验证在单元测试中是否调用了一种方法 [英] Verify that either one method or the other was invoked in a unit test

问题描述

示例:

public bool Save(MyObj instance)
{
    if (instance.IsNew)
    {
        this.repository.Create(instance);
    }
    else
    {
        this.repository.Update(instance);
    }
}

如何在Moq中创建测试以验证:

How do I create a test in Moq that verifies:

1. 正在读取属性IsNew
2. 已调用Create()或Update()

1. that a property IsNew is being read
2. that either Create() or Update() has been invoked

推荐答案

不幸的是，我自己有解决方案.

Unfortunately I have a solution myself.

您要做的就是拥有一个设置为0的局部int变量，然后通过模拟对其进行递增.最后，您必须检查其名称是否大于0(或完全1，具体取决于问题).

All you have to do is to have a local int variable that you set to 0 and then mocking increments it. In the end you have to check whether its name is more than 0 (or exactly 1, depending on the problem).

// Arrange
int count = 0;
Mock<Repository> mock = new Mock<Repository>();
mock.Setup<bool>(m => m.Create(It.IsAny<MyObj>())).Callback(() => count++);
mock.Setup<bool>(m => m.Update(It.IsAny<MyObj>())).Callback(() => count++);
// Act
...
// Assert
Assert.AreEqual(count, 1);

将进行两次测试.一种将属性IsNew设置为true，另一种将其设置为false.

There would be two tests. One that sets property IsNew to true and one that sets it to false.

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