public void Size_Method()
{
Assert.Throws <ArgumentNullException>(() => IYandexMoneyButtonWidgetExtensions.Size(null, YandexMoneyButtonSize.Large));
new YandexMoneyButtonWidget().Do(widget =>
{
Assert.True(ReferenceEquals(widget.Size(YandexMoneyButtonSize.Large), widget));
Assert.Equal("l", widget.Size());
});
new YandexMoneyButtonWidget().Do(widget => Assert.Equal("m", widget.Size(YandexMoneyButtonSize.Medium).Size()));
new YandexMoneyButtonWidget().Do(widget => Assert.Equal("s", widget.Size(YandexMoneyButtonSize.Small).Size()));
}
