How to mock repository in unit test .net core?

ykl

340 Points

17 Posts

I'm trying to create unit test on service method Service.GetAllUser(). Service method using IUserRepository to fetch users. I'm trying as:

public class Tests
{
    private Mock<IUserRepository> _userRepository;
    private IService _service;

    [SetUp]
    public void Setup()
    {
        _userRepository = new Mock<IUserRepository>();
        _service = new Service(_userRepository.Oject);
    }

    [Test]
    public void ShouldReturnUsers()
    {

        var result = _service.GetAllUser();

        Assert.That(() => result, Is.TypeOf(IList<User>));
    }
}

It's failing on repository GetAll() method as null reference. I don't known what is missing.

Views: 8063
Total Answered: 2
Total Marked As Answer: 2
Posted On: 05-Jun-2020 20:43

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Answers

30 Points

0 Posts

You are missing mock setup. You can do something:

var user = new List<User>();
//populate with dummy user data
_userRepository.Setup(p => p.GetAll()).Returns(users);

Posted On: 08-Jun-2020 06:23

beginer

1576 Points

53 Posts

You can try following:

public class Tests
{
    private Mock<IUserRepository> _userRepository;
    private IService _service;

    [SetUp]
    public void Setup()
    {
        _userRepository = new Mock<IUserRepository>();
        _service = new Service(_userRepository.Oject);
    }

    [Test]
    public void ShouldReturnUsers()
    {
        var users = new List<User>(){
          //populate with dummy user data
        };

        _userRepository.Setup(p => p.GetAll()).Returns(users); 

        var result = _service.GetAllUser();

        Assert.That(() => result, Is.TypeOf(IList<User>));
    }
}