public void IsSingleChain_Not_Allowed_When_There_Are_No_Ranges()
{
var collection = new DateRangeCollection();
Action action = () => collection.IsSingleChain();
action.Should().Throw <InvalidOperationException>();
}
public void Chain_With_Unbounded_Ranges_Creates_Always_Single_Chain()
{
var collection = new DateRangeCollection
{
new DateRange(null, new DateTime(2017, 12, 31)),
new DateRange(new DateTime(2018, 1, 1), null),
};
collection.IsSingleChain().Should().BeTrue();
collection.GetSingleChain().Should().Be(DateRange.Always);
}
public void IsChain_With_Non_Adjacent_Ranges_Should_Be_False()
{
var collection = new DateRangeCollection
{
DateRange.Year(2016),
DateRange.Year(2018),
DateRange.Year(2019),
};
collection.IsSingleChain().Should().BeFalse();
collection.GetSingleChain().IsEmpty.Should().BeTrue();
}
public void IsChain_With_Adjacent_Ranges_Should_Be_True()
{
var collection = new DateRangeCollection
{
DateRange.Year(2016),
DateRange.Year(2018),
DateRange.Year(2017),
};
collection.IsSingleChain().Should().BeTrue();
collection.GetSingleChain().Should().Be(DateRange.Years(2016, 3));
}