c# - 根据单元测试中传递的参数返回不同的模拟值与最小起订量

Question

我有一个名为 GetTasks() 的方法，它返回 10 个任务对象。我想为单元测试目的最小化此任务。这是代码:

 _crateRecallService.Setup(m => m.GetTasks(It.IsAny<int>(), It.IsAny<List<Stage>>(), It.IsAny<List<Severity>>())).Returns(new List<CrateRecallTaskWithComms>()
{
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "1", PkCTaskID = 1, CampaignId = 1, Severity = "High"}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "2", PkCTaskID = 2, CampaignId = 2, Severity = "High"}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "3", PkCTaskID = 3, CampaignId = 3, Severity = "High"}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "4", PkCTaskID = 4, CampaignId = 4}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "5", PkCTaskID = 5, CampaignId = 5}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "6", PkCTaskID = 6, CampaignId = 6}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "7", PkCTaskID = 7, CampaignId = 7}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "8", PkCTaskID = 8, CampaignId = 8}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "9", PkCTaskID = 9, CampaignId = 9}},
    new CrateRecallTaskWithComms() { CrateRecallTas = new CrateRecallTas() { CrateId = "10", PkCTaskID = 10, CampaignId = 10}}

});

这工作正常，但缺少一些东西。过滤任务严重性在这里不起作用。

我的问题是，如何设置 Moq，以便如果传入的严重性列表中有一个高严重性，它将返回 3 个任务而不是 10 个任务？所以换句话说，如果我通过它:

// Arrange
var severities = new List<Severity>() { Severity.High };

我想返回 3 个任务而不是 10 个。

Answer 1

Returns 不仅接受一个值，而且您还可以传递一个具有精确签名的委托(delegate)作为您的方法，实际参数将传递给该委托(delegate)。然后，您可以使用这些参数做任何您想做的事情。在你的情况下

 .Returns( (int i, List<Stage> stages, List<Severity> severities) =>
          {
              if ( severities.Contains(...) 
                 return ...
              else
                 ...
          } );