public void GetAllUserTests_WithCorrectData_UserTestsMustBeReceived()
        {
            var             uow = new Mock <IUnitOfWork>();
            UserTestService uts = new UserTestService(uow.Object);

            uow.Setup(x => x.UserTests.GetAll()).Returns(new List <UserTest>());
            uow.Setup(x => x.Tests.GetAll()).Returns(new List <Test>());
            uow.Setup(x => x.Users.GetAll()).Returns(new List <User>());

            var expected = JsonConvert.SerializeObject(new List <UserTest>());
            var actual   = JsonConvert.SerializeObject(uts.GetAllUserTests());

            Assert.Equal(expected, actual);
        }