Issue #2947588 by mrinalini9, borisson_, shaktik, andypost, daffie, joachim,...

namespace Drupal\Tests\views\Kernel;

use Drupal\Component\Render\FormattableMarkup;

use Drupal\Core\Form\FormState;

use Drupal\views\Plugin\views\area\Broken as BrokenArea;

use Drupal\views\Plugin\views\field\Broken as BrokenField;

use Drupal\views\Plugin\views\filter\Broken as BrokenFilter;

use Drupal\views\Plugin\views\filter\Standard;

use Drupal\views\Views;

/**

 * Tests basic functions from the Views module.

 *

 * @group views

 */

use Drupal\views\Plugin\views\filter\Standard;

use Drupal\views\Views;

use Drupal\Component\Render\FormattableMarkup;

class ModuleTest extends ViewsKernelTestBase {

  /**

   * @see \Drupal\views\Plugin\ViewsHandlerManager::getHandler()

   */

  public function testViewsGetHandler() {

    $types = ['field', 'area', 'filter'];

    foreach ($types as $type) {

      $item = [

        'table' => $this->randomMachineName(),

        'field' => $this->randomMachineName(),

    $types = [

      'field' => BrokenField::class,

      'area' => BrokenArea::class,

      'filter' => BrokenFilter::class,

    ];

      $handler = $this->container->get('plugin.manager.views.' . $type)->getHandler($item);

      $this->assertEqual('Drupal\views\Plugin\views\\' . $type . '\Broken', get_class($handler), new FormattableMarkup('Make sure that a broken handler of type: @type is created.', ['@type' => $type]));

    // Test non-existent tables/fields.

    $items = [

      [

        'table' => 'table_invalid',

        'field' => 'id',

      ],

      [

        'table' => 'views_test_data',

        'field' => 'field_invalid',

      ],

    ];

    $form_state = new FormState();

    $description_top = '<p>' . t('The handler for this item is broken or missing. The following details are available:') . '</p>';

    $description_bottom = '<p>' . t('Enabling the appropriate module may solve this issue. Otherwise, check to see if there is a module update available.') . '</p>';

    foreach ($types as $type => $class) {

      foreach ($items as $item) {

        $handler = $this->container->get('plugin.manager.views.' . $type)

          ->getHandler($item);

        $this->assertTrue($handler instanceof $class);

        // Make sure details available at edit form.

        $form = [];

        $handler->buildOptionsForm($form, $form_state);

        $this->assertEquals($description_top, $form['description']['description_top']['#markup']);

        $this->assertEquals($description_bottom, $form['description']['description_bottom']['#markup']);

        $details = [];

        foreach ($item as $key => $value) {

          $details[] = new FormattableMarkup('@key: @value', ['@key' => $key, '@value' => $value]);

        }

        $this->assertEquals($details, $form['description']['detail_list']['#items']);

      }

    }

    $views_data = $this->viewsData();

    ];

    $handler = $this->container->get('plugin.manager.views.filter')->getHandler($item, 'standard');

    $this->assertInstanceOf(Standard::class, $handler);

    // @todo Reinstate these tests when the debug() in views_get_handler() is

    //   restored.

    return;

    // Test non-existent tables/fields.

    set_error_handler([$this, 'customErrorHandler']);

    $item = [

      'table' => 'views_test_data',

      'field' => 'field_invalid',

    ];

    $this->container->get('plugin.manager.views.field')->getHandler($item);

    $this->assertStringContainsString(new FormattableMarkup("Missing handler: @table @field @type", ['@table' => 'views_test_data', '@field' => 'field_invalid', '@type' => 'field']), $this->lastErrorMessage, 'An invalid field name throws a debug message.');

    unset($this->lastErrorMessage);

    $item = [

      'table' => 'table_invalid',

      'field' => 'id',

    ];

    $this->container->get('plugin.manager.views.filter')->getHandler($item);

    $this->assertStringContainsString(new FormattableMarkup("Missing handler: @table @field @type", ['@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter']), $this->lastErrorMessage, 'An invalid table name throws a debug message.');

    unset($this->lastErrorMessage);

    $item = [

      'table' => 'table_invalid',

      'field' => 'id',

    ];

    $this->container->get('plugin.manager.views.filter')->getHandler($item);

    $this->assertStringContainsString(new FormattableMarkup("Missing handler: @table @field @type", ['@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter']), $this->lastErrorMessage, 'An invalid table name throws a debug message.');

    unset($this->lastErrorMessage);

    restore_error_handler();

  }

  /**

   * Defines an error handler which is used in the test.

   *

   * Because this is registered in set_error_handler(), it has to be public.

   *

   * @param int $error_level

   *   The level of the error raised.

   * @param string $message

   *   The error message.

   * @param string $filename

   *   The filename that the error was raised in.

   * @param int $line

   *   The line number the error was raised at.

   * @param array $context

   *   An array that points to the active symbol table at the point the error

   *   occurred.

   *

   * @see set_error_handler()

   */

  public function customErrorHandler($error_level, $message, $filename, $line, $context) {

    $this->lastErrorMessage = $message;

  }

  /**