class SystemFilesTest

class SystemFilesTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function prepareSettings() : void {
    parent::prepareSettings();
    // Allow info files to be accessed by the `module` and `theme` stream
    // wrappers.
    $services_file = $this->siteDirectory . '/services.yml';
    $this->assertFileExists($services_file);
    $services = file_get_contents($services_file);
    $services = Yaml::decode($services);
    $services['parameters']['stream_wrapper.allowed_file_extensions'] = [
      'module' => [
        'yml',
      ],
      'theme' => [
        'yml',
      ],
    ];
    file_put_contents($services_file, Yaml::encode($services));
  }
  
  /**
   * Test theme and module stream wrappers are not available via system.files route.
   */
  public function testExtensionStreamWrappers() : void {
    $path = 'system/system.info.yml';
    $this->assertFileExists('module://' . $path);
    $this->drupalGet('/system/files/module', [
      'query' => [
        'file' => $path,
      ],
    ]);
    $this->assertSession()
      ->statusCodeEquals(404);
    $this->drupalGet('/system/files/module/' . $path);
    $this->assertSession()
      ->statusCodeEquals(404);
    $path = 'stark/stark.info.yml';
    $this->assertFileExists('theme://' . $path);
    $this->drupalGet('/system/files/theme', [
      'query' => [
        'file' => $path,
      ],
    ]);
    $this->assertSession()
      ->statusCodeEquals(404);
    $this->drupalGet('/system/files/theme/' . $path);
    $this->assertSession()
      ->statusCodeEquals(404);
  }

}