Q: Verify with It.IsAny for structs?

[Muhomorik]

Hello,

I have a strange problem when I try to verify with It.IsAny on Struct in Loose mode.

Struct is from another library and I have no control over it. It is passed as out argument of a method.

I can verify the specific calls with specific values and it is correct, but when I use It.IsAny it always says 0 calls.

I can see that the Invocations are set and there is only one invocation with values that were actually set.
Is it some kind of limitation for structs?

Trace:

Moq.MockException : Must change next item.
Expected invocation on the mock once, but was 0 times: x => x.ItemSet(It.IsAny<DATETIME_STRUCT>(), True)

Configured setups: 
x => x.ItemSet(It.IsAny<DATETIME_STRUCT>(), True)

Performed invocations: 
MyItem.ItemSet(DATETIME_STRUCT, True)
   vid Moq.Mock.ThrowVerifyException(MethodCall expected, IEnumerable`1 setups, IEnumerable`1 actualCalls, Expression expression, Times times, Int32 callCount) i C:\projects\moq4\Source\Mock.cs:rad 473
   vid Moq.Mock.VerifyCalls(Mock targetMock, MethodCall expected, Expression expression, Times times) i C:\projects\moq4\Source\Mock.cs:rad 451
   vid Moq.Mock.Verify[T](Mock`1 mock, Expression`1 expression, Times times, String failMessage) i C:\projects\moq4\Source\Mock.cs:rad 312
   vid Moq.Mock`1.Verify(Expression`1 expression, Times times, String failMessage) i C:\projects\moq4\Source\Mock.Generic.cs:rad 479

[stakx]

Moq should support structs just fine. There's probably something wrong with your code. Could you please provide a small code example demonstrating the problem? Otherwise it's hard to say what exactly is going on.

[Muhomorik]

Hi,
Here is a repo (sorry for VB :) )

https://www.dropbox.com/s/uiq2gor85rb57r1/NUnitAndMoq.Tests.zip?dl=0

/ Best regards

[stakx]

_childMock.Verify(Sub(x) x.GetStructByRef(It.IsAny(Of StructOne)), Times.Once())

The method that you're setting up takes its argument by reference. It.IsAny(Of T) does not work as expected with by-ref parameters (and unlike in VB.NET, in C# you'd even get a compilation error). If you want to match any value for a by-ref parameter, use It.ByRef(Of StructOne).IsAny instead:

_childMock.Verify(Sub(x) x.GetStructByRef(It.Ref(Of StructOne).IsAny), Times.Once())