EntityReferenceWidgetTest.php in Entity Browser 8

Namespace

Drupal\Tests\entity_browser\FunctionalJavascript

File

tests/src/FunctionalJavascript/EntityReferenceWidgetTest.php

<?php

namespace Drupal\Tests\entity_browser\FunctionalJavascript;

use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\entity_browser\Element\EntityBrowserElement;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\node\Entity\Node;
use Drupal\user\Entity\Role;

/**
 * Tests the Entity Reference Widget.
 *
 * @group entity_browser
 */
class EntityReferenceWidgetTest extends EntityBrowserWebDriverTestBase {

  /**
   * {@inheritdoc}
   */
  public function setUp() {
    parent::setUp();

    /** @var \Drupal\user\RoleInterface $role */
    $role = Role::load('authenticated');
    $this
      ->grantPermissions($role, [
      'access test_entity_browser_iframe_node_view entity browser pages',
      'bypass node access',
      'administer node form display',
      'access contextual links',
    ]);
  }

  /**
   * Tests Entity Reference widget.
   */
  public function testEntityReferenceWidget() {

    // Create an entity_reference field to test the widget.
    $field_storage = FieldStorageConfig::create([
      'field_name' => 'field_entity_reference1',
      'type' => 'entity_reference',
      'entity_type' => 'node',
      'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
      'settings' => [
        'target_type' => 'node',
      ],
    ]);
    $field_storage
      ->save();
    $field = FieldConfig::create([
      'field_name' => 'field_entity_reference1',
      'entity_type' => 'node',
      'bundle' => 'article',
      'label' => 'Referenced articles',
      'settings' => [],
    ]);
    $field
      ->save();

    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display */
    $form_display = $this->container
      ->get('entity_type.manager')
      ->getStorage('entity_form_display')
      ->load('node.article.default');
    $form_display
      ->setComponent('field_entity_reference1', [
      'type' => 'entity_browser_entity_reference',
      'settings' => [
        'entity_browser' => 'test_entity_browser_iframe_node_view',
        'open' => TRUE,
        'field_widget_edit' => TRUE,
        'field_widget_remove' => TRUE,
        'field_widget_replace' => FALSE,
        'selection_mode' => EntityBrowserElement::SELECTION_MODE_APPEND,
        'field_widget_display' => 'rendered_entity',
        'field_widget_display_settings' => [
          'view_mode' => 'teaser',
        ],
      ],
    ])
      ->save();

    // Create a dummy node that will be used as target.
    $target_node = Node::create([
      'title' => 'Walrus',
      'type' => 'article',
    ]);
    $target_node
      ->save();
    $target_node_translation = $target_node
      ->addTranslation('fr', $target_node
      ->toArray());
    $target_node_translation
      ->setTitle('le Morse');
    $target_node_translation
      ->save();
    $this
      ->drupalGet('/node/add/article');
    $this
      ->assertSession()
      ->fieldExists('title[0][value]')
      ->setValue('Referencing node 1');
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:1]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->assertTrue($this
      ->assertSession()
      ->waitForText('Walrus'));
    $this
      ->assertSession()
      ->buttonExists('Save')
      ->press();
    $this
      ->assertSession()
      ->pageTextContains('Article Referencing node 1 has been created.');
    $nid = $this->container
      ->get('entity.query')
      ->get('node')
      ->condition('title', 'Referencing node 1')
      ->execute();
    $nid = reset($nid);

    // Assert correct translation appears.
    // @see Drupal\entity_browser\Plugin\EntityBrowser\FieldWidgetDisplay\EntityLabel
    $this
      ->drupalGet('fr/node/' . $nid . '/edit');
    $this
      ->assertSession()
      ->pageTextContains('le Morse');
    $this
      ->drupalGet('node/' . $nid . '/edit');
    $this
      ->assertSession()
      ->pageTextContains('Walrus');

    // Make sure both "Edit" and "Remove" buttons are visible.
    $this
      ->assertSession()
      ->buttonExists('edit-field-entity-reference1-current-items-0-remove-button');
    $this
      ->assertSession()
      ->buttonExists('edit-field-entity-reference1-current-items-0-edit-button')
      ->press();

