public void Cancel_AttendedGig_ShouldReturnOk()
        {
            _mockUnitOfWork.Setup(u => u.Attendances.GetAttendance(1, _userId))
            .Returns(new Attendance
            {
                GigId      = 1,
                AttendeeId = _userId
            });

            var result = _sut.Cancel(1);

            result.Should().BeOfType <OkObjectResult>();
        }
        public void Cancel_NoAttendanceWithGivenIdExists_ShouldReturnNotFound()
        {
            var result = _controller.Cancel(1);

            result.Should().BeOfType <NotFoundResult>();
        }