qt5base-lts/tests/auto/gui/kernel/qevent/tst_qevent.cpp
Marc Mutz de10bf4955 QEvent: document and check when registerEventTypes() returns -1
In tst_QEvent, add a check that exhausts the available event type ids and verifies
that registerEventTypes() returns -1 in that case, as documented.

I haven't found a way to test the other case in which -1 is returned.

Since this test operates on a global write-only registry the new test case needs
to keep track of whether the earlier test cases have run successfully. If they
didn't, skip this test case.

Change-Id: I68ea9d17d10dcec22175994aba269dd09c9adf43
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2014-03-29 12:40:05 +01:00

118 lines
4.1 KiB
C++

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#include <QtTest/QtTest>
#include <QtCore/qcoreapplication.h>
#include <QtCore/qcoreevent.h>
class tst_QEvent : public QObject
{
Q_OBJECT
public:
tst_QEvent();
~tst_QEvent();
private slots:
void registerEventType_data();
void registerEventType();
void exhaustEventTypeRegistration(); // keep behind registerEventType() test
private:
bool registerEventTypeSucceeded; // track success of registerEventType for use by exhaustEventTypeRegistration()
};
tst_QEvent::tst_QEvent()
: registerEventTypeSucceeded(true)
{ }
tst_QEvent::~tst_QEvent()
{ }
void tst_QEvent::registerEventType_data()
{
QTest::addColumn<int>("hint");
QTest::addColumn<int>("expected");
// default argument
QTest::newRow("default") << -1 << int(QEvent::MaxUser);
// hint not valid
QTest::newRow("User-1") << int(QEvent::User - 1) << int(QEvent::MaxUser - 1);
// hint not valid II
QTest::newRow("MaxUser+1") << int(QEvent::MaxUser + 1) << int(QEvent::MaxUser - 2);
// hint valid, but already taken
QTest::newRow("MaxUser-1") << int(QEvent::MaxUser - 1) << int(QEvent::MaxUser - 3);
// hint valid, but not taken
QTest::newRow("User + 1000") << int(QEvent::User + 1000) << int(QEvent::User + 1000);
}
void tst_QEvent::registerEventType()
{
const bool oldRegisterEventTypeSucceeded = registerEventTypeSucceeded;
registerEventTypeSucceeded = false;
QFETCH(int, hint);
QFETCH(int, expected);
QCOMPARE(QEvent::registerEventType(hint), expected);
registerEventTypeSucceeded = oldRegisterEventTypeSucceeded;
}
void tst_QEvent::exhaustEventTypeRegistration()
{
if (!registerEventTypeSucceeded)
QSKIP("requires the previous test (registerEventType) to have finished successfully");
int i = QEvent::User;
int result;
while ((result = QEvent::registerEventType(i)) == i)
++i;
QCOMPARE(i, int(QEvent::User + 1000));
QCOMPARE(result, int(QEvent::MaxUser - 4));
i = QEvent::User + 1001;
while ((result = QEvent::registerEventType(i)) == i)
++i;
QCOMPARE(result, -1);
QCOMPARE(i, int(QEvent::MaxUser - 4));
}
QTEST_MAIN(tst_QEvent)
#include "tst_qevent.moc"