public function test_construct_placeholder() {
    do_action( 'customize_register', $this->wp_customize );
    $default = array(
      'name'        => 'Lorem \\o/',
      'description' => 'ipsum \\o/',
      'parent'      => 123,
    );
    $setting = new WP_Customize_Nav_Menu_Setting( $this->wp_customize, 'nav_menu[-5]', compact( 'default' ) );
    $this->assertSame( -5, $setting->term_id );
    $this->assertSame( $default, $setting->default );
  }