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QPair: add test for pair of references

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std::pair explicitly supports this (cf. std::tie),
so check we do, too.

Change-Id: Idc3c1739a4bc64a0da120dcf953def7e432f6f71
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Marc Mutz 2016-07-11 11:04:52 +02:00
parent 6a7bae9a26
commit e6a5be1d81
1 changed files with 30 additions and 0 deletions
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30
tests/auto/corelib/tools/qpair/tst_qpair.cpp
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@ -40,6 +40,7 @@ class tst_QPair : public QObject
{
Q_OBJECT
private Q_SLOTS:
void pairOfReferences();
void testConstexpr();
};
@ -94,6 +95,35 @@ Q_STATIC_ASSERT(!QTypeInfo<QPairPP>::isDummy );
Q_STATIC_ASSERT(!QTypeInfo<QPairPP>::isPointer);
void tst_QPair::pairOfReferences()
{
int i = 0;
QString s;
QPair<int&, QString&> p(i, s);
p.first = 1;
QCOMPARE(i, 1);
i = 2;
QCOMPARE(p.first, 2);
p.second = QLatin1String("Hello");
QCOMPARE(s, QLatin1String("Hello"));
s = QLatin1String("olleH");
QCOMPARE(p.second, QLatin1String("olleH"));
QPair<int&, QString&> q = p;
q.first = 3;
QCOMPARE(i, 3);
QCOMPARE(p.first, 3);
q.second = QLatin1String("World");
QCOMPARE(s, QLatin1String("World"));
QCOMPARE(p.second, QLatin1String("World"));
}
void tst_QPair::testConstexpr()
{
Q_CONSTEXPR QPair<int, double> pID = qMakePair(0, 0.0);