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author | Alexandru Croitor <alexandru.croitor@qt.io> | 2019-05-28 16:41:49 +0200 |
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committer | Alexandru Croitor <alexandru.croitor@qt.io> | 2019-06-03 15:14:42 +0200 |
commit | e4079eca49adce16e31dac2a18d49d7a55817891 (patch) | |
tree | 1dfb960ec1115b1f552afe8a013058542389505e /tests/auto/corelib/kernel/qdeadlinetimer | |
parent | f32a6cfb6b6236533508901f114ab57396da8ff3 (diff) | |
parent | ec6dc5f78453048c4f0604655a34c6c20c79d819 (diff) |
Merge remote-tracking branch 'origin/dev' into wip/cmake
Take 5.
Change-Id: Ifb2d20e95ba824e45e667fba6c2ba45389991cc3
Diffstat (limited to 'tests/auto/corelib/kernel/qdeadlinetimer')
-rw-r--r-- | tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp b/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp index 6ab24d2480..4ca68550b9 100644 --- a/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp +++ b/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp @@ -29,6 +29,7 @@ #include <QtCore/QString> #include <QtCore/QTime> #include <QtCore/QDeadlineTimer> +#include <QtCore/QElapsedTimer> #include <QtTest/QtTest> #if QT_HAS_INCLUDE(<chrono>) @@ -50,6 +51,7 @@ private Q_SLOTS: void current(); void deadlines(); void setDeadline(); + void overflow(); void expire(); void stdchrono(); }; @@ -417,6 +419,83 @@ void tst_QDeadlineTimer::setDeadline() QCOMPARE(deadline.deadlineNSecs(), nsec); } +void tst_QDeadlineTimer::overflow() +{ + QFETCH_GLOBAL(Qt::TimerType, timerType); + // Check the constructor for overflows (should also cover saturating the result of the deadline() method if overflowing) + QDeadlineTimer now = QDeadlineTimer::current(timerType), deadline(std::numeric_limits<qint64>::max() - 1, timerType); + QVERIFY(deadline.isForever() || deadline.deadline() >= now.deadline()); + + // Check the setDeadline with milliseconds (should also cover implicitly setting the nanoseconds as qint64 max) + deadline.setDeadline(std::numeric_limits<qint64>::max() - 1, timerType); + QVERIFY(deadline.isForever() || deadline.deadline() >= now.deadline()); + + // Check the setRemainingTime with milliseconds (should also cover implicitly setting the nanoseconds as qint64 max) + deadline.setRemainingTime(std::numeric_limits<qint64>::max() - 1, timerType); + QVERIFY(deadline.isForever() || deadline.deadline() >= now.deadline()); + + // Check that the deadline gets saturated when the arguments of setPreciseDeadline are large + deadline.setPreciseDeadline(std::numeric_limits<qint64>::max() - 1, std::numeric_limits<qint64>::max() - 1, timerType); + QCOMPARE(deadline.deadline(), std::numeric_limits<qint64>::max()); + QVERIFY(deadline.isForever()); + + // Check that remainingTime gets saturated if we overflow + deadline.setPreciseRemainingTime(std::numeric_limits<qint64>::max() - 1, std::numeric_limits<qint64>::max() - 1, timerType); + QCOMPARE(deadline.remainingTime(), qint64(-1)); + QVERIFY(deadline.isForever()); + + // Check that we saturate the getter for nanoseconds + deadline.setPreciseDeadline(std::numeric_limits<qint64>::max() - 1, 0, timerType); + QCOMPARE(deadline.deadlineNSecs(), std::numeric_limits<qint64>::max()); + + // Check that adding nanoseconds and overflowing is consistent and saturates the timer + deadline = QDeadlineTimer::addNSecs(deadline, std::numeric_limits<qint64>::max() - 1); + QVERIFY(deadline.isForever()); + + // Make sure forever is forever, regardless of us subtracting time from it + deadline = QDeadlineTimer(QDeadlineTimer::Forever, timerType); + deadline = QDeadlineTimer::addNSecs(deadline, -10000); + QVERIFY(deadline.isForever()); + + // Make sure we get the correct result when moving the deadline back and forth in time + QDeadlineTimer current = QDeadlineTimer::current(timerType); + QDeadlineTimer takenNSecs = QDeadlineTimer::addNSecs(current, -1000); + QVERIFY(takenNSecs.deadlineNSecs() - current.deadlineNSecs() == -1000); + QDeadlineTimer addedNSecs = QDeadlineTimer::addNSecs(current, 1000); + QVERIFY(addedNSecs.deadlineNSecs() - current.deadlineNSecs() == 1000); + + // Make sure the calculation goes as expected when we need to subtract nanoseconds + // We make use of an additional timer to be certain that + // even when the environment is under load we can track the + // time needed to do the calls + static constexpr qint64 nsExpected = 1000 * 1000 * 1000 - 1000; // 1s - 1000ns, what we pass to setPreciseRemainingTime() later + + QElapsedTimer callTimer; + callTimer.start(); + + deadline = QDeadlineTimer::current(timerType); + qint64 nsDeadline = deadline.deadlineNSecs(); + // We adjust in relation to current() here, so we expect the difference to be a tad over the exact number. + // However we are tracking the elapsed time, so it shouldn't be a problem. + deadline.setPreciseRemainingTime(1, -1000, timerType); + qint64 difference = (deadline.deadlineNSecs() - nsDeadline) - nsExpected; + QVERIFY(difference >= 0); // Should always be true, but just in case + QVERIFY(difference <= callTimer.nsecsElapsed()); // Ideally difference should be 0 exactly + + // Make sure setRemainingTime underflows gracefully + deadline.setPreciseRemainingTime(std::numeric_limits<qint64>::min() / 10, 0, timerType); + QVERIFY(!deadline.isForever()); // On Win/macOS the above underflows, make sure we don't saturate to Forever + QVERIFY(deadline.remainingTime() == 0); + // If the timer is saturated we don't want to get a valid number of milliseconds + QVERIFY(deadline.deadline() == std::numeric_limits<qint64>::min()); + + // Check that the conversion to milliseconds and nanoseconds underflows gracefully + deadline.setPreciseDeadline(std::numeric_limits<qint64>::min() / 10, 0, timerType); + QVERIFY(!deadline.isForever()); // On Win/macOS the above underflows, make sure we don't saturate to Forever + QVERIFY(deadline.deadline() == std::numeric_limits<qint64>::min()); + QVERIFY(deadline.deadlineNSecs() == std::numeric_limits<qint64>::min()); +} + void tst_QDeadlineTimer::expire() { QFETCH_GLOBAL(Qt::TimerType, timerType); |