--- /dev/null
+<?php
+
+namespace Drupal\Tests\comment\Functional;
+
+use Drupal\comment\CommentManagerInterface;
+use Drupal\comment\Entity\Comment;
+use Drupal\user\RoleInterface;
+
+/**
+ * Tests comment statistics on nodes.
+ *
+ * @group comment
+ */
+class CommentStatisticsTest extends CommentTestBase {
+
+ /**
+ * A secondary user for posting comments.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $webUser2;
+
+ protected function setUp() {
+ parent::setUp();
+
+ // Create a second user to post comments.
+ $this->webUser2 = $this->drupalCreateUser([
+ 'post comments',
+ 'create article content',
+ 'edit own comments',
+ 'post comments',
+ 'skip comment approval',
+ 'access comments',
+ 'access content',
+ ]);
+ }
+
+ /**
+ * Tests the node comment statistics.
+ */
+ public function testCommentNodeCommentStatistics() {
+ $node_storage = $this->container->get('entity.manager')->getStorage('node');
+ // Set comments to have subject and preview disabled.
+ $this->drupalLogin($this->adminUser);
+ $this->setCommentPreview(DRUPAL_DISABLED);
+ $this->setCommentForm(TRUE);
+ $this->setCommentSubject(FALSE);
+ $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_THREADED, 'Comment paging changed.');
+ $this->drupalLogout();
+
+ // Checks the initial values of node comment statistics with no comment.
+ $node = $node_storage->load($this->node->id());
+ $this->assertEqual($node->get('comment')->last_comment_timestamp, $this->node->getCreatedTime(), 'The initial value of node last_comment_timestamp is the node created date.');
+ $this->assertEqual($node->get('comment')->last_comment_name, NULL, 'The initial value of node last_comment_name is NULL.');
+ $this->assertEqual($node->get('comment')->last_comment_uid, $this->webUser->id(), 'The initial value of node last_comment_uid is the node uid.');
+ $this->assertEqual($node->get('comment')->comment_count, 0, 'The initial value of node comment_count is zero.');
+
+ // Post comment #1 as web_user2.
+ $this->drupalLogin($this->webUser2);
+ $comment_text = $this->randomMachineName();
+ $this->postComment($this->node, $comment_text);
+
+ // Checks the new values of node comment statistics with comment #1.
+ // The node cache needs to be reset before reload.
+ $node_storage->resetCache([$this->node->id()]);
+ $node = $node_storage->load($this->node->id());
+ $this->assertEqual($node->get('comment')->last_comment_name, NULL, 'The value of node last_comment_name is NULL.');
+ $this->assertEqual($node->get('comment')->last_comment_uid, $this->webUser2->id(), 'The value of node last_comment_uid is the comment #1 uid.');
+ $this->assertEqual($node->get('comment')->comment_count, 1, 'The value of node comment_count is 1.');
+
+ // Prepare for anonymous comment submission (comment approval enabled).
+ $this->drupalLogin($this->adminUser);
+ user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
+ 'access comments' => TRUE,
+ 'post comments' => TRUE,
+ 'skip comment approval' => FALSE,
+ ]);
+ // Ensure that the poster can leave some contact info.
+ $this->setCommentAnonymous('1');
+ $this->drupalLogout();
+
+ // Post comment #2 as anonymous (comment approval enabled).
+ $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
+ $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', TRUE);
+
+ // Checks the new values of node comment statistics with comment #2 and
+ // ensure they haven't changed since the comment has not been moderated.
+ // The node needs to be reloaded with the cache reset.
+ $node_storage->resetCache([$this->node->id()]);
+ $node = $node_storage->load($this->node->id());
+ $this->assertEqual($node->get('comment')->last_comment_name, NULL, 'The value of node last_comment_name is still NULL.');
+ $this->assertEqual($node->get('comment')->last_comment_uid, $this->webUser2->id(), 'The value of node last_comment_uid is still the comment #1 uid.');
+ $this->assertEqual($node->get('comment')->comment_count, 1, 'The value of node comment_count is still 1.');
+
+ // Prepare for anonymous comment submission (no approval required).
+ $this->drupalLogin($this->adminUser);
+ user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
+ 'access comments' => TRUE,
+ 'post comments' => TRUE,
+ 'skip comment approval' => TRUE,
+ ]);
+ $this->drupalLogout();
+
+ // Post comment #3 as anonymous.
+ $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
+ $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', ['name' => $this->randomMachineName()]);
+ $comment_loaded = Comment::load($anonymous_comment->id());
+
+ // Checks the new values of node comment statistics with comment #3.
+ // The node needs to be reloaded with the cache reset.
+ $node_storage->resetCache([$this->node->id()]);
+ $node = $node_storage->load($this->node->id());
+ $this->assertEqual($node->get('comment')->last_comment_name, $comment_loaded->getAuthorName(), 'The value of node last_comment_name is the name of the anonymous user.');
+ $this->assertEqual($node->get('comment')->last_comment_uid, 0, 'The value of node last_comment_uid is zero.');
+ $this->assertEqual($node->get('comment')->comment_count, 2, 'The value of node comment_count is 2.');
+ }
+
+}