Tests for comment counters on the tracker listing.
function testTrackerNewComments() {
  $this
    ->drupalLogin($this->user);
  $node = $this
    ->drupalCreateNode(array(
    'comment' => 2,
    'title' => $this
      ->randomName(8),
  ));
  // Add a comment to the page.
  $comment = array(
    'subject' => $this
      ->randomName(),
    'comment_body[' . Language::LANGCODE_NOT_SPECIFIED . '][0][value]' => $this
      ->randomName(20),
  );
  // The new comment is automatically viewed by the current user.
  $this
    ->drupalPost('comment/reply/' . $node->nid, $comment, t('Save'));
  $this
    ->drupalLogin($this->other_user);
  $this
    ->drupalGet('tracker');
  $this
    ->assertText('1 new', 'New comments are counted on the tracker listing pages.');
  $this
    ->drupalGet('node/' . $node->nid);
  // Add another comment as other_user.
  $comment = array(
    'subject' => $this
      ->randomName(),
    'comment_body[' . Language::LANGCODE_NOT_SPECIFIED . '][0][value]' => $this
      ->randomName(20),
  );
  // If the comment is posted in the same second as the last one then Drupal
  // can't tell the difference, so we wait one second here.
  sleep(1);
  $this
    ->drupalPost('comment/reply/' . $node->nid, $comment, t('Save'));
  $this
    ->drupalLogin($this->user);
  $this
    ->drupalGet('tracker');
  $this
    ->assertText('1 new', 'New comments are counted on the tracker listing pages.');
}