用 List 模拟一个方法<int>作为参数并使用 Moq 返回 List&lt;&gt;

Question

In my test, I defined as data a List<IUser> with some record in.

I'd like setup a moq for the method GetList, this method receives a List<int> as the parameter. This is a list of Ids; I'd like to return the IUser list with these Ids in the List<IUser>

I tried this but I don't find the right Returns syntax

Mock<IUsers> mockUserRepository = new Mock<IUsers>();
_mockUserRepository.Setup(m => m.GetListAll(It.IsAny<List<int>>())).Returns(????????);

I tried something like this :

_mockUserRepository.Setup(m => m.GetListAll(It.IsAny<List<int>>())).Returns(u =>_users.Contains(???));

Thanks,

class User : IUser
{
    public int Id { get; set; }
    public string Firsname { get; set; }
    public string Lastname { get; set; }
}

interface IUser
{
    int Id { get; set; }
    string Firsname { get; set; }
    string Lastname { get; set; }
}

interface IAction
{
    List<IUser> GetList(List<int> listId);
}

class Action : IAction
{

    public List<IUser> GetList(List<int> listId)
    {
        //....
    }
}

Answer 1

Try this:

mock.Setup(users => users.GetListAll(It.IsAny<List<int>>()))
            .Returns<List<int>>(ids =>
                {
                    return _users.Where(user => ids.Contains(user.Id)).ToList();
                });

Answer 2

If you have more as one filter parameter you can use this example

mock.Setup(o => o.GetListAllAsync(It.IsAny<List<int>>(), It.IsAny<string>())
 .ReturnsAsync((int[] ids, string firstname) =>
 {
   return _users
          .Where(user => ids.Contains(user.Id) && user.Firstname.Equals(firstname))
          .ToList();
 });

Answer 3

只需返回准备好的列表：

_mockUserRepository.Setup(m => m.GetListAll(It.IsAny<List<int>>())).Returns(_users);