最小起订量C#:无效的回调.具有参数的方法上的设置无法调用具有参数的回调 [英] Moq & C#: Invalid callback. Setup on method with parameters cannot invoke callback with parameters

问题描述

实际的接口签名是这样的

The actual interface signature goes like this

Task<GeneralResponseType> UpdateAsync(ICustomerRequest<IEnumerable<CustomerPreference>> request, CancellationToken cancellationToken, ILoggingContext loggingContext = null);

测试用例:

ICustomerRequest<IEnumerable<CustomerPreference>> t = null;
CancellationToken t1 = new CancellationToken();
LoggingContext t2 = null;
this.customerPreferenceRepositoryMock.Setup(x => x.UpdateAsync(
        It.IsAny<ICustomerRequest<IEnumerable<CustomerPreference>>>(),
        It.IsAny<CancellationToken>(),
        It.IsAny<LoggingContext>()))
    .Callback<ICustomerRequest<IEnumerable<CustomerPreference>>,CancellationToken, LoggingContext>((a, b, c) => { t = a ; t1 =b;t2= c; });

安装程序在测试用例中引发异常，如下所示

The setup is throwing an exception in the testcase,as below

无效的回调.使用参数设置方法 (ICustomerRequest 1,CancellationToken,ILoggingContext) cannot invoke callback with parameters (ICustomerRequest 1，CancellationToken，LoggingContext).

Invalid callback. Setup on method with parameters (ICustomerRequest1,CancellationToken,ILoggingContext) cannot invoke callback with parameters (ICustomerRequest1,CancellationToken,LoggingContext).

我在做什么错?

我已验证 Moq:无效的回调.具有参数的方法上的设置无法调用具有参数的回调

但是我没有看到任何帮助.

But I didn't see any help.

推荐答案

如注释中所述，所使用的Callback参数与方法定义不匹配.即使Setup使用It.IsAny<LoggingContext>，方法定义也使用ILoggingContext参数

As mentioned in the comments the Callback parameters used do not match the method definition. Even though the Setup uses It.IsAny<LoggingContext> the method definition uses ILoggingContext parameter

将t2更改为

ILoggingContext t2 = null;

并将Callback更新为

.Callback<ICustomerRequest<IEnumerable<CustomerPreference>>,CancellationToken, ILoggingContext>((a, b, c) => { 
    t = a; 
    t1 = b;
    t2 = c; 
});

或

.Callback((ICustomerRequest<IEnumerable<CustomerPreference>> a, 
           CancellationToken b, 
           ILoggingContext c) => { 
        t = a; 
        t1 = b;
        t2 = c; 
    });

这两种方法都可以.

我还建议Setup返回完整的Task，以便允许测试按预期方式异步进行.

I would also advise that the Setup return a completed Task so as to allow for the test to flow asynchronously as expected.

this.customerPreferenceRepositoryMock
    .Setup(x => x.UpdateAsync(
        It.IsAny<ICustomerRequest<IEnumerable<CustomerPreference>>>(),
        It.IsAny<CancellationToken>(),
        It.IsAny<LoggingContext>()))
    .Callback((ICustomerRequest<IEnumerable<CustomerPreference>> a, 
               CancellationToken b, 
               ILoggingContext c) => { 
                    t = a; 
                    t1 = b;
                    t2 = c; 
                    //Use the input to create a response
                    //and pass it to the `ReturnsAsync` method
             })
    .ReturnsAsync(new GeneralResponseType()); //Or some pre initialized derivative.

查看Moq的快速入门，以更好地了解如何使用该框架.

Review Moq's QuickStart to get a better understanding of how to use the framework.

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