public void UserRepository_IsUser() { const string userId = "user"; MockUnitOfWorkFactory unitOfWorkFactory = new MockUnitOfWorkFactory(uow => { }); unitOfWorkFactory.AddMockFunction<bool>(); IUserRepository repository = new UserRepository(unitOfWorkFactory.UnitOfWorkFactory, Utility.StandardMapper); bool result = repository.IsUser(userId); Assert.IsFalse(result); unitOfWorkFactory.MockUnitOfWork.Verify(x => x.Exists(It.IsAny<Expression<Func<AspNetUserRole, bool>>>()), Times.Once); }