--- /dev/null
+<?php
+
+namespace Drupal\Tests\comment\Functional\Views;
+
+use Drupal\comment\Entity\Comment;
+use Drupal\Core\Render\RenderContext;
+use Drupal\Core\Session\AnonymousUserSession;
+use Drupal\user\RoleInterface;
+use Drupal\views\Views;
+
+/**
+ * Tests the comment field name field.
+ *
+ * @group comment
+ */
+class CommentFieldNameTest extends CommentTestBase {
+
+ /**
+ * Views used by this test.
+ *
+ * @var array
+ */
+ public static $testViews = ['test_comment_field_name'];
+
+ /**
+ * The second comment entity used by this test.
+ *
+ * @var \Drupal\comment\CommentInterface
+ */
+ protected $customComment;
+
+ /**
+ * The comment field name used by this test.
+ *
+ * @var string
+ */
+ protected $fieldName = 'comment_custom';
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp($import_test_views = TRUE) {
+ parent::setUp($import_test_views);
+ $this->addDefaultCommentField('node', 'page', $this->fieldName);
+ $this->customComment = Comment::create([
+ 'entity_id' => $this->nodeUserCommented->id(),
+ 'entity_type' => 'node',
+ 'field_name' => $this->fieldName,
+ ]);
+ $this->customComment->save();
+ }
+
+ /**
+ * Test comment field name.
+ */
+ public function testCommentFieldName() {
+ /** @var \Drupal\Core\Render\RendererInterface $renderer */
+ $renderer = \Drupal::service('renderer');
+ // Grant permission to properly check view access on render.
+ user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access comments']);
+ $this->container->get('account_switcher')->switchTo(new AnonymousUserSession());
+ $view = Views::getView('test_comment_field_name');
+ $this->executeView($view);
+
+ $expected_result = [
+ [
+ 'cid' => $this->comment->id(),
+ 'field_name' => $this->comment->getFieldName(),
+ ],
+ [
+ 'cid' => $this->customComment->id(),
+ 'field_name' => $this->customComment->getFieldName(),
+ ],
+ ];
+ $column_map = [
+ 'cid' => 'cid',
+ 'comment_field_data_field_name' => 'field_name',
+ ];
+ $this->assertIdenticalResultset($view, $expected_result, $column_map);
+
+ // Test that data rendered.
+ $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($view) {
+ return $view->field['field_name']->advancedRender($view->result[0]);
+ });
+ $this->assertEqual($this->comment->getFieldName(), $output);
+ $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($view) {
+ return $view->field['field_name']->advancedRender($view->result[1]);
+ });
+ $this->assertEqual($this->customComment->getFieldName(), $output);
+ }
+
+}