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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QObject>
#include <QTest>
#include <QCache>
#include <QContiguousCache>
#include <QDebug>
#include <stdio.h>
class tst_QContiguousCache : public QObject
{
Q_OBJECT
public:
tst_QContiguousCache() {}
virtual ~tst_QContiguousCache() {}
private slots:
void asScrollingList();
void cacheBenchmark();
void contiguousCacheBenchmark();
};
QTEST_MAIN(tst_QContiguousCache)
void tst_QContiguousCache::asScrollingList()
{
int i;
QContiguousCache<int> c(10);
// Once allocated QContiguousCache should not
// allocate any additional memory for non
// complex data types.
QBENCHMARK {
// simulate scrolling in a list of items;
for (i = 0; i < 10; ++i) {
QCOMPARE(c.available(), 10-i);
c.append(i);
}
QCOMPARE(c.firstIndex(), 0);
QCOMPARE(c.lastIndex(), 9);
QCOMPARE(c.first(), 0);
QCOMPARE(c.last(), 9);
QVERIFY(!c.containsIndex(-1));
QVERIFY(!c.containsIndex(10));
QCOMPARE(c.available(), 0);
for (i = 0; i < 10; ++i) {
QVERIFY(c.containsIndex(i));
QCOMPARE(c.at(i), i);
QCOMPARE(c[i], i);
QCOMPARE(((const QContiguousCache<int>)c)[i], i);
}
for (i = 10; i < 30; ++i)
c.append(i);
QCOMPARE(c.firstIndex(), 20);
QCOMPARE(c.lastIndex(), 29);
QCOMPARE(c.first(), 20);
QCOMPARE(c.last(), 29);
QVERIFY(!c.containsIndex(19));
QVERIFY(!c.containsIndex(30));
QCOMPARE(c.available(), 0);
for (i = 20; i < 30; ++i) {
QVERIFY(c.containsIndex(i));
QCOMPARE(c.at(i), i);
QCOMPARE(c[i], i);
QCOMPARE(((const QContiguousCache<int> )c)[i], i);
}
for (i = 19; i >= 10; --i)
c.prepend(i);
QCOMPARE(c.firstIndex(), 10);
QCOMPARE(c.lastIndex(), 19);
QCOMPARE(c.first(), 10);
QCOMPARE(c.last(), 19);
QVERIFY(!c.containsIndex(9));
QVERIFY(!c.containsIndex(20));
QCOMPARE(c.available(), 0);
for (i = 10; i < 20; ++i) {
QVERIFY(c.containsIndex(i));
QCOMPARE(c.at(i), i);
QCOMPARE(c[i], i);
QCOMPARE(((const QContiguousCache<int> )c)[i], i);
}
for (i = 200; i < 220; ++i)
c.insert(i, i);
QCOMPARE(c.firstIndex(), 210);
QCOMPARE(c.lastIndex(), 219);
QCOMPARE(c.first(), 210);
QCOMPARE(c.last(), 219);
QVERIFY(!c.containsIndex(209));
QVERIFY(!c.containsIndex(300));
QCOMPARE(c.available(), 0);
for (i = 210; i < 220; ++i) {
QVERIFY(c.containsIndex(i));
QCOMPARE(c.at(i), i);
QCOMPARE(c[i], i);
QCOMPARE(((const QContiguousCache<int> )c)[i], i);
}
c.clear(); // needed to reset benchmark
}
// from a specific bug that was encountered. 100 to 299 cached, attempted to cache 250 - 205 via insert, failed.
// bug was that item at 150 would instead be item that should have been inserted at 250
c.setCapacity(200);
for (i = 100; i < 300; ++i)
c.insert(i, i);
for (i = 250; i <= 306; ++i)
c.insert(i, 1000+i);
for (i = 107; i <= 306; ++i) {
QVERIFY(c.containsIndex(i));
QCOMPARE(c.at(i), i < 250 ? i : 1000+i);
}
}
/*
Benchmarks must be near identical in tasks to be fair.
QCache uses pointers to ints as its a requirement of QCache,
whereas QContiguousCache doesn't support pointers (won't free them).
Given the ability to use simple data types is a benefit, its
fair. Although this obviously must take into account we are
testing QContiguousCache use cases here, QCache has its own
areas where it is the more sensible class to use.
*/
void tst_QContiguousCache::cacheBenchmark()
{
QBENCHMARK {
QCache<int, int> cache;
cache.setMaxCost(100);
for (int i = 0; i < 1000; i++)
cache.insert(i, new int(i));
}
}
void tst_QContiguousCache::contiguousCacheBenchmark()
{
QBENCHMARK {
QContiguousCache<int> contiguousCache(100);
for (int i = 0; i < 1000; i++)
contiguousCache.insert(i, i);
}
}
#include "main.moc"
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