多个 Moq It.Is<string>() 匹配参数 [英] Multiple Moq It.Is&lt;string&gt;() Matching Arguments

问题描述

对于 Moq，有多个匹配参数是否有效?

With Moq, is it valid to have more than one Matching Argument?

It.Is<string>() 

在此示例中，我希望 mockMembershipService 根据提供的用户返回不同的 ProviderUserKey.

In this example I want the mockMembershipService to return a different ProviderUserKey depending on the User supplied.

mockMembershipService.Setup(
    x => x.GetUser(
      It.Is<string>(
        s => s.Contains("Joe")))
   .ProviderUserKey)
.Returns("1234abcd");


mockMembershipService.Setup(
  x => x.GetUser(
    It.Is<string>(
      s => s.Contains("Tracy")))
  .ProviderUserKey)
.Returns("5678efgh");

SetUp 默认为第二个语句，而不是根据其自身的优点评估每个语句.

The SetUp defaults to the second statement rather than evaluating each on its own merits.

推荐答案

是不是很混乱?您正在尝试模拟 GetUser 方法，但您为该函数的返回值属性设置了 Returns.您还想根据模拟方法声明返回类型的属性.

Isn't it confusing? You are trying to mock GetUser method but you set the Returns for that function's return value's property. You also want to state return type's property based on mocked method.

这里有一个更清晰的方法:

Here's a way a more clear way:

mockMembershipService.Setup(x => x.GetUser(It.IsAny<string>())
                     .Returns<string>(GetMembershipUser);

这是创建成员资格模拟的方法:

Here's a method to create the membership mock:

private MembershipUser GetMembershipUser(string s)
{
    Mock<MembershipUser> user =new Mock<MembershipUser>();
    user.Setup(item => item.ProviderUserKey).Returns(GetProperty(s));
    return user.Object;
}

然后编写一个方法来设置该属性:

Then you write a method for setting that property:

private string GetProperty(string s)
{
    if(s.Contains("Joe"))
        return "1234abcd";
    else if(s.Contains("Tracy"))
        return "5678efgh";
}

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