contents($tempfile, $template_after);
  $output = $environment
    ->load(basename($tempfile))
    ->render();
  $this
    ->assertEquals($template_before, $output);
  $environment
    ->invalidate();

  // Manually change $templateClassPrefix to force a different template
  // classname, as the other class is still loaded. This wouldn't be a problem
  // on a real site where you reload the page.
  $reflection = new \ReflectionClass(\Twig_Environment::class);
  $property_reflection = $reflection
    ->getProperty('templateClassPrefix');
  $property_reflection
    ->setAccessible(TRUE);
  $property_reflection
    ->setValue($environment, 'otherPrefix');
  $output = $environment
    ->load(basename($tempfile))
    ->render();
  $this
    ->assertEquals($template_after, $output);
}