[英]How to verify static method call using Moq
Using this approach I have made my static method calls an Action
in the hope that I can set and verify the call in my Moq unit test. 使用这种方法我已经让我的静态方法调用一个
Action
,希望我可以在我的Moq单元测试中设置和验证调用。
The code being tested is: 正在测试的代码是:
public Action<Data> Calculate = x => CalculatorHelper.Calculate(x);
public void CalculateData(Data data)
{
...
Calculate(data);
...
}
And the test is: 测试是:
[Test]
public void CalculateIsCalled()
{
_mockService.Setup(x => x.Calculate = CalculatorHelper.Calculate)
.Verifiable();
...
_mockService.VerifyAll();
}
However, the parameter in the Setup()
is throwing the compile error "an expression tree cannot contain an assignment operator". 但是,
Setup()
的参数抛出编译错误“表达式树不能包含赋值运算符”。
Obviously the code x => x.Calculate = CalculatorHelper.Calculate
is incorrect but what would the correct way to code this? 显然代码
x => x.Calculate = CalculatorHelper.Calculate
是不正确的但是正确的编码方式是什么?
Calculate
should return a new Action pointing to CalculatorHelper.Calculate
, so it should be: Calculate
应该返回一个指向CalculatorHelper.Calculate
的新Action,所以它应该是:
_mockService.Setup(x => x.Calculate).Returns(CalculatorHelper.Calculate)
.Verifiable();
However, for this to work, Calculate
needs to be a virtual
property, not just a field. 但是,要使其工作,
Calculate
需要是一个virtual
属性,而不仅仅是一个字段。
Considering the fact that Calculate
is public field, you don't even need Moq here (also assuming you are testing that CalculateData
calls the delegate): 考虑到
Calculate
是公共字段这一事实,你甚至不需要Moq(也假设你正在测试CalculateData
调用委托):
Data passedAsActionParameter = null;
var testedClass = new Calculator();
testedClass.Calculate = d => { passedAsActionParameter = d; };
var data = new Data();
testedClass.CalculateData(data);
Assert.That(passedAsActionParameter, Is.EqualTo(data));
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