From 453d8797f7c1090d6085a046e1f6e2728e251a9c Mon Sep 17 00:00:00 2001
From: Ivan Solovev <ivan.solovev@qt.io>
Date: Tue, 14 Jan 2025 14:06:49 +0100
Subject: [PATCH] QChronoTimer: add test for interval (u)int overflow

Now when we ported all dispatchers to QAbstractEventDispatcherV2
interface, we can reliably verify that we support timers with > 24 days
intervals. Also add a 50 days test to check for uint overflows.

Adding larger intervals requires test adjustments, because for coarse
timers the actual interval may be up to 5% larger then specified.

Amends 0d0b346322f6b078e6fe60cd3612e8d08a0d5f00.

Task-number: QTBUG-132388
Change-Id: I152cb305c8460801f16bba0c5cd6758c366bce84
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 .../kernel/qchronotimer/tst_qchronotimer.cpp        | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tests/auto/corelib/kernel/qchronotimer/tst_qchronotimer.cpp b/tests/auto/corelib/kernel/qchronotimer/tst_qchronotimer.cpp
index 2fb29a2e874..370d5da91a6 100644
--- a/tests/auto/corelib/kernel/qchronotimer/tst_qchronotimer.cpp
+++ b/tests/auto/corelib/kernel/qchronotimer/tst_qchronotimer.cpp
@@ -252,10 +252,14 @@ void tst_QChronoTimer::remainingTimeInitial_data()
     QTest::addRow("precisetiemr-0ns") << 0ns << Qt::PreciseTimer;
     QTest::addRow("precisetimer-1ms") << nanoseconds{1ms} << Qt::PreciseTimer;
     QTest::addRow("precisetimer-10ms") <<nanoseconds{10ms} << Qt::PreciseTimer;
+    QTest::addRow("precisetimer-25days") << nanoseconds{25 * 24h} << Qt::PreciseTimer;
+    QTest::addRow("precisetimer-50days") << nanoseconds{50 * 24h} << Qt::PreciseTimer;
 
     QTest::addRow("coarsetimer-0ns") << 0ns << Qt::CoarseTimer;
     QTest::addRow("coarsetimer-1ms") << nanoseconds{1ms} << Qt::CoarseTimer;
     QTest::addRow("coarsetimer-10ms") << nanoseconds{10ms} << Qt::CoarseTimer;
+    QTest::addRow("coarsetimer-25days") << nanoseconds{25 * 24h} << Qt::CoarseTimer;
+    QTest::addRow("coarsetimer-50days") << nanoseconds{50 * 24h} << Qt::CoarseTimer;
 }
 
 void tst_QChronoTimer::remainingTimeInitial()
@@ -272,7 +276,14 @@ void tst_QChronoTimer::remainingTimeInitial()
 
     const std::chrono::nanoseconds rt = timer.remainingTime();
     QCOMPARE_GE(rt, 0ns);
-    QCOMPARE_LE(rt, startTimeNs);
+    if (timerType != Qt::PreciseTimer) {
+        // For coarse timers the calculated interval might be up to 5% larger
+        // then specified
+        auto largerStartTime = std::chrono::nanoseconds{startTimeNs + startTimeNs / 20};
+        QCOMPARE_LE(rt, largerStartTime);
+    } else {
+        QCOMPARE_LE(rt, startTimeNs);
+    }
 }
 
 void tst_QChronoTimer::remainingTimeDuringActivation_data()