在单元测试中模拟Mapper.Map() [英] Mocking Mapper.Map() in Unit Testing

问题描述

我的控制器中有以下代码行，需要对此进行设置以进行单元测试.

I have following line of code in my controller and need to Setup this for Unit Test.

var result = data.ToList().Select(x=> this.mapper.Map<A_Class, B_Class>   (x)).ToList();

我在控制

  this.mapperMock.Setup(x => x.Map<A_Class, B_Class>(AAA)).Returns(expectedResult);

谁能建议应该是AAA，应该是什么?在我的控制器中，我的linq在Data中的A_Class的foreach对象起作用.如何在UnitTest中设置

Can anyone suggest what should be AAA and what should be expectedResult? In my controller my linq works foreach object of A_Class in Data. How can this be setup in UnitTest

推荐答案

如果无论传递了什么A_Class值，都要返回假的expectedResult:

If you want to return your fake expectedResult no matter what value of A_Class is passed:

mapperMock.Setup(x => x.Map<A_Class, B_Class>(It.IsAny<A_Class>))
          .Returns(expectedResult);

如果您想更具体一点，例如只需为属性的映射A_Class返回expectedResult:

If you want to be more specific, e.g. just return expectedResult for mapped A_Class with a property value of 'foo':

mapperMock.Setup(
         x => x.Map<A_Class, B_Class>(It.Is<A_Class>(_ => a.Property == "foo")))
    .Returns(expectedResult);

请注意，如果没有设置匹配，Moq将返回默认值，对于引用类型，默认值为null.

Note that if no setup matches, Moq will return a default value, which will be null for a reference type.

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