public void ShouldRenderOnce_WhenRenderingCalledMultipleTimes()
{
var child = new Mock <Element>();
child
.Setup(x => x.Measure(It.IsAny <Size>()))
.Returns(() => new FullRender(Size.Zero));
var element = new ShowOnce()
{
Child = child.Object
};
element.Draw(null, Size.Zero);
element.Draw(null, Size.Zero);
child.Verify(x => x.Draw(It.IsAny <ICanvas>(), It.IsAny <Size>()), Times.Once);
}
public static IContainer ShowOnce(this IContainer element)
{
var alignment = new ShowOnce();
return(element.Element(alignment));
}