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Cope with IANA DB links that aren't in the CLDR alias mapping

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As documented in the LMDL spec (see comment on unAliasedLinks in the
diff) not all links in the IANA DB are represented as CLDR
aliases. This didn't surface until a recent update to the IANA DB used
symlinks more aggressively.

Add a set of known cases of this to exclude from hasAlternativeName()
checks and let's hope it doesn't grow too often.

Pick-to: 6.8
Change-Id: Ia12d9fcad96485469ded6bdb7345a400bd34efae
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Edward Welbourne 2024-12-05 14:31:21 +01:00
parent 9f75fe29d3
commit ae6b6bf363
1 changed files with 27 additions and 4 deletions
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31
tests/auto/corelib/time/qtimezone/tst_qtimezone.cpp
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@ -70,11 +70,32 @@ private Q_SLOTS:
private:
void printTimeZone(const QTimeZone &tz);
#if defined(QT_BUILD_INTERNAL) && QT_CONFIG(timezone)
#if QT_CONFIG(timezone)
# if defined(QT_BUILD_INTERNAL)
// Generic tests of privates, called by implementation-specific private tests:
void testCetPrivate(const QTimeZonePrivate &tzp);
void testEpochTranPrivate(const QTimeZonePrivate &tzp);
#endif // QT_BUILD_INTERNAL && timezone backends
# endif // QT_BUILD_INTERNAL
// Where tzdb contains a link between zones in different territories, CLDR
// doesn't treat those as aliases for one another. For details see "Links in
// the tz database" at:
// https://www.unicode.org/reports/tr35/#time-zone-identifiers
// Some of these could be identified as equivalent by looking at metazone
// histories but, for now, we stick with CLDR's notion of alias.
const std::set<QByteArrayView> unAliasedLinks = {
// By continent:
"America/Kralendijk", "America/Lower_Princes", "America/Marigot", "America/St_Barthelemy",
"Antarctica/South_Pole",
"Arctic/Longyearbyen",
"Asia/Choibalsan",
"Atlantic/Jan_Mayen",
"Europe/Bratislava", "Europe/Busingen", "Europe/Mariehamn",
"Europe/Podgorica", "Europe/San_Marino", "Europe/Vatican",
// Assorted legacy abbreviations and POSIX zones:
"CET", "EET", "EST", "HST", "MET", "MST", "WET",
"CST6CDT", "EST5EDT", "MST7MDT", "PST8PDT",
};
#endif // timezone backends
// Set to true to print debug output, test Display Names and run long stress tests
static constexpr bool debug = false;
};
@ -565,7 +586,8 @@ void tst_QTimeZone::isTimeZoneIdAvailable()
QVERIFY2(QTimeZone::isTimeZoneIdAvailable(id), id);
const QTimeZone zone(id);
QVERIFY2(zone.isValid(), id);
QVERIFY2(zone.hasAlternativeName(id), zone.id() + " != " + id);
if (unAliasedLinks.find(id) == unAliasedLinks.end())
QVERIFY2(zone.hasAlternativeName(id), zone.id() + " != " + id);
}
// availableTimeZoneIds() doesn't list all possible offset IDs, but
// isTimeZoneIdAvailable() should accept them.
@ -998,7 +1020,8 @@ void tst_QTimeZone::stressTest()
for (const QByteArray &id : idList) {
QTimeZone testZone = QTimeZone(id);
QCOMPARE(testZone.isValid(), true);
QVERIFY2(testZone.hasAlternativeName(id), testZone.id() + " != " + id);
if (unAliasedLinks.find(id) == unAliasedLinks.end())
QVERIFY2(testZone.hasAlternativeName(id), testZone.id() + " != " + id);
QDateTime testDate = QDateTime(QDate(2015, 1, 1), QTime(0, 0), UTC);
testZone.territory();
testZone.comment();