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(((datetime) date time datetime
month-stream in-date-range? timespan-overlaps?)
((srfi srfi-41) stream->list stream-take
))
(test-assert "jan->dec"
(stream->list (stream-take 11 (month-stream #2020-01-01))))
(test-assert "dec->jan"
(stream->list (stream-take 2 (month-stream #2020-12-01))))
(test-assert "dec->feb"
(stream->list (stream-take 3 (month-stream #2020-12-01))))
(test-assert "20 months"
(stream->list (stream-take 20 (month-stream #2020-01-01))))
(test-equal "Correct months"
(list #2020-02-01 #2020-03-01 #2020-04-01 #2020-05-01 #2020-06-01 #2020-07-01 #2020-08-01 #2020-09-01 #2020-10-01 #2020-11-01 #2020-12-01 #2021-01-01)
(stream->list (stream-take 12 (month-stream #2020-02-01))))
(test-assert "in-date-range?"
(not ((in-date-range? #2020-01-01 #2020-02-29)
#2018-02-02)))
(test-assert "A"
(timespan-overlaps? #2020-01-01 #2020-01-10
#2020-01-05 #2020-01-15))
(test-assert "A, shared start"
(timespan-overlaps? #2020-01-01 #2020-01-10
#2020-01-01 #2020-01-15))
(test-assert "A, tangential"
(not (timespan-overlaps? #2020-01-01T00:00:00 #2020-01-10T00:00:00
#2020-01-10T00:00:00 #2020-01-30T00:00:00)))
(test-assert "s1 instant"
(timespan-overlaps? #2020-01-15T10:00:00 #2020-01-15T10:00:00
#2020-01-10T00:00:00 #2020-01-30T00:00:00))
(test-assert "s2 instant"
(timespan-overlaps? #2020-01-10T00:00:00 #2020-01-30T00:00:00
#2020-01-15T10:00:00 #2020-01-15T10:00:00))
(test-assert "s1 instant, shared start with s2"
(timespan-overlaps? #2020-01-15T10:00:00 #2020-01-15T10:00:00
#2020-01-15T10:00:00 #2020-01-30T00:00:00))
(test-assert "s1 instant, shared end with s2"
(not (timespan-overlaps? #2020-01-15T10:00:00 #2020-01-15T10:00:00
#2020-01-10T00:00:00 #2020-01-15T10:00:00)))
(test-assert "s2 instant, shared start with s1"
(timespan-overlaps? #2020-01-15T10:00:00 #2020-01-30T00:00:00
#2020-01-15T10:00:00 #2020-01-15T10:00:00))
(test-assert "s2 instant, shared end with s1"
(not (timespan-overlaps? #2020-01-10T00:00:00 #2020-01-15T10:00:00
#2020-01-15T10:00:00 #2020-01-15T10:00:00)))
(test-assert "both instant"
(not (timespan-overlaps? #2020-01-15T10:00:00 #2020-01-15T10:00:00
#2020-01-15T10:00:00 #2020-01-15T10:00:00)))
(test-assert "tangential whole day"
(not (timespan-overlaps? #2020-01-01 #2020-01-02
#2020-01-02 #2020-01-03)))
(test-assert "B"
(timespan-overlaps? #2020-01-05 #2020-01-15
#2020-01-01 #2020-01-10))
(test-assert "E"
(timespan-overlaps? #2020-01-01 #2020-01-10
#2020-01-01 #2020-01-10))
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