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<?php

namespace Drupal\Tests\views\Kernel\Plugin;

use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
use Drupal\views_test_data\Plugin\views\display_extender\DisplayExtenderTest as DisplayExtenderTestData;
use Drupal\views\Views;

/**
 * Tests the display extender plugins.
 *
 * @group views
 * @see \Drupal\views_test_data\Plugin\views\display_extender\DisplayExtenderTest
 */
class DisplayExtenderTest extends ViewsKernelTestBase {

  /**
   * Views used by this test.
   *
   * @var array
   */
  public static $testViews = ['test_view'];

  /**
   * Test display extenders.
   */
  public function testDisplayExtenders() {
    $this->config('views.settings')->set('display_extenders', ['display_extender_test'])->save();
    $this->assertEqual(count(Views::getEnabledDisplayExtenders()), 1, 'Make sure that there is only one enabled display extender.');

    $view = Views::getView('test_view');
    $view->initDisplay();

    $this->assertEqual(count($view->display_handler->getExtenders()), 1, 'Make sure that only one extender is initialized.');

    $display_extender = $view->display_handler->getExtenders()['display_extender_test'];
    $this->assertTrue($display_extender instanceof DisplayExtenderTestData, 'Make sure the right class got initialized.');

    $view->preExecute();
    $this->assertTrue($display_extender->testState['preExecute'], 'Make sure the display extender was able to react on preExecute.');
    $view->execute();
    $this->assertTrue($display_extender->testState['query'], 'Make sure the display extender was able to react on query.');
  }

  /**
   * Test display extenders validation.
   */
  public function testDisplayExtendersValidate() {
    $this->config('views.settings')->set('display_extenders', ['display_extender_test_3'])->save();

    $view = Views::getView('test_view');
    $errors = $view->validate();

    foreach ($view->displayHandlers as $id => $display) {
      $this->assertTrue(isset($errors[$id]) && in_array('Display extender test error.', $errors[$id]), format_string('Error message found for @id display', ['@id' => $id]));
    }
  }

}