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

    $setting = new WP_Customize_Nav_Menu_Setting( $this->wp_customize, 'nav_menu[123]' );
    $this->assertSame( 'nav_menu', $setting->type );
    $this->assertSame( 'postMessage', $setting->transport );
    $this->assertSame( 123, $setting->term_id );
    $this->assertNull( $setting->previous_term_id );
    $this->assertNull( $setting->update_status );
    $this->assertNull( $setting->update_error );
    $this->assertIsArray( $setting->default );
    foreach ( array( 'name', 'description', 'parent' ) as $key ) {
      $this->assertArrayHasKey( $key, $setting->default );
    }
    $this->assertSame( '', $setting->default['name'] );
    $this->assertSame( '', $setting->default['description'] );
    $this->assertSame( 0, $setting->default['parent'] );

    $exception = null;
    try {
      $bad_setting = new WP_Customize_Nav_Menu_Setting( $this->wp_customize, 'foo_bar_baz' );
      unset( $bad_setting );
    } catch ( Exception $e ) {
      $exception = $e;
    }
    $this->assertInstanceOf( 'Exception', $exception );
  }