87 lines
2.2 KiB
Plaintext
87 lines
2.2 KiB
Plaintext
# 2024-08-19
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# https://sqlite.org/forum/forumpost/eaa0a09786c6368b
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#
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# Apparently SQLite has been miscomputing leap-year dates before
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# the year 0400.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Skip this whole file if date and time functions are omitted
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# at compile-time
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#
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ifcapable {!datetime} {
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finish_test
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return
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}
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# Data sources:
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# 1-10 https://ssd.jpl.nasa.gov/tools/jdc/#/cd
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# 11 Jean Meeus, Astronomical Algorithms, ISBN 0-943396-61-1, p.59
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# 12 https://en.wikipedia.org/wiki/Julian_day
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#
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# ID YEAR MONTH DAY JD
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set date5data {
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1 2024 2 29 2460369.5
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2 2024 3 1 2460370.5
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3 2023 2 28 2460003.5
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4 2023 3 1 2460004.5
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5 2000 2 29 2451603.5
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6 2000 3 1 2451604.5
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7 1900 2 28 2415078.5
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8 1900 3 1 2415079.5
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9 1712 2 29 2346413.5
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10 1712 3 1 2346414.5
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11 1977 4 26 2443259.5
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12 2013 1 1 2456293.5
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}
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foreach {id y m d jd} $date5data {
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set date [format %04d-%02d-%02d $y $m $d]
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do_execsql_test date5-jd$jd {
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SELECT date($::jd);
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} $date
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do_execsql_test date5-cal/$date {
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SELECT julianday($::date);
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} $jd
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for {set i 1} {$y+400*$i<=9999} {incr i} {
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set y2 [expr {$y+400*$i}]
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set date2 [format %04d-%02d-%02d $y2 $m $d]
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set jd2 [expr {$jd+146097*$i}]
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do_execsql_test date5-jd$jd2 {
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SELECT date($::jd2);
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} $date2
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do_execsql_test date5-cal/$date2 {
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SELECT julianday($::date2);
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} $jd2
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}
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for {set i 1} {$y-400*$i>=-4712} {incr i} {
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set y2 [expr {$y-400*$i}]
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if {$y2<0} {
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set date2 [format -%04d-%02d-%02d [expr {-$y2}] $m $d]
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} else {
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set date2 [format %04d-%02d-%02d $y2 $m $d]
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}
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set jd2 [expr {$jd-146097*$i}]
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do_execsql_test date5-jd$jd2 {
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SELECT date($::jd2);
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} $date2
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do_execsql_test date5-cal/$date2 {
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SELECT julianday($::date2);
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} $jd2
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}
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}
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finish_test
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