Updated to Drupal 8.5. Core Media not yet in use.
[yaffs-website] / web / modules / contrib / paragraphs / tests / src / Functional / ParagraphsExperimentalDragAndDropModeTest.php
diff --git a/web/modules/contrib/paragraphs/tests/src/Functional/ParagraphsExperimentalDragAndDropModeTest.php b/web/modules/contrib/paragraphs/tests/src/Functional/ParagraphsExperimentalDragAndDropModeTest.php
new file mode 100644 (file)
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--- /dev/null
@@ -0,0 +1,672 @@
+<?php
+
+namespace Drupal\Tests\paragraphs\Functional;
+
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
+use Drupal\node\Entity\Node;
+use Drupal\paragraphs\Entity\Paragraph;
+use Drupal\Tests\BrowserTestBase;
+use Drupal\Tests\paragraphs\FunctionalJavascript\ParagraphsTestBaseTrait;
+
+/**
+ * Tests the drag and drop mode of paragraphs.
+ *
+ * @group paragraphs
+ */
+class ParagraphsExperimentalDragAndDropModeTest extends BrowserTestBase {
+
+  use ParagraphsTestBaseTrait;
+
+  /**
+   * Modules to be enabled.
+   */
+  public static $modules = [
+    'node',
+    'paragraphs',
+    'field'
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp() {
+    parent::setUp();
+    $this->addParagraphedContentType('paragraphed_test', 'field_paragraphs');
+    $this->addParagraphsType('paragraphs_container');
+    $this->addParagraphsType('text');
+    $this->addFieldtoParagraphType('text', 'field_text', 'text');
+
+    $this->addParagraphsField('paragraphs_container', 'paragraphs_container_paragraphs', 'paragraph');
+
+    // Make sure the paragraph fields use closed edit mode by default.
+    $component = [
+      'type' => 'paragraphs',
+      'region' => 'content',
+      'settings' => [
+        'edit_mode' => 'closed',
+        'add_mode' => 'modal',
+        'form_display_mode' => 'default',
+      ],
+    ];
+
+    EntityFormDisplay::load('paragraph.paragraphs_container.default')
+      ->setComponent('paragraphs_container_paragraphs', $component)
+      ->save();
+
+    EntityFormDisplay::load('node.paragraphed_test.default')
+      ->setComponent('field_paragraphs', $component)
+      ->save();
+
+    $admin = $this->drupalCreateUser([
+      'create paragraphed_test content',
+      'edit any paragraphed_test content'
+    ]);
+    $this->drupalLogin($admin);
+
+    // By default, paragraphs does not show the Drag & drop button if the
+    // library is not present. Override this for tests, as they don't need the
+    // JS.
+    \Drupal::state()->set('paragraphs_test_dragdrop_force_show', TRUE);
+  }
+
+  /**
+   * Tests moving a paragraph from a container to top-level.
+   */
+  public function testChangeParagraphParentWeight() {
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create a second text paragraph.
+    $text_paragraph_2 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 2.',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_2->save();
+
+    // Create container that contains the first two text paragraphs.
+    $paragraph = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1, $text_paragraph_2],
+    ]);
+    $paragraph->save();
+
+    // Add test content with paragraph container and the third text paragraph.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph],
+    ]);
+    $node->save();
+
+    // Check that the parent of the second text paragraph is the paragraph
+    // container.
+    $text_paragraph_2 = Paragraph::load($text_paragraph_2->id());
+    $this->assertEquals($text_paragraph_2->get('parent_id')->value, $paragraph->id());
+    $this->assertEquals($text_paragraph_2->get('parent_type')->value, 'paragraph');
+
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+    $this->drupalPostForm(NULL, [], 'Drag & drop');
+
+    $assert_session = $this->assertSession();
+    $assert_session->hiddenFieldValueEquals('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]', 'field_paragraphs][0][paragraphs_container_paragraphs');
+    $assert_session->hiddenFieldValueEquals('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][1][_path]', 'field_paragraphs][0][paragraphs_container_paragraphs');
+
+    // Change the path of the first text paragraph to the node as its parent.
+    // This also requires an update of the path of the second paragraph in the
+    // container as that moves down as well as the weight to prevent multiple
+    // identical weights.
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][1][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][_weight]')
+      ->setValue(1);
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][1][_weight]')
+      ->setValue(0);
+
+    $this->drupalPostForm(NULL, [], 'Complete drag & drop');
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Check the new structure of the node and its paragraphs.
