public void ToString_EqualsExpectedResult(QuarterHourTestItem <string> testItem)
        {
            var quarterHour = testItem.Create();
            var formatted   = quarterHour.ToString();

            Assert.AreEqual(testItem.ExpectedResult, formatted);
        }
        public void Parse_EqualsExpectedResult(QuarterHourTestItem <string> testItem)
        {
            var quarterHourFromText = QuarterHour.Parse(testItem.ExpectedResult); // TODO bad use of Expected result?
            var expectedQuarterHour = testItem.Create();

            Assert.AreEqual(expectedQuarterHour, quarterHourFromText);
        }