    // Make sure the contextual links are not present.
    $this
      ->assertSession()
      ->elementNotExists('css', '.contextual-links');

    // Test edit dialog by changing title of referenced entity.
    $edit_dialog = $this
      ->assertSession()
      ->waitForElement('xpath', '//div[contains(@id, "node-' . $target_node
      ->id() . '-edit-dialog")]');
    $title_field = $edit_dialog
      ->findField('title[0][value]');
    $title = $title_field
      ->getValue();
    $this
      ->assertEquals('Walrus', $title);
    $title_field
      ->setValue('Alpaca');
    $this
      ->assertSession()
      ->elementExists('css', '.ui-dialog-buttonset.form-actions .form-submit')
      ->press();
    $this
      ->waitForAjaxToFinish();

    // Check that new title is displayed.
    $this
      ->assertSession()
      ->pageTextNotContains('Walrus');
    $this
      ->assertSession()
      ->pageTextContains('Alpaca');

    // Test whether changing these definitions on the browser config effectively
    // change the visibility of the buttons.
    $form_display
      ->setComponent('field_entity_reference1', [
      'type' => 'entity_browser_entity_reference',
      'settings' => [
        'entity_browser' => 'test_entity_browser_iframe_node_view',
        'open' => TRUE,
        'field_widget_edit' => FALSE,
        'field_widget_remove' => FALSE,
        'field_widget_replace' => FALSE,
        'selection_mode' => EntityBrowserElement::SELECTION_MODE_APPEND,
        'field_widget_display' => 'label',
        'field_widget_display_settings' => [],
      ],
    ])
      ->save();
    $this
      ->drupalGet('node/' . $nid . '/edit');
    $this
      ->assertSession()
      ->buttonNotExists('edit-field-entity-reference1-current-items-0-remove-button');
    $this
      ->assertSession()
      ->buttonNotExists('edit-field-entity-reference1-current-items-0-edit-button');

    // Set them to visible again.
    $form_display
      ->setComponent('field_entity_reference1', [
      'type' => 'entity_browser_entity_reference',
      'settings' => [
        'entity_browser' => 'test_entity_browser_iframe_node_view',
        'open' => TRUE,
        'field_widget_edit' => TRUE,
        'field_widget_remove' => TRUE,
        'field_widget_replace' => FALSE,
        'selection_mode' => EntityBrowserElement::SELECTION_MODE_APPEND,
        'field_widget_display' => 'label',
        'field_widget_display_settings' => [],
      ],
    ])
      ->save();
    $this
      ->drupalGet('node/' . $nid . '/edit');
    $remove_button = $this
      ->assertSession()
      ->buttonExists('edit-field-entity-reference1-current-items-0-remove-button');
    $this
      ->assertEquals('Remove', $remove_button
      ->getValue());
    $this
      ->assertTrue($remove_button
      ->hasClass('remove-button'));
    $edit_button = $this
      ->assertSession()
      ->buttonExists('edit-field-entity-reference1-current-items-0-edit-button');
    $this
      ->assertEquals('Edit', $edit_button
      ->getValue());
    $this
      ->assertTrue($edit_button
      ->hasClass('edit-button'));

    // Make sure the "Replace" button is not there.
    $this
      ->assertSession()
      ->buttonNotExists('edit-field-entity-reference1-current-items-0-replace-button');

    // Test the "Remove" button on the widget works.
    $this
      ->assertSession()
      ->buttonExists('Remove')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->pageTextNotContains('Alpaca');

    // Test the "Replace" button functionality.
    $form_display
      ->setComponent('field_entity_reference1', [
      'type' => 'entity_browser_entity_reference',
      'settings' => [
        'entity_browser' => 'test_entity_browser_iframe_node_view',
        'open' => TRUE,
        'field_widget_edit' => TRUE,
        'field_widget_remove' => TRUE,
        'field_widget_replace' => TRUE,
        'selection_mode' => EntityBrowserElement::SELECTION_MODE_APPEND,
        'field_widget_display' => 'label',
        'field_widget_display_settings' => [],
      ],
    ])
      ->save();

    // In order to ensure the replace button opens the browser, it needs to be
    // closed.