+    \Drupal::entityTypeManager()->getStorage('node')->resetCache();
+    $node = Node::load($node->id());
+    $this->assertEquals(count($node->get('field_paragraphs')), 2);
+
+    $this->assertEquals($node->get('field_paragraphs')->get(0)->target_id, $text_paragraph_1->id());
+    $text_paragraph_1 = $node->get('field_paragraphs')->get(0)->entity;
+    $this->assertEquals($text_paragraph_1->get('parent_id')->value, $node->id());
+    $this->assertEquals($text_paragraph_1->get('parent_type')->value, 'node');
+
+    $this->assertEquals($node->get('field_paragraphs')->get(1)->target_id, $paragraph->id());
+    $paragraph = $node->get('field_paragraphs')->get(1)->entity;
+    $this->assertEquals($paragraph->get('parent_id')->value, $node->id());
+    $this->assertEquals($paragraph->get('parent_type')->value, 'node');
+
+    $this->assertEquals(count($paragraph->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph->get('paragraphs_container_paragraphs')->target_id, $text_paragraph_2->id());
+
+    $text_paragraph_2 = $paragraph->get('paragraphs_container_paragraphs')->entity;
+    $this->assertEquals($text_paragraph_2->get('parent_id')->value, $paragraph->id());
+    $this->assertEquals($text_paragraph_2->get('parent_type')->value, 'paragraph');
+
+    // If the library does not exist, test that the button is not visible
+    // without forcing it. This can not be tested if the library exists.
+    // @todo: Implement a library alter in a test module to do this?
+    $library_discovery = \Drupal::service('library.discovery');
+    $library = $library_discovery->getLibraryByName('paragraphs', 'paragraphs-dragdrop');
+    if (!$library) {
+      \Drupal::state()->set('paragraphs_test_dragdrop_force_show', FALSE);
+      $this->drupalGet('/node/' . $node->id() . '/edit');
+      $this->assertSession()->buttonNotExists('Drag & drop');
+    }
+  }
+
+  /**
+   * Tests moving a paragraph from one container to another.
+   */
+  public function testChangeParagraphContainerMove() {
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create container that contains the first two text paragraphs.
+    $paragraph = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1],
+    ]);
+    $paragraph->save();
+
+    // Create an empty container paragraph.
+    $paragraph_1 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [],
+    ]);
+    $paragraph_1->save();
+
+    // Add test content with paragraph container and the third text paragraph.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph, $paragraph_1],
+    ]);
+    $node->save();
+
+    // Change the path of the text paragraph to the empty container as its
+    // parent.
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+    $this->drupalPostForm(NULL, [], 'Drag & drop');
+
+    // Ensure that the summary is displayed correctly.
+    $this->assertSession()->elementTextContains('css', '.paragraphs-dragdrop-wrapper li:nth-of-type(1)', 'Test text 1');
+    $this->assertSession()->elementTextNotContains('css', '.paragraphs-dragdrop-wrapper li:nth-of-type(2)', 'Test text 1');
+
+    $this->assertSession()
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $this->drupalPostForm(NULL, [], 'Complete drag & drop');
+
+    // Ensure the summary is displayed correctly for the collapsed paragraphs.
+    $this->assertSession()->elementTextNotContains('css', '.field--name-field-paragraphs tbody tr:nth-of-type(1) .paragraph-type-summary', 'Test text 1');
+    $this->assertSession()->elementTextContains('css', '.field--name-field-paragraphs tbody tr:nth-of-type(2) .paragraph-type-summary', 'Test text 1');
+
+    // Ensure that the summary was updated correctly when going back to drag and
+    // drop mode.
+    $this->drupalPostForm(NULL, [], 'Drag & drop');
+    $this->assertSession()->elementTextNotContains('css', '.paragraphs-dragdrop-wrapper li:nth-of-type(1)', 'Test text 1');
+    $this->assertSession()->elementTextContains('css', '.paragraphs-dragdrop-wrapper li:nth-of-type(2)', 'Test text 1');
+    $this->drupalPostForm(NULL, [], 'Complete drag & drop');
+
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Check that the parent of the text paragraph is the second paragraph
+    // container.
