using Moq and Asserts on a saved object (saved via callback) after call, allows for nice seperation of Arrange,Act,Assert! from http://stackoverflow.com/questions/4956974/verifying-an-specific-parameter-with-moq

gistfile1.txt

// Arrange
MyObject saveObject;
mock.Setup(c => c.Method(It.IsAny<int>(), It.IsAny<MyObject>()))
        .Callback<int, MyObject>((i, obj) => saveObject = obj)
        .Returns("xyzzy");

// Act
// ...

// Assert
// Verify Method was called once only
mock.Verify(c => c.Method(It.IsAny<int>(), It.IsAny<MyObject>()), Times.Once());
// Assert stuff about saveObject
Assert.That(saveObject.TheProperty, Is.EqualTo(2));