    /** @var \Drupal\entity_browser\EntityBrowserInterface $browser */
    $browser = $this->container
      ->get('entity_type.manager')
      ->getStorage('entity_browser')
      ->load('test_entity_browser_iframe_node_view');
    $browser
      ->getDisplay()
      ->setConfiguration([
      'width' => 650,
      'height' => 500,
      'link_text' => 'Select entities',
      'auto_open' => FALSE,
    ]);
    $browser
      ->save();

    // We'll need a third node to be able to make a new selection.
    $target_node2 = Node::create([
      'title' => 'Target example node 2',
      'type' => 'article',
    ]);
    $target_node2
      ->save();
    $this
      ->drupalGet('node/' . $nid . '/edit');

    // If there is only one entity in the current selection the button should
    // show up.
    $replace_button = $this
      ->assertSession()
      ->buttonExists('edit-field-entity-reference1-current-items-0-replace-button');
    $this
      ->assertEquals('Replace', $replace_button
      ->getValue());
    $this
      ->assertTrue($replace_button
      ->hasClass('replace-button'));

    // Clicking on the button should empty the selection and automatically
    // open the browser again.
    $replace_button
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:3]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();

    // Even in the AJAX-built markup for the newly selected element, the replace
    // button should be there.
    $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-replace-button"]');

    // Adding a new node to the selection, however, should make it disappear.
    $open_iframe_link = $this
      ->assertSession()
      ->elementExists('css', 'a[data-drupal-selector="edit-field-entity-reference1-entity-browser-entity-browser-link"]');
    $open_iframe_link
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:1]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->elementNotExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-replace-button"]');
    $this
      ->assertSession()
      ->buttonExists('Save')
      ->press();
    $this
      ->assertSession()
      ->pageTextContains('Article Referencing node 1 has been updated.');

    // Test the replace button again with different field cardinalities.
    FieldStorageConfig::load('node.field_entity_reference1')
      ->setCardinality(1)
      ->save();
    $this
      ->drupalGet('/node/add/article');
    $this
      ->assertSession()
      ->fieldExists('title[0][value]')
      ->setValue('Referencing node 2');
    $open_iframe_link = $this
      ->assertSession()
      ->elementExists('css', 'a[data-drupal-selector="edit-field-entity-reference1-entity-browser-entity-browser-link"]');
    $open_iframe_link
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:1]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->elementContains('css', '#edit-field-entity-reference1-wrapper', 'Alpaca');

    // All three buttons should be visible.
    $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-remove-button"]');
    $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-edit-button"]');
    $replace_button = $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-replace-button"]');

    // Clicking on the button should empty the selection and automatically
    // open the browser again.
    $replace_button
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:2]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->elementContains('css', '#edit-field-entity-reference1-wrapper', 'Referencing node 1');

    // Do the same as above but now with cardinality 2.
    FieldStorageConfig::load('node.field_entity_reference1')
      ->setCardinality(2)
      ->save();
    $this
      ->drupalGet('/node/add/article');
    $this
      ->assertSession()
      ->fieldExists('title[0][value]')
      ->setValue('Referencing node 3');
    $open_iframe_link = $this
      ->assertSession()
      ->elementExists('css', 'a[data-drupal-selector="edit-field-entity-reference1-entity-browser-entity-browser-link"]');
    $open_iframe_link
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:1]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->elementContains('css', '#edit-field-entity-reference1-wrapper', 'Alpaca');

    // All three buttons should be visible.
    $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-remove-button"]');
    $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-edit-button"]');
    $replace_button = $this
      ->assertSession()
      ->elementExists('css', 'input[data-drupal-selector="edit-field-entity-reference1-current-items-0-replace-button"]');

    // Clicking on the button should empty the selection and automatically
    // open the browser again.
    $replace_button
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:2]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->wait(1000);
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->elementContains('css', '#edit-field-entity-reference1-wrapper', 'Referencing node 1');

    // Verify that if the user cannot edit the entity, the "Edit" button does
    // not show up, even if configured to.