+    \Drupal::entityTypeManager()->getStorage('node')->resetCache();
+    $node = Node::load($node->id());
+    $this->assertEquals(count($node->get('field_paragraphs')), 2);
+
+    $this->assertEquals($node->get('field_paragraphs')->get(0)->target_id, $paragraph->id());
+    $this->assertEquals($node->get('field_paragraphs')->get(1)->target_id, $paragraph_1->id());
+    $paragraph = $node->get('field_paragraphs')->get(0)->entity;
+
+    $this->assertEquals(count($paragraph->get('paragraphs_container_paragraphs')), 0);
+
+    $paragraph_1 = $node->get('field_paragraphs')->get(1)->entity;
+    $this->assertEquals(count($paragraph_1->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph_1->get('paragraphs_container_paragraphs')->get(0)->target_id, $text_paragraph_1->id());
+
+    $text_paragraph_1 = $paragraph_1->get('paragraphs_container_paragraphs')->entity;
+    $this->assertEquals($text_paragraph_1->get('parent_id')->value, $paragraph_1->id());
+    $this->assertEquals($text_paragraph_1->get('parent_type')->value, 'paragraph');
+  }
+
+  /**
+   * Tests drag and drop mode with multiple changes on the paragraphs.
+   */
+  public function testMultipleChangesParagraphs() {
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create a second text paragraph.
+    $text_paragraph_2 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 2.',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_2->save();
+
+    // Create container that contains the first two text paragraphs.
+    $paragraph_1 = Paragraph::create([
+      'title' => 'Test Paragraph 1',
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1, $text_paragraph_2],
+    ]);
+    $paragraph_1->save();
+
+    // Create another text paragraph.
+    $text_paragraph_3 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 3.',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_3->save();
+
+    // Create a container that contains the third text paragraph.
+    $paragraph_2 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_3],
+    ]);
+    $paragraph_2->save();
+
+    // Create a container that contains the second paragraph.
+    $paragraph_3 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$paragraph_2],
+    ]);
+    $paragraph_3->save();
+
+    // Create an empty container paragraph.
+    $paragraph_4 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [],
+    ]);
+    $paragraph_4->save();
+
+    // Create a node with the structure of three nested paragraphs, first
+    // paragraph with two text paragraphs, second paragraph with a nested
+    // paragraph containing a text paragraph and the third empty paragraph.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph_1, $paragraph_3, $paragraph_4],
+    ]);
+    $node->save();
+
+    // Edit the node.
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+    $this->getSession()->getPage()->findButton('field_paragraphs_2_edit')->press();
+    $this->getSession()->getPage()->findButton('field_paragraphs_2_subform_paragraphs_container_paragraphs_text_add_more')->press();
+
+    $edit = [
+      'field_paragraphs[2][subform][paragraphs_container_paragraphs][0][subform][field_text][0][value]' => 'new paragraph',
+    ];
+    $this->drupalPostForm(NULL, $edit, 'Drag & drop');
+
+    // Change the structure of the node, third text paragraph goes to first
+    // container, the first text paragraph goes to the second container (child
+    // of third container) and the third container goes to the fourth container.
+    // This also affects weights and paths of child and related paragraphs.
+    $assert_session = $this->assertSession();
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][1][dragdrop][paragraphs_container_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][0][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs][0][paragraphs_container_paragraphs][0][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][1][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs][0][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][1][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][2][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][1][_weight]')
+      ->setValue(0);
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][2][dragdrop][paragraphs_container_paragraphs][list][0][_weight]')
+      ->setValue(1);
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][2][_weight]')
+      ->setValue(1);
+
+    // Save immediately, without separately confirming the widget changes.
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Reset the cache to make sure that the loaded parents are the new ones.
+    \Drupal::entityTypeManager()->getStorage('paragraph')->resetCache();
+    // Assert the new parents of the text paragraphs.
+    $text_paragraph_1 = Paragraph::load($text_paragraph_1->id());
+    $this->assertEquals($text_paragraph_1->get('parent_id')->value, $paragraph_2->id());
+    $this->assertEquals($text_paragraph_1->get('parent_type')->value, 'paragraph');
+
+    $text_paragraph_3 = Paragraph::load($text_paragraph_3->id());
+    $this->assertEquals($text_paragraph_3->get('parent_id')->value, $paragraph_1->id());
+    $this->assertEquals($text_paragraph_3->get('parent_type')->value, 'paragraph');
+
+    // Assert the new parent of the container.
+    $paragraph_3 =Paragraph::load($paragraph_3->id());
+    $this->assertEquals($paragraph_3->get('parent_id')->value, $paragraph_4->id());
+    $this->assertEquals($paragraph_3->get('parent_type')->value, 'paragraph');
+  }
+
+  /**
+   * Tests that a separate field is not affected by reordering one field.
