public void containerHasChildrenReturnsTrueIfChildren()
    {
      Container container = new Container("chest");
      var entity = new Thing("cup");
      var item = container.AddChild(entity);

      Assert.That(container.HasChildren(), Is.True);
    }
    public void supporterHasChildrenReturnsFalseIfNoChildren()
    {
      Container container = new Container("chest");

      Assert.That(container.HasChildren(), Is.False);
    }