如何断言特定类的方法在另一个类的另一个方法之前被调用？

Question

这是我所拥有的一个示例：

public class ClassToBeTestedTest
{
    private Mock<IAService> aService;
    private Mock<IAnotherService> anotherService;
    private ClassToBeTested testedClass;

    [SetUp]
    public void setup()
    {
        aService = new Mock<IAService>();
        anotherService = new Mock<IAnotherService>();
        testedClass = new ClassToBeTested(aService.Object, anotherService.Object);
    }

    [Test]
    public void ShouldCallAServiceMethodBeforeAnotherService()
    {
        testedClass.Run();
        aService.Verify(x=>x.AMethod(), Times.Once());
        anotherService.Verify(x=>x.AnotherMethod(), Times.Once());
    }
}

在这个示例中，我只是检查它们是否被调用，而不管顺序...

我正在考虑在那些在测试类中添加某种序列控制的方法中设置回调...

编辑：我正在使用起订量库： http://code.google.com/p/moq/

Answer 1

Rhino Mocks 支持模拟中的顺序，请参见 http://www .ayende.com/Wiki/Rhino+Mocks+Ordered+and+Unordered.ashx

或者最小起订量序列，http://dpwhelan.com/blog/software-development/moq-sequences/

请参阅此处有关此问题的类似问题，如何使用最小起订量测试方法调用顺序

Answer 2

替代解决方案，验证在调用第二个方法时调用第一个方法：

public class ClassToBeTestedTest
{
    private Mock<IAService> aService;
    private Mock<IAnotherService> anotherService;
    private ClassToBeTested testedClass;

    [SetUp]
    public void setup()
    {
        aService = new Mock<IAService>();
        anotherService = new Mock<IAnotherService>();
        testedClass = new ClassToBeTested(aService.Object, anotherService.Object);
    }

    [Test]
    public void ShouldCallAServiceMethodBeforeAnotherService()
    {
        //Arrange
        anotherService.Setup(x=>x.AnotherMethod()).Callback(()=>{
            //Assert
            aService.Verify(x=>x.AMethod(), Times.Once());
        }).Verifyable();

        //Act
        testedClass.Run();
        //Assert
        anotherService.Verify();
    }
}

Answer 3

在每个模拟中记录时间戳并进行比较。

[Test]
public void ShouldCallAServiceMethodBeforeAnotherService()
{
    testedClass.Run();
    //Not sure about your mocking library but you should get the idea
    Assert(aService.AMethod.FirstExecutionTime 
        < anotherService.AnotherMethod.FirstExecutionTime, 
        "Second method executed before first");
}