在Moq中模拟测试对象的方法? [英] Mock a method of the subject under test in Moq?
问题描述
我想测试我类的方法A,但不调用通常由A调用的实际方法B.这是因为B有很多我现在不想测试的外部交互.
I want to test method A of my class, but without calling the actual method B which is normally called by A. That's because B has a lot of external interactions I don't want to test for now.
我可以为B调用的所有服务创建模拟,但这是很多工作.我宁愿模拟B并使其返回样本数据.
I could create mocks for all the services called by B, but that's quite some work. I'd rather just mock B and make it return sample data.
这可能与Moq框架有关吗?
Is that possible to do with Moq framework?
推荐答案
确实如此!
您必须确保方法B
是虚拟的并且可以被覆盖.
It is, with a catch!
You have to make sure method B
is virtual and can be overriden.
然后,将模拟程序设置为在未提供设置时调用基本方法.然后,您设置B
,但不设置A
.由于未设置A
,因此将调用实际的实现.
Then, set the mock to call the base methods whenever a setup is not provided. Then you setup B
, but don't setup A
. Because A
was not setup, the actual implementation will be called.
var myClassMock = new Mock<MyClass>();
myClassMock.Setup(x => x.B()); //mock B
myClassMock.CallBase = true;
MyClass obj = myClassMock.Object;
obj.A(); // will call the actual implementation
obj.B(); // will call the mock implementation
在后台,Moq将动态创建一个扩展MyClass
并覆盖B
的类.
Behinds the scenes, Moq will dynamically create a class that extends MyClass
and overrides B
.
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