我有一个看似这样的模拟方法:
class NotMineClass {
T Execute(Func operation)
{
// do something
return operation();
}
}
在我的代码中,我这样做:
public MyType MyMethod()
{
MyType object = new MyType();
bool success = notMineClassInstance.Execute(() =>
{
// some things
retVal = injectedObject1.method();
object.attribute = injectedObject2.method();
// some other things
return retVal;
}
if (success)
{
object.otherAttribute = someValue;
}
return object;
}
我的情况是,我正在使用Moq测试MyMethod,我想验证Func行为是否符合预期。我体内有一些被注射的物体,它们是模拟物,应该经过验证;它也开始构建我的返回值,所以除非我调用作为参数传递的函数,否则我不能做任何断言。
在Java和jUnit + EasyMock中,我会捕获传递的参数,如下所示:
public void testMyMethod() {
// ...
Capture < Function < void, Boolean > > functionCapture = Captures.last();
expect(notMineClassInstance.execute(EasyMock.capture(functionCapture)));
// Expectations for the body of the function
replay();
functionCapture.getValue().apply(null);
}
如何使用C#+ Moq进行相同操作?
答案 0 :(得分:10)
为方法提供Returns
时,您可以捕获调用参数:
Mock<NotMineClassInstance> mock = new Mock<NotMineClassInstance>();
mock.Setup(x => x.Execute<bool>(It.IsAny<Func<bool>>()))
.Returns((Func<bool> captured) => { captured(); return true; });
以下是您的代码的完整测试:
[Test]
public void TestingSomething()
{
// Arrange
Mock<NotMineClassInstance> mockNotMine = new Mock<NotMineClassInstance>();
mockDep.Setup(x => x.Execute<bool>(It.IsAny<Func<bool>>())).Returns((Func<bool> func) => func());
Mock<Injected1> mockInjected1 = new Mock<Injected1>();
mockInjected1.Setup(i => i.Method()).Returns(true);
Mock<Injected2> mockInjected2 = new Mock<Injected2>();
mockInjected2.Setup(i => i.Method()).Returns("xxx");
YourClass yourObject = new YourClass(mockDep.Object, mockInjected1.Object, mockInjected2.Object);
// Act
MyType my = yourObject.MyMethod();
// Assert
mockNotMine.Verify(d => d.Execute<bool>(It.IsAny<Func<bool>>()));
mockInjected1.Verify(i => i.Method());
mockInjected2.Verify(i => i.Method());
Assert.That(my.Attribute, Is.EqualTo("xxx"));
Assert.That(my.OtherAttribute, Is.EqualTo(someValue));
}
当mockInjected1.Method返回false时,你还需要测试大小写。