Verifying method calls with Moq

moq_verifications.cs

    [Test]
    public void UsingMoqWithVerifications()
    {
        // Arrange
        var dependency = new Mock<IDependency>();

        // unfortunately there does not seem to be a simple way to set multiple return values with Moq...
        var returnValues = new[] {7, 3};
        var index = -1;
        dependency.Setup(x => x.DoSomething(It.IsAny<SomeComplexType>(), It.IsAny<int>()))
                .Returns(() => returnValues[++index]);

        // Act
        var systemUnderTest = new SystemUnderTest(dependency.Object);
        var returned = systemUnderTest.MethodUnderTest("MyData", 1234);

        // Assert 
        // (note: it would be even better to move the asserts to seperate tests and put the Arrange/Act part in a TextFixtureSetUp)

        Assert.AreEqual(10, returned);

        // Verify lets us check the arguments of the expected method calls using lambda expressions through the "It." class
        dependency.Verify(
            x => x.DoSomething(It.Is((SomeComplexType arg1) => arg1.stringData == "Sending MyData"), 1111), 
            Times.Once());
        dependency.Verify(
            x => x.DoSomething(It.Is((SomeComplexType arg1) => arg1.stringData == "Sending 1234"), 2222), 
            Times.Once());
    }