Moq + Unit Testing - System.Reflection.TargetParameterCountException: Parameter count mismatch

Question

I\'m tring to use a lambda with a multiple-params function but Moq throws this exception at runtime when I attempt to call the mock.Object.Convert(value, null, null, n

Answer 1

It's your Returns clause. You have a 4 parameter method that you're setting up, but you're only using a 1 parameter lambda. I ran the following without issue:

[TestMethod]
public void IValueConverter()
{
    var myStub = new Mock();
    myStub.Setup(conv => conv.Convert(It.IsAny