public void TimePeriodRelationEndTouching()
        {
            DateTime start      = new DateTime(2018, 1, 1);
            DateTime end        = new DateTime(2018, 12, 31);
            var      timePeriod = new SimpleTimeLine.TimePeriod(start, end);

            DateTime start1 = new DateTime(2018, 12, 31);
            DateTime end1   = new DateTime(2019, 2, 1);
            var      test   = new SimpleTimeLine.TimePeriod(start1, end1);

            Assert.Equal(PeriodRelation.EndTouching, TimePeriodCalc.GetRelation(timePeriod, test));
        }
        public void TimePeriodRelationAfter()
        {
            DateTime start      = new DateTime(2018, 1, 1);
            DateTime end        = new DateTime(2018, 12, 31);
            var      timePeriod = new SimpleTimeLine.TimePeriod(start, end);

            DateTime start1      = new DateTime(2017, 2, 1);
            DateTime end1        = new DateTime(2017, 2, 20);
            var      timePeriod1 = new SimpleTimeLine.TimePeriod(start1, end1);

            Assert.Equal(PeriodRelation.After, TimePeriodCalc.GetRelation(timePeriod, timePeriod1));
        }