public T Calculate()
{
IUIElement uieToExamine = thisUIElementToExamine;
while (true)
{
IUIElement parentUIE = uieToExamine.GetParentUIE();
if (parentUIE != null)
{
if (parentUIE is T)
{
return((T)parentUIE);
}
else
{
uieToExamine = parentUIE;
}
}
else
{
break;
}
}
return(null);
}
public void Calculate_NoParentUIE_ReturnsNull()
{
IUIElement uie = Substitute.For <IUIElement>();
IUIElement parent = null;
uie.GetParentUIE().Returns(parent);
IProximateParentTypedUIECalculator <ISomeTestUIElement> calculator = new ProximateParentTypedUIECalculator <ISomeTestUIElement>(uie);
Assert.That(calculator.Calculate(), Is.Null);
}
public void Calculate_HasScrollerParentDirectlyAbove_ReturnsIt()
{
IUIElement uie = Substitute.For <IUIElement>();
ISomeTestUIElement typedParent = Substitute.For <ISomeTestUIElement>();
IUIElement nullParent = null;
uie.GetParentUIE().Returns(typedParent);
typedParent.GetParentUIE().Returns(nullParent);
IProximateParentTypedUIECalculator <ISomeTestUIElement> calculator = new ProximateParentTypedUIECalculator <ISomeTestUIElement>(uie);
Assert.That(calculator.Calculate(), Is.SameAs(typedParent));
}
public void Calculate_HasMultipleScrollerParentAbove_ReturnsTheColosest()
{
IUIElement uie = Substitute.For <IUIElement>();
ISomeTestUIElement closeTypedParent = Substitute.For <ISomeTestUIElement>();
ISomeTestUIElement farTypedParent = Substitute.For <ISomeTestUIElement>();
IUIElement nullParent = null;
uie.GetParentUIE().Returns(closeTypedParent);
closeTypedParent.GetParentUIE().Returns(farTypedParent);
farTypedParent.GetParentUIE().Returns(nullParent);
IProximateParentTypedUIECalculator <ISomeTestUIElement> calculator = new ProximateParentTypedUIECalculator <ISomeTestUIElement>(uie);
Assert.That(calculator.Calculate(), Is.SameAs(closeTypedParent));
}
