public async Task CanRetrieveCommittedShiftsWhenNone()
        {
            var traineeUserId   = 1;
            var patrolId        = 1;
            var availableShifts = await _shiftRepository.GetCommittedTrainerShiftsForTrainee(patrolId, traineeUserId, DateTime.Now);

            Assert.AreEqual(0, availableShifts.Count());
        }