public void WhenEndBeforeStart_ThenRangeRhrowsArgumentException()
{
Assert.Throws <ArgumentException>(
() => DateRange.DayRange(
new DateTime(2020, 1, 2, 0, 0, 0),
new DateTime(2020, 1, 1, 0, 0, 0),
1).ToList());
}
public void WhenStepPassesEndAndStepIsPositive_ThenRangeExcludesEnd()
{
var range = DateRange.DayRange(
new DateTime(2020, 1, 1, 0, 0, 0),
new DateTime(2020, 1, 4, 0, 0, 0),
2).ToList();
Assert.AreEqual(2, range.Count());
Assert.AreEqual(new DateTime(2020, 1, 1, 0, 0, 0), range[0]);
Assert.AreEqual(new DateTime(2020, 1, 3, 0, 0, 0), range[1]);
}
public void WhenStepPassesEndAndStepIsNegative_ThenRangeExcludesEnd()
{
var range = DateRange.DayRange(
new DateTime(2020, 1, 10, 0, 0, 0),
new DateTime(2020, 1, 5, 0, 0, 0),
-2).ToList();
Assert.AreEqual(3, range.Count());
Assert.AreEqual(new DateTime(2020, 1, 10, 0, 0, 0), range[0]);
Assert.AreEqual(new DateTime(2020, 1, 8, 0, 0, 0), range[1]);
Assert.AreEqual(new DateTime(2020, 1, 6, 0, 0, 0), range[2]);
}
public void WhenStartLessThanEnd_ThenRangeContainsAllDaysIncludingBounds()
{
var range = DateRange.DayRange(
new DateTime(2020, 1, 1, 0, 0, 0),
new DateTime(2020, 1, 3, 0, 0, 0),
1).ToList();
Assert.AreEqual(3, range.Count());
Assert.AreEqual(new DateTime(2020, 1, 1, 0, 0, 0), range[0]);
Assert.AreEqual(new DateTime(2020, 1, 2, 0, 0, 0), range[1]);
Assert.AreEqual(new DateTime(2020, 1, 3, 0, 0, 0), range[2]);
}
public void WhenStartEqualsEnd_ThenRangeContainsSingleRange()
{
var range = DateRange.DayRange(
new DateTime(2020, 1, 1, 0, 0, 0),
new DateTime(2020, 1, 1, 2, 3, 4),
1);
Assert.AreEqual(1, range.Count());
Assert.AreEqual(
new DateTime(2020, 1, 1, 0, 0, 0),
range.First());
}