+   */
+  public function testChangeParagraphContainerMultipleFields() {
+    $this->addParagraphsField('paragraphed_test', 'field_paragraphs_second', 'node');
+
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create second text paragraph.
+    $text_paragraph_2 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 2',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_2->save();
+
+    // Create container that contains the first two text paragraphs.
+    $paragraph = Paragraph::create([
+      'title' => 'Test Paragraph',
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1],
+    ]);
+    $paragraph->save();
+
+    // Create an empty container paragraph.
+    $paragraph_1 = Paragraph::create([
+      'title' => 'Test Paragraph 1',
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [],
+    ]);
+    $paragraph_1->save();
+
+    // Create a container paragraph for the second field.
+    $paragraph_second = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_2],
+    ]);
+    $paragraph_second->save();
+
+    // Add test content with paragraph container and the third text paragraph.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph, $paragraph_1],
+      'field_paragraphs_second' => [$paragraph_second],
+    ]);
+    $node->save();
+
+    // Change the path of the text paragraph to the empty container as its
+    // parent.
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+    $this->drupalPostForm(NULL, [], 'Drag & drop');
+
+    // Make sure that the second paragraph field is still displayed normally by
+    // checking that it displays the edit button, as it is closed by default.
+    // @todo: Introduce a global drag and drop mode?
+    $this->assertSession()->buttonExists('field_paragraphs_second_0_subform_paragraphs_container_paragraphs_0_edit');
+
+    // Change the path of the text paragraph to the empty container as its
+    // parent.
+    $this->assertSession()
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Check that the parent of the text paragraph is the second paragraph
+    // container.
+    \Drupal::entityTypeManager()->getStorage('node')->resetCache();
+    $node = Node::load($node->id());
+    $this->assertEquals(count($node->get('field_paragraphs')), 2);
+
+    $this->assertEquals($node->get('field_paragraphs')->get(0)->target_id, $paragraph->id());
+    $this->assertEquals($node->get('field_paragraphs')->get(1)->target_id, $paragraph_1->id());
+    $paragraph = $node->get('field_paragraphs')->get(0)->entity;
+
+    $this->assertEquals(count($paragraph->get('paragraphs_container_paragraphs')), 0);
+
+    $paragraph_1 = $node->get('field_paragraphs')->get(1)->entity;
+    $this->assertEquals(count($paragraph_1->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph_1->get('paragraphs_container_paragraphs')->get(0)->target_id, $text_paragraph_1->id());
+
+    $text_paragraph_1 = $paragraph_1->get('paragraphs_container_paragraphs')->entity;
+    $this->assertEquals($text_paragraph_1->get('parent_id')->value, $paragraph_1->id());
+    $this->assertEquals($text_paragraph_1->get('parent_type')->value, 'paragraph');
+
+    // Assert the second field.
+    $this->assertEquals(count($node->get('field_paragraphs_second')), 1);
+
+    $this->assertEquals($node->get('field_paragraphs_second')->get(0)->target_id, $paragraph_second->id());
+    $paragraph_second = $node->get('field_paragraphs_second')->get(0)->entity;
+
+    $this->assertEquals(count($paragraph_second->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph_second->get('paragraphs_container_paragraphs')->get(0)->target_id, $text_paragraph_2->id());
+  }
+
+  /**
+   * Tests moving a paragraph and after that enable the drag and drop mode.
+   */
+  public function testChangeParagraphMoveBeforeReorder() {
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create text paragraph.
+    $text_paragraph_2 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 2',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_2->save();
+
+    // Create container that contains the first text paragraphs.
+    $paragraph = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1],
+    ]);
+    $paragraph->save();
+
+    // Create an empty container paragraph.
+    $paragraph_1 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [],
+    ]);
+    $paragraph_1->save();
+
+    // Create the node with two containers and the second text in the middle.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph, $text_paragraph_2, $paragraph_1],
+    ]);
+    $node->save();
+
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+
+    // Move the second text below the container.
+    $edit = [
+      'field_paragraphs[1][_weight]' => 2,
+      'field_paragraphs[2][_weight]' => 1,
+    ];
+    $this->drupalPostForm(NULL, $edit, 'Drag & drop');
+
+    // Change the path of the text paragraph to the empty container as its
+    // parent.
+    $this->assertSession()
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][dragdrop][paragraphs_container_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][1][paragraphs_container_paragraphs');
+    $this->drupalPostForm(NULL, [], 'Complete drag & drop');
+
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Check that the parent of the text paragraph is the second paragraph
+    // container.
