public function test_filter_comment_type_dropdown_should_be_shown_if_there_are_comments() {
    $post_id    = self::factory()->post->create();
    $comment_id = self::factory()->comment->create(
      array(
        'comment_post_ID'  => $post_id,
        'comment_approved' => '1',
      )
    );

    $this->table->prepare_items();

    ob_start();
    $this->table->extra_tablenav( 'top' );
    $output = ob_get_clean();

    $this->assertStringContainsString( 'id="filter-by-comment-type"', $output );
    $this->assertStringContainsString( "<option value='comment'>", $output );
  }