amass/qtpromise
1
0
Fork 0
mirror of https://github.com/simonbrunel/qtpromise.git synced 2025-07-01 06:41:55 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Implement QPromise::delay(msec)

Browse Source 
This method returns a promise that will be fulfilled with the same value as the `input` promise and after at least `msec` milliseconds. If the `input` promise is rejected, the `output` promise is immediately rejected with the same reason.
This commit is contained in:
Simon Brunel
2017-08-24 18:28:44 +02:00
parent c55fa03e7b
commit b47ca0569e
4 changed files with 60 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
tests/auto/qpromise/tst_qpromise.cpp
View File

@ -3,6 +3,7 @@
// Qt
#include <QtTest>
#include <QElapsedTimer>
using namespace QtPromise;
using namespace QtPromisePrivate;
@ -48,6 +49,9 @@ private Q_SLOTS:
void tapDelayedResolved();
void tapDelayedRejected();
void delayFulfilled();
void delayRejected();
}; // class tst_qpromise
QTEST_MAIN(tst_qpromise)
@ -654,3 +658,36 @@ void tst_qpromise::tapDelayedRejected()
QCOMPARE(p.isRejected(), true);
QCOMPARE(values, QVector<int>({2, 3}));
}
void tst_qpromise::delayFulfilled()
{
QElapsedTimer timer;
qint64 elapsed = -1;
timer.start();
auto p = QPromise<int>::resolve(42).delay(1000).finally([&]() {
elapsed = timer.elapsed();
});
QCOMPARE(waitForValue(p, -1), 42);
QCOMPARE(p.isFulfilled(), true);
QVERIFY(elapsed >= 1000 * 0.95); // Qt::CoarseTimer (default) Coarse timers try to
QVERIFY(elapsed <= 1000 * 1.05); // keep accuracy within 5% of the desired interval.
}
void tst_qpromise::delayRejected()
{
QElapsedTimer timer;
qint64 elapsed = -1;
timer.start();
auto p = QPromise<int>::reject(QString("foo")).delay(1000).finally([&]() {
elapsed = timer.elapsed();
});
QCOMPARE(waitForError(p, QString()), QString("foo"));
QCOMPARE(p.isRejected(), true);
QVERIFY(elapsed < 5);
}