| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QTESTEVENTLOOP_H |
| 5 | #define QTESTEVENTLOOP_H |
| 6 | |
| 7 | #include <QtTest/qttestglobal.h> |
| 8 | #include <QtTest/qtestcase.h> |
| 9 | |
| 10 | #include <QtCore/qcoreapplication.h> |
| 11 | #include <QtCore/qeventloop.h> |
| 12 | #include <QtCore/qobject.h> |
| 13 | #include <QtCore/qpointer.h> |
| 14 | #include <QtCore/qthread.h> |
| 15 | |
| 16 | QT_BEGIN_NAMESPACE |
| 17 | |
| 18 | |
| 19 | class Q_TESTLIB_EXPORT QTestEventLoop : public QObject |
| 20 | { |
| 21 | Q_OBJECT |
| 22 | |
| 23 | public: |
| 24 | QTestEventLoop(QObject *parent = nullptr) |
| 25 | : QObject(parent), _timeout(false) |
| 26 | {} |
| 27 | |
| 28 | void enterLoopMSecs(int ms) { enterLoop(msecs: std::chrono::milliseconds{ms}); }; |
| 29 | void enterLoop(int secs) { enterLoop(msecs: std::chrono::seconds{secs}); } |
| 30 | inline void enterLoop(std::chrono::milliseconds msecs); |
| 31 | |
| 32 | inline void changeInterval(int secs) |
| 33 | { killTimer(id: timerId); timerId = startTimer(interval: secs * 1000); } |
| 34 | |
| 35 | inline bool timeout() const |
| 36 | { return _timeout; } |
| 37 | |
| 38 | inline static QTestEventLoop &instance() |
| 39 | { |
| 40 | Q_CONSTINIT static QPointer<QTestEventLoop> testLoop; |
| 41 | if (testLoop.isNull()) |
| 42 | testLoop = new QTestEventLoop(QCoreApplication::instance()); |
| 43 | return *static_cast<QTestEventLoop *>(testLoop); |
| 44 | } |
| 45 | |
| 46 | public Q_SLOTS: |
| 47 | inline void exitLoop(); |
| 48 | |
| 49 | protected: |
| 50 | inline void timerEvent(QTimerEvent *e) override; |
| 51 | |
| 52 | private: |
| 53 | QEventLoop *loop = nullptr; |
| 54 | int timerId = -1; |
| 55 | uint _timeout :1; |
| 56 | Q_DECL_UNUSED_MEMBER uint reserved :31; |
| 57 | }; |
| 58 | |
| 59 | inline void QTestEventLoop::enterLoop(std::chrono::milliseconds msecs) |
| 60 | { |
| 61 | Q_ASSERT(!loop); |
| 62 | _timeout = false; |
| 63 | |
| 64 | if (QTest::runningTest() && QTest::currentTestResolved()) |
| 65 | return; |
| 66 | |
| 67 | using namespace std::chrono_literals; |
| 68 | QEventLoop l; |
| 69 | // if tests want to measure sub-second precision, use a precise timer |
| 70 | timerId = startTimer(time: msecs, timerType: msecs < 1s ? Qt::PreciseTimer : Qt::CoarseTimer); |
| 71 | |
| 72 | loop = &l; |
| 73 | l.exec(); |
| 74 | loop = nullptr; |
| 75 | } |
| 76 | |
| 77 | inline void QTestEventLoop::exitLoop() |
| 78 | { |
| 79 | if (thread() != QThread::currentThread()) |
| 80 | { |
| 81 | QMetaObject::invokeMethod(obj: this, member: "exitLoop", c: Qt::QueuedConnection); |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | if (timerId != -1) |
| 86 | killTimer(id: timerId); |
| 87 | timerId = -1; |
| 88 | |
| 89 | if (loop) |
| 90 | loop->exit(); |
| 91 | } |
| 92 | |
| 93 | inline void QTestEventLoop::timerEvent(QTimerEvent *e) |
| 94 | { |
| 95 | if (e->timerId() != timerId) |
| 96 | return; |
| 97 | _timeout = true; |
| 98 | exitLoop(); |
| 99 | } |
| 100 | |
| 101 | QT_END_NAMESPACE |
| 102 | |
| 103 | #endif |
| 104 |