使用Where()的Moq Return [英] Moq Return using Where()

问题描述

我正在尝试建立一个模拟以从集合中返回数据:

I'm trying to set up a mock to return data from a collection:

    private IList<DutyCategory> dutyCategories;
    private Mock<IDutyCategoryService> mockService;

    [TestInitialize()]
    public void UnitTestSetup()
    {
        dutyCategories = new List<DutyCategory>()
        {
            new DutyCategory(){Description = "Description",ID = 1,IsActive = true,Name = "Test 1",OrganizationID = 1}
        };
        mockService = new Mock<IDutyCategoryService>();
        mockService.Setup(a => a.GetDutyCategories()).ReturnsAsync(dutyCategories);
        mockService.Setup(a => a.GetDutyCategoriesByOrganization(It.IsAny<int>()))
            .ReturnsAsync((int id) => dutyCategories.Where(n=>n.OrganizationID == id));
    }

UnitTestSetup中的最后一行是问题所在.我收到以下错误:

That last line in the UnitTestSetup is the problem. I get the following error:

无法将lambda表达式转换为类型'System.Collections.Generic.IEnumerable'，因为它不是委托类型

Cannot convert lambda expression to type 'System.Collections.Generic.IEnumerable' because it is not a delegate type

我该如何模拟GetDutyCategoriesByOrganization，以便它返回列表勤奋类别的子集?

How do i mock GetDutyCategoriesByOrganization so that it returns a subset of list dutyCategories?

推荐答案

这似乎有效:

 .Returns<int>(i => Task.FromResult(dutyCategories.Where(n => n.OrganizationID == i)));

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