public function test_original_title_prefix_should_not_be_shown_if_empty() {
    $expected = '';

    $post_id = $this->factory->post->create();

    $item = array(
      'classes'          => array(),
      'description'      => '',
      'ID'               => $post_id,
      'menu_item_parent' => 0,
      'menu_order'       => 0,
      'object_id'        => $post_id,
      'object'           => 'post',
      'post_excerpt'     => get_the_excerpt( $post_id ),
      'title'            => get_the_title( $post_id ),
      'type'             => 'foobar',
      'type_label'       => 'Foo Bar',
      'target'           => '_blank',
      'url'              => '',
      'xfn'              => '',
    );

    $this->walker->start_el( $expected, (object) $item );

    $this->assertDoesNotMatchRegularExpression( '#<p class="link-to-original">\s*Original: <a href=""></a>#', $expected );
  }