最小起订量的链接方法

Question

我正在尝试使用 Moq 模拟和设置链式方法。

这是我试图模拟的方法：

TeamMember teamMember = _unitOfWork
    .TeamMembers
    .Query()
    .ToList()
    .Where(t => t.AssociationCode.ToString() == code 
        && Crypto.EncryptStringAES(t.Id.ToString(), sharedSecret) == hash)
    .SingleOrDefault();

这里是我尝试模拟它的地方：

var unitOfWorkMock = new Mock<IUnitOfWork>();
var iQueryableMock = new Mock<IQueryable<TeamMember>>();
var iToListMock = new Mock<List<TeamMember>>();
var whereMock = new Mock<IList<TeamMember>>();
var singleMock = new Mock<IEnumerable<TeamMember>>();

unitOfWorkMock
    .Setup(u => u.TeamMembers
        .Query())
        .Returns(iQueryableMock.Object);

iQueryableMock
    .Setup(i => i.ToList())
        .Returns(iToListMock.Object); //This line throws the error

whereMock
    .Setup(w =>
            w.Where(It.IsAny<Func<TeamMember, bool>>()))
        .Returns(singleMock.Object);

singleMock
    .Setup(s =>
            s.SingleOrDefault())
        .Returns(new TeamMember()
        {
            Email = "Test@TeamMember.com"
        });

当我运行这个测试时它给我这个错误：

Expression references a method that does not belong to the mocked object: i => i.ToList<TeamMember>()

我已经看过 this question 并尝试做类似的事情，但我一定遗漏了一些东西。

我是新手，所以如果有人能帮助我，我将不胜感激。

Answer 1

你的方法链模拟看起来不错，但你的问题是ToList is an extension method, which Moq cannot mock。

最小起订量的链接方法

Chaining methods with Moq

c#

unit-testing

moq

mocking