如何使用TestProject中的NSubstitute将值设置为类的局部变量？

我需要使用NSubstitute进行模拟，并且需要将类LoanCreateHandler局部变量command设置为使用它的参数Z来模拟数据。 我有以下代码：

 public class ClassA { public string Prop1 { get; set; } public string Prop2 { get; set; } … // Here I have some other properties } public class CreateLoanCommand { public string X { get; set; } public string Y { get; set; } public ClassA Z { get; set; } } public class LoanCreateHandler { public Response Handle(LoanCreateRequest request) { var response = CreateTypedResponse(); var command = new CreateLoanCommand { X = request.X, Y = request.Y }; _cqsCommandProcessor.Execute(command); //here I am setting value of command.Z param if (command.Z == null) { //do something }else{ //do another } return true; // returns response } } 

所以这里当我想模拟LoanCreateHandler进行代码覆盖时。 其他循环代码未被涵盖。 请在下面找到unit testing：

 [TestClass] public class LoanCreateHandlerTests { [TestMethod, TestCategory(Tc.Unit)] public void LoanCreateHandler_SuccessTest() { var loanCreateRequest = new LoanCreateRequest { X = "val1", Y = "val2" }; var loanCreateResponse = true; var createLoanCommand = new CreateLoanCommand() { X = "val1", Y = "val2", Z = new ClassA() { Prop1 = "val1", Prop2 = "val2"… } }; _TestHelper.CqsCommandProcessor.Execute(Arg.Any()); var loanCreateHandler = new LoanCreateHandler(); loanCreateHandler.Handle(loanCreateRequest).Returns(loanCreateResponse); //here when call goes to Handle() method it creates new LoanCreateRequest object and I want to replace that object with my LoanCreateRequest object, which is created above. Assert.IsNotNull(loanCreateResponse); } } 

Answer 1

您应该使用When..Do回调来设置void方法。

我假设_TestHelper.CqsCommandProcessor返回LoanCreateHandler._cqsCommandProcessor所做的相同对象。

那就是说，你应该这样做：

 [TestClass] public class LoanCreateHandlerTests { [TestMethod, TestCategory(Tc.Unit)] public void LoanCreateHandler_SuccessTest() { var z = new ClassA() { Prop1 = "val1", Prop2 = "val2" }; _TestHelper.CqsCommandProcessor .When(x => x.Execute(Arg.Any())) .Do(x => x.Arg().Z = z); var loanCreateHandler = new LoanCreateHandler(); var loanCreateRequest = new LoanCreateRequest { X = "val1", Y = "val2" }; var loanCreateResponse = loanCreateHandler.Handle(loanCreateRequest); Assert.IsNotNull(loanCreateResponse); } }