public function test_preview_updated() {
    do_action( 'customize_register', $this->wp_customize );

    $menu_id    = wp_update_nav_menu_object(
      0,
      wp_slash(
        array(
          'menu-name'   => 'Name 1 \\o/',
          'description' => 'Description 1 \\o/',
          'parent'      => 0,
        )
      )
    );
    $setting_id = "nav_menu[$menu_id]";
    $setting    = new WP_Customize_Nav_Menu_Setting( $this->wp_customize, $setting_id );

    $nav_menu_options = $this->get_nav_menu_items_option();
    $this->assertNotContains( $menu_id, $nav_menu_options['auto_add'] );

    $post_value = array(
      'name'        => 'Name 2 \\o/',
      'description' => 'Description 2 \\o/',
      'parent'      => 1,
      'auto_add'    => true,
    );
    $this->wp_customize->set_post_value( $setting_id, $post_value );

    $value = $setting->value();
    $this->assertSame( 'Name 1 \\o/', $value['name'] );
    $this->assertSame( 'Description 1 \\o/', $value['description'] );
    $this->assertSame( 0, $value['parent'] );

    $term = (array) wp_get_nav_menu_object( $menu_id );

    $this->assertSameSets(
      wp_array_slice_assoc( $value, array( 'name', 'description', 'parent' ) ),
      wp_array_slice_assoc( $term, array( 'name', 'description', 'parent' ) )
    );

    $setting->preview();
    $value = $setting->value();
    $this->assertSame( 'Name 2 \\o/', $value['name'] );
    $this->assertSame( 'Description 2 \\o/', $value['description'] );
    $this->assertSame( 1, $value['parent'] );
    $term = (array) wp_get_nav_menu_object( $menu_id );
    $this->assertSameSets( $value, wp_array_slice_assoc( $term, array_keys( $value ) ) );

    $menu_object = wp_get_nav_menu_object( $menu_id );
    $this->assertEquals( (object) $term, $menu_object );
    $this->assertSame( $post_value['name'], $menu_object->name );

    $nav_menu_options = get_option( 'nav_menu_options', array( 'auto_add' => array() ) );
    $this->assertContains( $menu_id, $nav_menu_options['auto_add'] );

    $menus     = wp_get_nav_menus();
    $menus_ids = wp_list_pluck( $menus, 'term_id' );
    $i         = array_search( $menu_id, $menus_ids, true );
    $this->assertIsInt( $i, 'Update-previewed menu does not appear in wp_get_nav_menus()' );
    $filtered_menu = $menus[ $i ];
    $this->assertSame( 'Name 2 \\o/', $filtered_menu->name );
  }