最小起订量和 C#：回调无效。带参数的方法设置无法调用带参数的回调

Question

实际的接口签名是这样的

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; });

设置在测试用例中抛出异常，如下所示

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

我做错了什么？

我已经验证Moq: Invalid callback. Setup on method with parameters cannot invoke callback with parameters

但我没有看到任何帮助。

Answer 1

如评论中所述，使用的 Callback 参数与方法定义不匹配。尽管 Setup 使用 It.IsAny<LoggingContext> 方法定义使用 ILoggingContext 参数

将t2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; 
    });

两种方法都行。

我还建议 Setup return 完成 Task 以便测试按预期异步进行。

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.

查看起订量 QuickStart 以更好地了解如何使用该框架。

最小起订量和 C#：回调无效。带参数的方法设置无法调用带参数的回调

Moq & C#: Invalid callback. Setup on method with parameters cannot invoke callback with parameters

c#

unit-testing

moq