public void DayStartTest() { TimeTool.DayStart(testTime).Should().Be(testTime.Date); TimeTool.DayStart(testTime).TimeOfDay.Should().Be(TimeSpan.Zero); TimeTool.DayStart(nowTime).Should().Be(nowTime.Date); TimeTool.DayStart(nowTime).TimeOfDay.Should().Be(TimeSpan.Zero); }