--- /dev/null
+<?php
+
+namespace Drupal\paragraphs\Tests\Classic;
+
+use Drupal\field_ui\Tests\FieldUiTestTrait;
+
+/**
+ * Tests the configuration of paragraphs.
+ *
+ * @group paragraphs
+ */
+class ParagraphsPreviewTest extends ParagraphsTestBase {
+
+ use FieldUiTestTrait;
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = array(
+ 'image',
+ );
+
+ /**
+ * Tests the revision of paragraphs.
+ */
+ public function testParagraphsPreview() {
+ // Create paragraph type Headline + Block.
+ $this->addParagraphedContentType('article', 'field_paragraphs');
+ $this->loginAsAdmin([
+ 'administer node display',
+ 'create article content',
+ 'edit any article content',
+ 'delete any article content',
+ ]);
+
+ // Create paragraph type Headline + Block.
+ $this->addParagraphsType('text');
+ // Create field types for the text.
+ $this->fieldUIAddNewField('admin/structure/paragraphs_type/text', 'text', 'Text', 'text', array(), array());
+ $this->assertText('Saved Text configuration.');
+
+ $test_text_1 = 'dummy_preview_text_1';
+ $test_text_2 = 'dummy_preview_text_2';
+ // Create node with two paragraphs.
+ $this->drupalGet('node/add/article');
+ $this->drupalPostAjaxForm(NULL, array(), 'field_paragraphs_text_add_more');
+ // Set the value of the paragraphs.
+ $edit = [
+ 'title[0][value]' => 'Page_title',
+ 'field_paragraphs[0][subform][field_text][0][value]' => $test_text_1,
+ ];
+ // Preview the article.
+ $this->drupalPostForm(NULL, $edit, t('Preview'));
+ // Check if the text is displayed.
+ $this->assertRaw($test_text_1);
+
+ // Go back to the editing form.
+ $this->clickLink('Back to content editing');
+
+ $paragraph_1 = $this->xpath('//*[@id="edit-field-paragraphs-0-subform-field-text-0-value"]')[0];
+ $this->assertEqual($paragraph_1['value'], $test_text_1);
+
+ $this->drupalPostForm(NULL, $edit, t('Save and publish'));
+
+ $this->clickLink('Edit');
+ $this->drupalPostAjaxForm(NULL, array(), 'field_paragraphs_text_add_more');
+ $edit = [
+ 'field_paragraphs[1][subform][field_text][0][value]' => $test_text_2,
+ ];
+ // Preview the article.
+ $this->drupalPostForm(NULL, $edit, t('Preview'));
+ $this->assertRaw($test_text_1);
+ $this->assertRaw($test_text_2);
+
+ // Go back to the editing form.
+ $this->clickLink('Back to content editing');
+ $new_test_text_2 = 'less_dummy_preview_text_2';
+
+ $edit = [
+ 'field_paragraphs[1][subform][field_text][0][value]' => $new_test_text_2,
+ ];
+ // Preview the article.
+ $this->drupalPostForm(NULL, $edit, t('Preview'));
+ $this->assertRaw($test_text_1);
+ $this->assertRaw($new_test_text_2);
+ // Go back to the editing form.
+ $this->clickLink('Back to content editing');
+ $paragraph_1 = $this->xpath('//*[@id="edit-field-paragraphs-0-subform-field-text-0-value"]')[0];
+ $paragraph_2 = $this->xpath('//*[@id="edit-field-paragraphs-1-subform-field-text-0-value"]')[0];
+ $this->assertEqual($paragraph_1['value'], $test_text_1);
+ $this->assertEqual($paragraph_2['value'], $new_test_text_2);
+ $this->drupalPostForm(NULL, [], t('Save and keep published'));
+
+ $this->assertRaw($test_text_1);
+ $this->assertRaw($new_test_text_2);
+ $this->assertRaw('Page_title');
+ }
+
+}