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(((datetime)
parse-ics-datetime
datetime date time
datetime->unix-time
unix-time->datetime
get-datetime)
((util) let-env))
;; London alternates between +0000 and +0100
(let-env ((TZ "Europe/London"))
(test-equal "London winter"
#2020-01-12T13:30:00
(get-datetime (parse-ics-datetime "20200112T133000Z")))
(test-equal "London summer"
#2020-06-12T14:30:00
(get-datetime (parse-ics-datetime "20200612T133000Z"))))
;; Stockholm alternates between +0100 and +0200
(let-env ((TZ "Europe/Stockholm"))
(test-equal "Stockholm winter"
#2020-01-12T14:30:00
(get-datetime (parse-ics-datetime "20200112T133000Z")))
(test-equal "Stockholm summer"
#2020-06-12T15:30:00
(get-datetime (parse-ics-datetime "20200612T133000Z"))) )
(test-equal
-10800
(datetime->unix-time
(parse-ics-datetime "19700101T000000" "Europe/Tallinn")))
(test-equal
-3600
(datetime->unix-time
(parse-ics-datetime "19700101T000000" "Europe/Stockholm")))
(test-equal
0
(datetime->unix-time (parse-ics-datetime "19700101T000000Z")))
;; yes, really
(test-equal
-3600
(datetime->unix-time
(parse-ics-datetime "19700101T000000" "Europe/London")))
(test-equal
#1970-01-01T00:00:00Z
(unix-time->datetime 0))
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