diff options
author | Marc Mutz <marc.mutz@kdab.com> | 2014-08-14 11:22:23 +0200 |
---|---|---|
committer | Marc Mutz <marc.mutz@kdab.com> | 2015-01-18 19:36:06 +0100 |
commit | b8e46fce5c70c399c615e1b846076f379db173c5 (patch) | |
tree | d91cca50e2039845328e25c2ddf8188ea122d0f7 /tests/auto/corelib/tools/qset/tst_qset.cpp | |
parent | 70e3935c38c077e35629a6651479a8a9f9e9f528 (diff) |
Add qHash() overload for QSet
...using qHashRangeCommutative(). Also add a test.
[ChangeLog][QtCore][QSet] Can now be used as the key in QSet, QHash.
Change-Id: Ie7c81d257a3b324fc03d394fa7c9fcf0c6fb062a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'tests/auto/corelib/tools/qset/tst_qset.cpp')
-rw-r--r-- | tests/auto/corelib/tools/qset/tst_qset.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qset/tst_qset.cpp b/tests/auto/corelib/tools/qset/tst_qset.cpp index b86ee24ac7..b8e23d3fae 100644 --- a/tests/auto/corelib/tools/qset/tst_qset.cpp +++ b/tests/auto/corelib/tools/qset/tst_qset.cpp @@ -72,6 +72,7 @@ private slots: void javaMutableIterator(); void makeSureTheComfortFunctionsCompile(); void initializerList(); + void qhash(); }; struct IdentityTracker { @@ -968,6 +969,50 @@ void tst_QSet::initializerList() #endif } +QT_BEGIN_NAMESPACE +extern Q_CORE_EXPORT QBasicAtomicInt qt_qhash_seed; // from qhash.cpp +QT_END_NAMESPACE + +void tst_QSet::qhash() +{ + // + // check that sets containing the same elements hash to the same value + // + { + QSet<int> s1; + s1.reserve(4); + s1 << 400 << 300 << 200 << 100; + + // also change the seed: + qt_qhash_seed = qt_qhash_seed + 0x9e3779b9; + + QSet<int> s2; + s2.reserve(100); // provoke different bucket counts + s2 << 100 << 200 << 300 << 400; // and insert elements in different order, too + + QVERIFY(s1.capacity() != s2.capacity()); + QCOMPARE(s1, s2); + QVERIFY(!std::equal(s1.cbegin(), s1.cend(), s2.cbegin())); // verify that the order _is_ different + QCOMPARE(qHash(s1), qHash(s2)); + } + + // + // check that sets of sets work: + // + { +#ifdef Q_COMPILER_INITIALIZER_LISTS + QSet<QSet<int> > intSetSet = { { 0, 1, 2 }, { 0, 1 }, { 1, 2 } }; +#else + QSet<QSet<int> > intSetSet; + QSet<int> intSet01, intSet12; + intSet01 << 0 << 1; + intSet12 << 1 << 2; + intSetSet << intSet01 << intSet12 << (intSet01|intSet12); +#endif + QCOMPARE(intSetSet.size(), 3); + } +} + QTEST_APPLESS_MAIN(tst_QSet) #include "tst_qset.moc" |