+    \Drupal::entityTypeManager()->getStorage('node')->resetCache();
+    $node = Node::load($node->id());
+    $this->assertEquals(count($node->get('field_paragraphs')), 3);
+
+    $this->assertEquals($node->get('field_paragraphs')->get(0)->target_id, $paragraph->id());
+    $this->assertEquals($node->get('field_paragraphs')->get(1)->target_id, $paragraph_1->id());
+    $this->assertEquals($node->get('field_paragraphs')->get(2)->target_id, $text_paragraph_2->id());
+    $paragraph = $node->get('field_paragraphs')->get(0)->entity;
+
+    $this->assertEquals(count($paragraph->get('paragraphs_container_paragraphs')), 0);
+
+    $paragraph_1 = $node->get('field_paragraphs')->get(1)->entity;
+    $this->assertEquals(count($paragraph_1->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph_1->get('paragraphs_container_paragraphs')->get(0)->target_id, $text_paragraph_1->id());
+
+    $text_paragraph_1 = $paragraph_1->get('paragraphs_container_paragraphs')->entity;
+    $this->assertEquals($text_paragraph_1->get('parent_id')->value, $paragraph_1->id());
+    $this->assertEquals($text_paragraph_1->get('parent_type')->value, 'paragraph');
+  }
+
+  /**
+   * Tests deleting a paragraph and after that enable the drag and drop mode.
+   */
+  public function testChangeParagraphMoveAfterDelete() {
+    // Create text paragraph.
+    $text_paragraph_1 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 1',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_1->save();
+
+    // Create text paragraph.
+    $text_paragraph_2 = Paragraph::create([
+      'type' => 'text',
+      'field_text' => [
+        'value' => 'Test text 2',
+        'format' => 'plain_text',
+      ],
+    ]);
+    $text_paragraph_2->save();
+
+    // Create container that contains the first text paragraphs.
+    $paragraph = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [$text_paragraph_1],
+    ]);
+    $paragraph->save();
+
+    // Create an empty container paragraph.
+    $paragraph_1 = Paragraph::create([
+      'type' => 'paragraphs_container',
+      'paragraphs_container_paragraphs' => [],
+    ]);
+    $paragraph_1->save();
+
+    // Create the node with two containers and the second text in the middle.
+    $node = Node::create([
+      'type' => 'paragraphed_test',
+      'title' => 'Paragraphs Test',
+      'field_paragraphs' => [$paragraph, $text_paragraph_2, $paragraph_1],
+    ]);
+    $node->save();
+
+    $this->drupalGet('/node/' . $node->id() . '/edit');
+
+    // Delete the first container, move the text 2 paragraph into the second
+    // container.
+    $this->getSession()->getPage()->pressButton('field_paragraphs_0_remove');
+    $this->drupalPostForm(NULL, [], 'Drag & drop');
+
+    $assert_session = $this->assertSession();
+
+    $assert_session->pageTextNotContains('Test text 1');
+    $assert_session->pageTextContains('Test text 2');
+
+    // Change the path of the text 2 paragraph to the empty container as its
+    // parent.
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][0][_path]')
+      ->setValue('field_paragraphs][0][paragraphs_container_paragraphs');
+    $assert_session
+      ->hiddenFieldExists('field_paragraphs[dragdrop][field_paragraphs][list][1][_weight]')
+      ->setValue(0);
+
+    $this->drupalPostForm(NULL, [], 'Complete drag & drop');
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Check that the parent of the text paragraph is the second paragraph
+    // container.
+    \Drupal::entityTypeManager()->getStorage('node')->resetCache();
+    $node = Node::load($node->id());
+    $this->assertEquals(count($node->get('field_paragraphs')), 1);
+
+    $this->assertEquals($node->get('field_paragraphs')->get(0)->target_id, $paragraph_1->id());
+    $paragraph_1 = $node->get('field_paragraphs')->get(0)->entity;
+    $this->assertEquals(count($paragraph_1->get('paragraphs_container_paragraphs')), 1);
+    $this->assertEquals($paragraph_1->get('paragraphs_container_paragraphs')->get(0)->target_id, $text_paragraph_2->id());
+
+    $text_paragraph_2 = $paragraph_1->get('paragraphs_container_paragraphs')->entity;
+    $this->assertEquals($text_paragraph_2->get('parent_id')->value, $paragraph_1->id());
+    $this->assertEquals($text_paragraph_2->get('parent_type')->value, 'paragraph');
+  }
+
+}