public void GetPeriodAmount_Returns_Correct_Amount()
        {
            var levyPeriod = new LevyPeriod(12345, "18-19", 1, DateTime.Parse("2018-04-01"), 30, DateTime.Now);

            Assert.AreEqual(levyPeriod.GetPeriodAmount(), 30);
        }
        public void GetLastTimeReceived_Returns_Null_If_No_Levy_Declared()
        {
            var levyPeriod = new LevyPeriod();

            Assert.IsNull(levyPeriod.GetLastTimeReceivedLevy());
        }
        public void GetPeriodAmount_Returns_0_If_No_Levy_Declared()
        {
            var levyPeriod = new LevyPeriod();

            Assert.AreEqual(levyPeriod.GetPeriodAmount(), 0);
        }