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;;; Commentary:
;; Tests that event-clamping (checking how long part of an event
;; overlaps another time span) works.
;;; Code:

(define-module (test vcomponent-datetime)
  :use-module (srfi srfi-64)
  :use-module (srfi srfi-88)
  :use-module ((datetime) :select (date time datetime))
  :use-module ((vcomponent datetime) :select (event-length/clamped))
  :use-module ((vcomponent formats ical parse) :select (parse-calendar)))

(define ev
  (call-with-input-string
    "BEGIN:VEVENT
DTSTART:20200329T170000
DTEND:20200401T100000
END:VEVENT"
    parse-calendar))


;; |-----------------| test interval
;;                 |----------| event interval

(test-equal
  "Correct clamping"
  (datetime time: (time hour: 7)) ; 2020-03-29T17:00 - 2020-03-30T00:00
  (event-length/clamped
    #2020-03-23 ; a time way before the start of the event
    #2020-03-29 ; a time slightly after the end of the event
    ev))

(define utc-ev
  (call-with-input-string
    "BEGIN:VEVENT
DTSTART:20200329T150000Z
DTEND:20200401T080000Z
END:VEVENT"
    parse-calendar))

(test-equal
  "Correct clamping UTC"
  (datetime time: (time hour: 7))
  (event-length/clamped
    #2020-03-23
    #2020-03-29
    ev))