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(in-package #:local-time.test)
(defsuite* (timezone :in test))
(eval-when (:compile-toplevel :load-toplevel :execute)
(local-time::define-timezone eastern-tz
(merge-pathnames #p"EST5EDT" local-time::*default-timezone-repository-path*))
(local-time::define-timezone cet-tz
(merge-pathnames #p"Europe/Amsterdam" local-time::*default-timezone-repository-path*))
(local-time::define-timezone utc-leaps
(merge-pathnames #p"right/UTC" local-time::*default-timezone-repository-path*))
(local-time::define-timezone anchorage
(merge-pathnames #p"America/Anchorage" local-time::*default-timezone-repository-path*)
:load t)
(local-time::define-timezone ist
(merge-pathnames #p"Asia/Kolkata" local-time::*default-timezone-repository-path*))
(local-time::define-timezone portugal
(merge-pathnames #p"Portugal" local-time::*default-timezone-repository-path*))
(local-time::define-timezone eet
(merge-pathnames #p"EET" local-time::*default-timezone-repository-path*))
)
(deftest offset/type-anchorage ()
(every (lambda (subzone)
(let ((offset (local-time::subzone-offset subzone)))
(is (typep offset 'local-time::timezone-offset)
"offset ~a not of type timezone-offset"
offset)))
(local-time::timezone-subzones anchorage)))
(deftest transition-position/correct-position ()
(let ((cases '((0 #(1 2 3 4 5) -1)
(1 #(1 2 3 4 5) 0)
(2 #(1 2 3 4 5) 1)
(3 #(1 2 3 4 5) 2)
(4 #(1 2 3 4 5) 3)
(5 #(1 2 3 4 5) 4)
(1 #(1 3 5) 0)
(2 #(1 3 5) 0)
(3 #(1 3 5) 1)
(4 #(1 3 5) 1)
(5 #(1 3 5) 2)
(6 #(1 3 5) 2)
(1 #(1 3 5 7) 0)
(2 #(1 3 5 7) 0)
(3 #(1 3 5 7) 1)
(4 #(1 3 5 7) 1)
(5 #(1 3 5 7) 2)
(6 #(1 3 5 7) 2)
(7 #(1 3 5 7) 3)
(8 #(1 3 5 7) 3)
)))
(dolist (case cases)
(destructuring-bind (needle haystack want)
case
(let ((got (local-time::transition-position needle haystack)))
(is (= got want)
"(transition-position ~a ~a) got ~a, want ~a"
needle haystack got want))))))
(defparameter *dst-test-cases*
`((,eastern-tz
;; Spring forward
((2008 3 9 6 58) (2008 3 9 1 58))
((2008 3 9 6 59) (2008 3 9 1 59))
((2008 3 9 7 0) (2008 3 9 3 0))
((2008 3 9 7 1) (2008 3 9 3 1))
;; Fall back
((2008 11 2 5 59) (2008 11 2 1 59)
;; 01:59 EST is ambiguous on that day, the
;; encoding prefers the later absolute time.
(2008 11 2 6 59))
((2008 11 2 6 0) (2008 11 2 1 0))
((2008 11 2 6 1) (2008 11 2 1 1))
((2008 11 2 6 59) (2008 11 2 1 59)))
(,cet-tz
;; Spring forward
((2023 3 26 0 59) (2023 3 26 1 59))
((2023 3 26 1 0) (2023 3 26 3 0))
((2023 3 26 1 1) (2023 3 26 3 1))))
"A list of expressions (tz test-case*).
Each test-case consists of two or three time expressions:
(T-UTC T-TZ [T-UTC'])
Encoding T-UTC in UTC and decoding the result in TZ should yield T-TZ.
Ecnoding T-TZ in TZ and decoding the result in UTC should yield T-UTC;
except for cases of ambiguous wall times during a DST fall back, where T-UTC'
is expected instead.")
(deftest test/timezone/decode-timestamp-dst ()
;; Testing DST calculation with a known timezone
(dolist (tz-test-cases *dst-test-cases*)
(destructuring-bind (tz . test-cases) tz-test-cases
(dolist (test-case (cdr test-cases))
(is (equal
(reverse
(subseq
(multiple-value-list
(let ((timestamp
(apply 'local-time:encode-timestamp
`(0 0 ,@(reverse (first test-case)) :offset 0))))
(local-time:decode-timestamp timestamp :timezone tz)))
2 7)) ;min, ..., year and reversed year, ..., min
(second test-case)))))))
(deftest test/timezone/decode-universal-dst ()
;; Testing DST calculation with a known timezone
(dolist (tz-test-cases *dst-test-cases*)
(destructuring-bind (tz . test-cases) tz-test-cases
(dolist (test-case (cdr test-cases))
(is (equal
(reverse
(subseq
(multiple-value-list
(let ((universal
(apply #'encode-universal-time
`(0 ,@(reverse (first test-case)) 0))))
(local-time:decode-universal-time-with-tz universal
:timezone tz)))
1 6)) ;min, ..., year and reversed year, ..., min
(second test-case)))))))
(deftest test/timzone/formatting ()
;; Zone Asia/Kolkata has positive fractional hour offset;
;; zone Portugal has a negative fractional hour offset (in 1901).
