public void GetSpan_Always_InvokesGetValueWithSpanProperty(double value)
{
var uut = new FrameworkElement();
uut.SetValue(StretchPanel.SpanProperty, value);
StretchPanel.GetSpan(uut).ShouldBe(value);
}
public StretchPanel ConstructUUT()
{
var uut = new StretchPanel();
uut.Orientation = orientation;
children?.ForEach(x => uut.Children.Add(x));
return(uut);
}
public void SetSpan_ValueIsNegative_ThrowsException(double value)
{
var uut = new FrameworkElement();
var result = Should.Throw <ArgumentException>(() =>
{
StretchPanel.SetSpan(uut, value);
});
result.ShouldSatisfyAllConditions(
() => result.Message.ShouldContain(StretchPanel.SpanProperty.Name),
() => result.Message.ShouldContain(value.ToString()));
}
/**********************************************************************/
#region Test Procedures
private static FakeFrameworkElement[] MakeFakeChildren(IEnumerable <double> eachSpan)
=> eachSpan.Select(x => new { Element = new FakeFrameworkElement(), Span = x })
.Do(x => StretchPanel.SetSpan(x.Element, x.Span))
.Select(x => x.Element)
.ToArray();
public void ArrangeOverride_OrientationIsHorizontal_InvokesChildrenEachArrangeWithFinalRectSizeExpected(double finalSizeWidth, double finalSizeHeight, params double[] childrenEachSpan)
{
var context = new TestContext()
{
orientation = Orientation.Horizontal,
children = MakeFakeChildren(childrenEachSpan)
};
var uut = context.ConstructUUT();
var totalSpan = childrenEachSpan.Sum();
var finalSize = new Size(finalSizeWidth, finalSizeHeight);
uut.Arrange(new Rect(finalSize));
context.children.ShouldSatisfyAllConditions(
() => context.children.ForEach(x => x.ActualWidth.ShouldBe(finalSizeWidth * StretchPanel.GetSpan(x) / totalSpan)),
() => context.children.ForEach(x => x.ActualHeight.ShouldBe(finalSizeHeight)));
}
public void MeasureOverride_OrientationIsHorizontal_InvokesChildrenEachMeasure(double availableSizeWidth, double availableSizeHeight, params double[] childrenEachSpan)
{
var context = new TestContext()
{
orientation = Orientation.Horizontal,
children = MakeFakeChildren(childrenEachSpan)
};
var uut = context.ConstructUUT();
var totalSpan = childrenEachSpan.Sum();
var availableSize = new Size(availableSizeWidth, availableSizeHeight);
uut.Measure(availableSize);
context.children.ShouldSatisfyAllConditions(
() => context.children.ForEach(x => x.MeasureOverride_AvailableSize.Width.ShouldBe(availableSizeWidth * StretchPanel.GetSpan(x) / totalSpan)),
() => context.children.ForEach(x => x.MeasureOverride_AvailableSize.Height.ShouldBe(availableSizeHeight)));
}
