tst_QHash: Factor qHash()-related test cases into a separate test

This is in preparation of adding more qHash()-related tests.

Change-Id: Iae65bf8b123e1d6ac6d1eb34d74ba4eb9df8173c
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

3 files changed, 159 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qhashfunctions/.gitignore b/tests/auto/corelib/tools/qhashfunctions/.gitignore
new file mode 100644
index 0000000000..ca8886e200
--- /dev/null
+++ b/tests/auto/corelib/tools/qhashfunctions/.gitignore
@@ -0,0 +1 @@
+tst_qhashfunctions
diff --git a/tests/auto/corelib/tools/qhashfunctions/qhashfunctions.pro b/tests/auto/corelib/tools/qhashfunctions/qhashfunctions.pro
new file mode 100644
index 0000000000..21426a4f55
--- /dev/null
+++ b/tests/auto/corelib/tools/qhashfunctions/qhashfunctions.pro
@@ -0,0 +1,5 @@
+CONFIG += testcase parallel_test
+TARGET = tst_qhashfunctions
+QT = core testlib
+SOURCES = $$PWD/tst_qhashfunctions.cpp
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0
diff --git a/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp b/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp
new file mode 100644
index 0000000000..fb038dd37a
--- /dev/null
+++ b/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+
+#include <qhash.h>
+
+class tst_QHashFunctions : public QObject
+{
+    Q_OBJECT
+private Q_SLOTS:
+    void qhash();
+    void fp_qhash_of_zero_is_zero();
+    void qthash_data();
+    void qthash();
+};
+
+void tst_QHashFunctions::qhash()
+{
+    {
+        QBitArray a1;
+        QBitArray a2;
+        QVERIFY(qHash(a1) == 0);
+
+        a1.resize(1);
+        a1.setBit(0, true);
+
+        a2.resize(1);
+        a2.setBit(0, false);
+
+        uint h1 = qHash(a1);
+        uint h2 = qHash(a2);
+
+        QVERIFY(h1 != h2);
+
+        a2.setBit(0, true);
+        QVERIFY(h1 == qHash(a2));
+
+        a1.fill(true, 8);
+        a1.resize(7);
+
+        h1 = qHash(a1);
+
+        a2.fill(true, 7);
+        h2 = qHash(a2);
+
+        QVERIFY(h1 == h2);
+
+        a2.setBit(0, false);
+        uint h3 = qHash(a2);
+        QVERIFY(h2 != h3);
+
+        a2.setBit(0, true);
+        QVERIFY(h2 == qHash(a2));
+
+        a2.setBit(6, false);
+        uint h4 = qHash(a2);
+        QVERIFY(h2 != h4);
+
+        a2.setBit(6, true);
+        QVERIFY(h2 == qHash(a2));
+
+        QVERIFY(h3 != h4);
+    }
+
+    {
+        QPair<int, int> p12(1, 2);
+        QPair<int, int> p21(2, 1);
+
+        QVERIFY(qHash(p12) == qHash(p12));
+        QVERIFY(qHash(p21) == qHash(p21));
+        QVERIFY(qHash(p12) != qHash(p21));
+
+        QPair<int, int> pA(0x12345678, 0x12345678);
+        QPair<int, int> pB(0x12345675, 0x12345675);
+
+        QVERIFY(qHash(pA) != qHash(pB));
+    }
+}
+
+void tst_QHashFunctions::fp_qhash_of_zero_is_zero()
+{
+    QCOMPARE(qHash(-0.0f), 0U);
+    QCOMPARE(qHash( 0.0f), 0U);
+
+    QCOMPARE(qHash(-0.0 ), 0U);
+    QCOMPARE(qHash( 0.0 ), 0U);
+
+#ifndef Q_OS_DARWIN
+    QCOMPARE(qHash(-0.0L), 0U);
+    QCOMPARE(qHash( 0.0L), 0U);
+#endif
+}
+
+void tst_QHashFunctions::qthash_data()
+{
+    QTest::addColumn<QString>("key");
+    QTest::addColumn<uint>("hash");
+
+    QTest::newRow("null") << QString() << 0u;
+    QTest::newRow("empty") << QStringLiteral("") << 0u;
+    QTest::newRow("abcdef") << QStringLiteral("abcdef") << 108567222u;
+    QTest::newRow("tqbfjotld") << QStringLiteral("The quick brown fox jumps over the lazy dog") << 140865879u;
+    QTest::newRow("42") << QStringLiteral("42") << 882u;
+}
+
+void tst_QHashFunctions::qthash()
+{
+    QFETCH(QString, key);
+    const uint result = qt_hash(key);
+    QTEST(result, "hash");
+}
+
+QTEST_APPLESS_MAIN(tst_QHashFunctions)
+#include "tst_qhashfunctions.moc"