public void ReturnFriendship_WhenFound() { // Arrange int currentUserId = 15; int friendId = 10; var mockedUserFriendRepository = new Mock <IEFRepository <UserFriend> >(); var friendships = new List <UserFriend>() { new UserFriend() { UserId = 1, FriendId = 3 }, new UserFriend() { UserId = currentUserId, FriendId = friendId }, new UserFriend() { UserId = 7, FriendId = 12 } }.AsQueryable(); mockedUserFriendRepository.Setup(x => x.All).Returns(friendships); var mockedUserRepository = new Mock <IEFRepository <CustomUser> >(); var mockedUserFriendFactory = new Mock <IUserFriendFactory>(); var mockedUnitOfWork = new Mock <IUnitOfWork>(); var friendService = new FriendService( mockedUserFriendRepository.Object, mockedUserRepository.Object, mockedUserFriendFactory.Object, mockedUnitOfWork.Object); // Act var result = friendService.GetFriendShip(currentUserId, friendId); // Assert Assert.AreEqual(result.UserId, currentUserId); Assert.AreEqual(result.FriendId, friendId); Assert.IsNotNull(result); Assert.IsInstanceOf <UserFriend>(result); }