(is (equal (format-timestring t (encode-timestamp 0 0 0 0 1 1 2000 :offset 0)
:timezone ist)
"2000-01-01T05:30:00.000000+05:30"))
(is (equal (format-timestring t (encode-timestamp 0 0 0 0 5 12 1901 :offset 0)
:timezone portugal)
"1901-12-04T23:23:15.000000-00:37")))
(deftest test/timezone/encode-timestamp-dst ()
;; Testing DST calculation with a known timezone, encoded in the timezone
(dolist (tz-test-cases *dst-test-cases*)
(destructuring-bind (tz . test-cases) tz-test-cases
(dolist (test-case test-cases)
(is (equal
(reverse
(subseq
(multiple-value-list
(let ((timestamp
(apply 'local-time:encode-timestamp
`(0 0 ,@(reverse (second test-case)) :timezone ,tz))))
(local-time:decode-timestamp timestamp :offset 0)))
2 7))
;; Allow for ambiguous local times
(or (third test-case) (first test-case))))))))
(deftest test/timezone/encode-universal-dst ()
;; Testing DST calculation with a known timezone, encoded in the timezone
(dolist (tz-test-cases *dst-test-cases*)
(destructuring-bind (tz . test-cases) tz-test-cases
(dolist (test-case test-cases)
(is (equal
(reverse
(subseq
(multiple-value-list
(let ((universal
(apply 'local-time:encode-universal-time-with-tz
`(0 ,@(reverse (second test-case)) :timezone ,tz))))
(decode-universal-time universal 0)))
1 6))
;; Allow for ambiguous local times
(or (third test-case) (first test-case))))))))
(deftest test/timezone/universal-values ()
;; Minimal consistency for day-of-week daylight-p, offset, abbrevation
(let ((march-utc (encode-universal-time 0 0 0 1 3 2023 0))
(march-decode '(0 0 1 1 3 2023 2 nil -1 "CET"))
(june-utc (encode-universal-time 0 0 0 1 6 2023 0))
(june-decode '(0 0 2 1 6 2023 3 t -2 "CEST")))
(is (equal (multiple-value-list
(local-time:decode-universal-time-with-tz march-utc
:timezone cet-tz))
march-decode))
(is (equal (apply #'local-time:encode-universal-time-with-tz
`(,@(subseq march-decode 0 6) :timezone ,cet-tz))
march-utc))
(is (equal (multiple-value-list
(local-time:decode-universal-time-with-tz june-utc
:timezone cet-tz))
june-decode))
(is (equal (apply #'local-time:encode-universal-time-with-tz
`(,@(subseq june-decode 0 6) :timezone ,cet-tz))
june-utc))))
(deftest test/timezone/strict-validity ()
;; The timezone EET is only defined from 1977-04-03.
(flet ((_eet-to-utc ()
(multiple-value-list
(local-time:decode-timestamp
(local-time:encode-timestamp 0 0 0 0 1 4 1977 :timezone eet)
:offset 0))))
(and (let ((local-time::*strict-first-subzone-validity* nil))
(is (equal (reverse (subseq (_eet-to-utc) 2 7))
'(1977 3 31 21 0))))
(let ((local-time::*strict-first-subzone-validity* t))
(signals simple-error (_eet-to-utc))))))
(deftest test/timezone/adjust-across-dst-by-days ()
(let* ((old (parse-timestring "2014-03-09T01:00:00.000000-05:00"))
(new (timestamp+ old 1 :day eastern-tz)))
(is (= (* 23 60 60) (timestamp-difference new old)))))
(deftest test/timezone/adjust-across-dst-by-hours ()
(let* ((old (parse-timestring "2014-03-09T01:00:00.000000-05:00"))
(new (timestamp+ old 24 :hour eastern-tz)))
(is (= (* 24 60 60) (timestamp-difference new old)))))
(deftest test/timezone/timestamp-minimize-part ()
(is (timestamp=
(timestamp-minimize-part
(encode-timestamp 999999999 59 59 1 14 3 2010 :timezone eastern-tz)
:month
:timezone eastern-tz)
(encode-timestamp 0 0 0 0 1 1 2010 :timezone eastern-tz)))
(is (timestamp=
(timestamp-minimize-part
(encode-timestamp 0 0 0 2 14 3 2010 :timezone eastern-tz)
:month
:timezone eastern-tz)
(encode-timestamp 0 0 0 0 1 1 2010 :timezone eastern-tz))))
(deftest test/timezone/timestamp-maximize-part ()
(is (timestamp=
(timestamp-maximize-part
(encode-timestamp 999999999 59 59 1 7 11 2010 :timezone eastern-tz)
:month
:timezone eastern-tz)
(encode-timestamp 999999999 59 59 23 31 12 2010 :timezone eastern-tz)))
(is (timestamp=
(timestamp-maximize-part
(encode-timestamp 0 0 0 2 7 11 2010 :timezone eastern-tz)
:month
:timezone eastern-tz)
(encode-timestamp 999999999 59 59 23 31 12 2010 :timezone eastern-tz))))
(deftest test/leaps/tai-to-utc ()
(let ((*default-timezone* utc-leaps))
(is (= 1435708799
(local-time::%adjust-sec-for-leap-seconds 1435708824)
(local-time::%adjust-sec-for-leap-seconds 1435708825)))
(is (= 1435708800
(local-time::%adjust-sec-for-leap-seconds 1435708826)))))
(deftest test/abbrev-subzone/not-found ()
(is (null (local-time:all-timezones-matching-subzone "FOO"))))
(deftest test/abbrev-subzone/find-bst ()
(is (member
"Europe/London"
(local-time:timezones-matching-subzone "BST" (unix-to-timestamp 1585906626))
:key (lambda (x) (local-time:zone-name (car x)))
:test #'string=))
;; Some historical timezone
(is (member
"America/Atka"
(local-time:all-timezones-matching-subzone "BST")
:key (lambda (x) (local-time:zone-name (car x)))
:test #'string=)))
(deftest test/abbrev-subzone/find-gmt ()
;; As of 2020-04-03
(is (equal
"Etc/Greenwich"
(local-time:zone-name
(caar (local-time:timezones-matching-subzone "GMT" (unix-to-timestamp 1585906626)))))))
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