class PluginInstanceTest

class PluginInstanceTest extends ViewUnitTestBase {

  /**
   * All views plugin types.
   *
   * @var array
   */
  protected $pluginTypes = array(
    'access',
    'area',
    'argument',
    'argument_default',
    'argument_validator',
    'cache',
    'display_extender',
    'display',
    'exposed_form',
    'field',
    'filter',
    'join',
    'pager',
    'query',
    'relationship',
    'row',
    'sort',
    'style',
    'wizard',
  );

  /**
   * An array of plugin definitions, keyed by plugin type.
   *
   * @var array
   */
  protected $definitions;
  public static function getInfo() {
    return array(
      'name' => 'Plugin instantiation',
      'description' => 'Tests that an instance of all views plugins can be created.',
      'group' => 'Views',
    );
  }
  protected function setUp() {
    parent::setUp();
    $this->definitions = views_get_plugin_definitions();
  }

  /**
   * Confirms that there is plugin data for all views plugin types.
   */
  public function testPluginData() {

    // Check that we have an array of data.
    $this
      ->assertTrue(is_array($this->definitions), 'Plugin data is an array.');

    // Check all plugin types.
    foreach ($this->pluginTypes as $type) {
      $this
        ->assertTrue(array_key_exists($type, $this->definitions), format_string('Key for plugin type @type found.', array(
        '@type' => $type,
      )));
      $this
        ->assertTrue(is_array($this->definitions[$type]) && !empty($this->definitions[$type]), format_string('Plugin type @type has an array of plugins.', array(
        '@type' => $type,
      )));
    }

    // Tests that the plugin list has not missed any types.
    $diff = array_diff(array_keys($this->definitions), $this->pluginTypes);
    $this
      ->assertTrue(empty($diff), 'All plugins were found and matched.');
  }

  /**
   * Tests creating instances of every views plugin.
   *
   * This will iterate through all plugins from _views_fetch_plugin_data().
   */
  public function testPluginInstances() {
    $container = drupal_container();
    foreach ($this->definitions as $type => $plugins) {

      // Get a plugin manager for this type.
      $manager = $container
        ->get("plugin.manager.views.{$type}");
      foreach ($plugins as $id => $definition) {

        // Get a reflection class for this plugin.
        // We only want to test true plugins, i.e. They extend PluginBase.
        $reflection = new \ReflectionClass($definition['class']);
        if ($reflection
          ->isSubclassOf('Drupal\\views\\Plugin\\views\\PluginBase')) {

          // Create a plugin instance and check what it is. This is not just
          // good to check they can be created but for throwing any notices for
          // method signatures etc... too.
          $instance = $manager
            ->createInstance($id);
          $this
            ->assertTrue($instance instanceof $definition['class'], format_string('Instance of @type:@id created', array(
            '@type' => $type,
            '@id' => $id,
          )));
        }
      }
    }
  }

}