    /** @var \Drupal\user\RoleInterface $role */
    $role = Role::load('authenticated');
    $role
      ->revokePermission('bypass node access')
      ->trustData()
      ->save();
    $this
      ->drupalGet('node/add/article');
    $open_iframe_link = $this
      ->assertSession()
      ->elementExists('css', 'a[data-drupal-selector="edit-field-entity-reference1-entity-browser-entity-browser-link"]');
    $open_iframe_link
      ->click();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_test_entity_browser_iframe_node_view');
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:1]')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->buttonNotExists('edit-field-entity-reference1-current-items-0-edit-button');
  }

  /**
   * Tests that drag and drop functions properly.
   */
  public function testDragAndDrop() {
    $gatsby = $this
      ->createNode([
      'type' => 'shark',
      'title' => 'Gatsby',
    ]);
    $daisy = $this
      ->createNode([
      'type' => 'jet',
      'title' => 'Daisy',
    ]);
    $nick = $this
      ->createNode([
      'type' => 'article',
      'title' => 'Nick',
    ]);
    $santa = $this
      ->createNode([
      'type' => 'shark',
      'title' => 'Santa Claus',
    ]);
    $easter_bunny = $this
      ->createNode([
      'type' => 'jet',
      'title' => 'Easter Bunny',
    ]);
    $pumpkin_king = $this
      ->createNode([
      'type' => 'article',
      'title' => 'Pumpkin King',
    ]);
    $field1_storage_config = [
      'field_name' => 'field_east_egg',
      'type' => 'entity_reference',
      'entity_type' => 'node',
      'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
      'settings' => [
        'target_type' => 'node',
      ],
    ];
    $field2_storage_config = [
      'field_name' => 'field_east_egg2',
    ] + $field1_storage_config;
    $field_storage = FieldStorageConfig::create($field1_storage_config);
    $field_storage
      ->save();
    $field_storage2 = FieldStorageConfig::create($field2_storage_config);
    $field_storage2
      ->save();
    $field1_config = [
      'field_name' => 'field_east_egg',
      'entity_type' => 'node',
      'bundle' => 'article',
      'label' => 'East Eggers',
      'settings' => [
        'handler_settings' => [
          'target_bundles' => [
            'shark' => 'shark',
            'jet' => 'jet',
            'article' => 'article',
          ],
        ],
      ],
    ];
    $field2_config = [
      'field_name' => 'field_east_egg2',
      'label' => 'Easter Eggs',
    ] + $field1_config;
    $field = FieldConfig::create($field1_config);
    $field
      ->save();
    $field2 = FieldConfig::create($field2_config);
    $field2
      ->save();

    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display */
    $form_display = $this->container
      ->get('entity_type.manager')
      ->getStorage('entity_form_display')
      ->load('node.article.default');
    $form_display
      ->removeComponent('field_reference');
    $field_widget_config = [
      'type' => 'entity_browser_entity_reference',
      'settings' => [
        'entity_browser' => 'widget_context_default_value',
        'table_settings' => [
          'status_column' => TRUE,
          'bundle_column' => TRUE,
          'label_column' => FALSE,
        ],
        'open' => FALSE,
        'field_widget_edit' => TRUE,
        'field_widget_remove' => TRUE,
        'field_widget_replace' => FALSE,
        'selection_mode' => EntityBrowserElement::SELECTION_MODE_APPEND,
        'field_widget_display' => 'label',
        'field_widget_display_settings' => [],
      ],
    ];
    $form_display
      ->setComponent('field_east_egg', $field_widget_config)
      ->save();
    $form_display
      ->setComponent('field_east_egg2', $field_widget_config)
      ->save();

    // Set auto open to false on the entity browser.
    $entity_browser = $this->container
      ->get('entity_type.manager')
      ->getStorage('entity_browser')
      ->load('widget_context_default_value');
    $display_configuration = $entity_browser
      ->get('display_configuration');
    $display_configuration['auto_open'] = FALSE;
    $entity_browser
      ->set('display_configuration', $display_configuration);
    $entity_browser
      ->save();
    $account = $this
      ->drupalCreateUser([
      'access widget_context_default_value entity browser pages',
      'create article content',
      'access content',
    ]);
    $this
      ->drupalLogin($account);
    $this
      ->drupalGet('node/add/article');
    $this
      ->assertSession()
      ->elementExists('xpath', '(//summary)[1]')
      ->click();

