1 files changed, 147 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/time/qtimezone/tst_bench_qtimezone.cpp b/tests/benchmarks/corelib/time/qtimezone/tst_bench_qtimezone.cpp
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+++ b/tests/benchmarks/corelib/time/qtimezone/tst_bench_qtimezone.cpp
@@ -0,0 +1,147 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// Copyright (C) 2019 Crimson AS <info@crimson.no>
+// Copyright (C) 2018 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QTimeZone>
+#include <QTest>
+#include <qdebug.h>
+
+// Enable to test *every* zone, rather than a hand-picked few, in some _data() sets:
+// #define EXHAUSTIVE
+
+class tst_QTimeZone : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+#if QT_CONFIG(timezone)
+    void isTimeZoneIdAvailable();
+    void systemTimeZone();
+    void zoneByName_data();
+    void zoneByName();
+    void transitionList_data();
+    void transitionList();
+    void transitionsForward_data() { transitionList_data(); }
+    void transitionsForward();
+    void transitionsReverse_data() { transitionList_data(); }
+    void transitionsReverse();
+#endif
+};
+
+static QList<QByteArray> enoughZones()
+{
+#ifdef EXHAUSTIVE
+    QList<QByteArray> result = QTimeZone::availableTimeZoneIds();
+#else
+    QList<QByteArray> result {
+        QByteArray("UTC"),
+        // Those named overtly in tst_QDateTime - special cases first:
+        QByteArray("UTC-02:00"), QByteArray("UTC+02:00"), QByteArray("UTC+12:00"),
+        QByteArray("Etc/GMT+3"), QByteArray("GMT-2"), QByteArray("GMT"),
+        // ... then ordinary names in alphabetic order:
+        QByteArray("America/New_York"), QByteArray("America/Sao_Paulo"),
+        QByteArray("America/Vancouver"),
+        QByteArray("Asia/Kathmandu"), QByteArray("Asia/Singapore"),
+        QByteArray("Australia/Brisbane"), QByteArray("Australia/Eucla"),
+        QByteArray("Australia/Sydney"),
+        QByteArray("Europe/Berlin"), QByteArray("Europe/Helsinki"),
+        QByteArray("Europe/Rome"), QByteArray("Europe/Oslo"),
+        QByteArray("Pacific/Apia"), QByteArray("Pacific/Auckland"),
+        QByteArray("Pacific/Kiritimati")
+    };
+#endif
+    result << QByteArray("Vulcan/ShiKahr"); // invalid: also worth testing
+    return result;
+}
+#if QT_CONFIG(timezone)
+void tst_QTimeZone::isTimeZoneIdAvailable()
+{
+    const QList<QByteArray> available = QTimeZone::availableTimeZoneIds();
+    QBENCHMARK {
+        for (const QByteArray &id : available)
+            QVERIFY(QTimeZone::isTimeZoneIdAvailable(id));
+    }
+}
+
+void tst_QTimeZone::systemTimeZone()
+{
+    QBENCHMARK {
+        QTimeZone::systemTimeZone();
+    }
+}
+void tst_QTimeZone::zoneByName_data()
+{
+    QTest::addColumn<QByteArray>("name");
+
+    const auto names = enoughZones();
+    for (const auto &name : names)
+        QTest::newRow(name.constData()) << name;
+}
+
+void tst_QTimeZone::zoneByName()
+{
+    QFETCH(QByteArray, name);
+    QTimeZone zone;
+    QBENCHMARK {
+        zone = QTimeZone(name);
+    }
+    Q_UNUSED(zone);
+}
+
+void tst_QTimeZone::transitionList_data()
+{
+    QTest::addColumn<QByteArray>("name");
+    QTest::newRow("system") << QByteArray(); // Handled specially in the test.
+
+    const auto names = enoughZones();
+    for (const auto &name : names) {
+        QTimeZone zone(name);
+        if (zone.isValid() && zone.hasTransitions())
+            QTest::newRow(name.constData()) << name;
+    }
+}
+
+void tst_QTimeZone::transitionList()
+{
+    QFETCH(QByteArray, name);
+    const QTimeZone zone = name.isEmpty() ? QTimeZone::systemTimeZone() : QTimeZone(name);
+    const QDateTime early = QDate(1625, 6, 8).startOfDay(QTimeZone::UTC); // Cassini's birth date
+    const QDateTime late // End of 32-bit signed time_t
+        = QDateTime::fromSecsSinceEpoch(std::numeric_limits<qint32>::max(), QTimeZone::UTC);
+    QTimeZone::OffsetDataList seq;
+    QBENCHMARK {
+        seq = zone.transitions(early, late);
+    }
+    Q_UNUSED(seq);
+}
+
+void tst_QTimeZone::transitionsForward()
+{
+    QFETCH(QByteArray, name);
+    const QTimeZone zone = name.isEmpty() ? QTimeZone::systemTimeZone() : QTimeZone(name);
+    const QDateTime early = QDate(1625, 6, 8).startOfDay(QTimeZone::UTC); // Cassini's birth date
+    QBENCHMARK {
+        QTimeZone::OffsetData tran = zone.nextTransition(early);
+        while (tran.atUtc.isValid())
+            tran = zone.nextTransition(tran.atUtc);
+    }
+}
+
+void tst_QTimeZone::transitionsReverse()
+{
+    QFETCH(QByteArray, name);
+    const QTimeZone zone = name.isEmpty() ? QTimeZone::systemTimeZone() : QTimeZone(name);
+    const QDateTime late // End of 32-bit signed time_t
+        = QDateTime::fromSecsSinceEpoch(std::numeric_limits<qint32>::max(), QTimeZone::UTC);
+    QBENCHMARK {
+        QTimeZone::OffsetData tran = zone.previousTransition(late);
+        while (tran.atUtc.isValid())
+            tran = zone.previousTransition(tran.atUtc);
+    }
+}
+#endif
+
+QTEST_MAIN(tst_QTimeZone)
+
+#include "tst_bench_qtimezone.moc"