public void GenerateEventsForActivitiesAndDateRange_NoDates_Test()
        {
            // Arrange
            var start = DateTime.Today;
            var end   = start.AddDays(-1);

            var events = _sut.GenerateEventsForActivitiesAndDateRange(new List <Activity>(),
                                                                      start, end);

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