    // Open the entity browser widget form.
    $this
      ->getSession()
      ->getPage()
      ->clickLink('Select entities');
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_widget_context_default_value');
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $gatsby
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $daisy
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $nick
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->buttonExists('Use selected')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();
    $correct_order = [
      1 => 'Gatsby',
      2 => 'Daisy',
      3 => 'Nick',
    ];
    foreach ($correct_order as $key => $value) {
      $this
        ->assertSession()
        ->elementContains('xpath', "(//div[contains(@class, 'item-container')])[" . $key . "]", $value);
    }

    // Close details 1.
    $this
      ->assertSession()
      ->elementExists('xpath', '(//summary)[1]')
      ->click();

    // Open details 2.
    $this
      ->assertSession()
      ->elementExists('xpath', '(//summary)[2]')
      ->click();

    // Open the entity browser widget form.
    $this
      ->assertSession()
      ->elementExists('xpath', "(//a[contains(text(), 'Select entities')])[2]")
      ->click();
    $this
      ->getSession()
      ->switchToIFrame('entity_browser_iframe_widget_context_default_value');
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $santa
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $easter_bunny
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->fieldExists('entity_browser_select[node:' . $pumpkin_king
      ->id() . ']')
      ->check();
    $this
      ->assertSession()
      ->buttonExists('Select entities')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->buttonExists('Use selected')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $this
      ->getSession()
      ->switchToIFrame();
    $this
      ->waitForAjaxToFinish();

    // Close details 2.
    $this
      ->assertSession()
      ->elementExists('xpath', '(//summary)[2]')
      ->click();

    // Open details 1.
    $this
      ->assertSession()
      ->elementExists('xpath', '(//summary)[1]')
      ->click();
    $first_item = $this
      ->assertSession()
      ->elementExists('xpath', "(//div[contains(@class, 'item-container')])[1]");
    $this
      ->dragDropElement($first_item, 160, 0);
    $this
      ->waitForAjaxToFinish();
    $this
      ->assertSession()
      ->fieldExists('title[0][value]')
      ->setValue('Hello World');
    $this
      ->assertSession()
      ->buttonExists('Save')
      ->press();
    $this
      ->drupalGet('node/7/edit');
    $correct_order = [
      1 => 'Daisy',
      2 => 'Gatsby',
      3 => 'Nick',
      4 => 'Santa Claus',
      5 => 'Easter Bunny',
      6 => 'Pumpkin King',
    ];
    foreach ($correct_order as $key => $value) {
      $this
        ->assertSession()
        ->elementContains('xpath', "(//div[contains(@class, 'item-container')])[" . $key . "]", $value);
    }
    $fourth = $this
      ->assertSession()
      ->elementExists('xpath', "(//div[contains(@class, 'item-container')])[4]");
    $this
      ->dragDropElement($fourth, 160, 0);
    $correct_order = [
      4 => 'Easter Bunny',
      5 => 'Santa Claus',
      6 => 'Pumpkin King',
    ];
    foreach ($correct_order as $key => $value) {
      $this
        ->assertSession()
        ->elementContains('xpath', "(//div[contains(@class, 'item-container')])[" . $key . "]", $value);
    }

    // Test that order is preserved after removing item.
    $this
      ->assertSession()
      ->elementExists('xpath', '(//input[contains(@class, "remove-button")])[5]')
      ->press();
    $this
      ->waitForAjaxToFinish();
    $correct_order = [
      4 => 'Easter Bunny',
      5 => 'Pumpkin King',
    ];
    foreach ($correct_order as $key => $value) {
      $this
        ->assertSession()
        ->elementContains('xpath', "(//div[contains(@class, 'item-container')])[" . $key . "]", $value);
    }
  }

}

Classes

Name	Description
EntityReferenceWidgetTest	Tests the Entity Reference Widget.