public void GetUserById() { var demoDataContext = new Mock <BlogBDContext>(); // get data simulate on UsersTestData.GetUsersData() demoDataContext.Setup(x => x.Users).Returns(UnitTestHelpers.GetQueryableMockDbSet <Users>(UsersTestData.GetUsersData().ToList())); demoDataContext.Setup(x => x.Profiles).Returns(UnitTestHelpers.GetQueryableMockDbSet <Profiles>(ProfileTestData.GetProfilesData().ToList())); UsersRepository usersRepository = new UsersRepository(demoDataContext.Object); var result = usersRepository.GetUserById(2); Assert.AreEqual("Naruto", result.Username); }