summaryrefslogtreecommitdiff
path: root/tests/auto/qrand/tst_qrand.cpp
blob: 68d60cf8382b8f937e6128e7ed709ccb0c660785 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>

class tst_QRand: public QObject
{
    Q_OBJECT
private slots:
    void testqrand();
};

void tst_QRand::testqrand()
{
    const int numTestValues = 100;

    int generatedNumbers[numTestValues];
    bool generatesSameSequence = true;

    // test without calling srand() first
    // should give same sequence as with srand(1)

    for (int i=0; i<numTestValues; ++i)
        generatedNumbers[i] = qrand();

    qsrand(1);
    for (int i=0; i<numTestValues; ++i)
        if (generatedNumbers[i] != qrand())
            generatesSameSequence = false;
    
    QVERIFY(generatesSameSequence);

    for (unsigned int seed=1; seed < 10; seed+=100) {

        qsrand(seed);
        for (int i=0; i<numTestValues; ++i)
            generatedNumbers[i] = qrand();

        qsrand(seed);
        generatesSameSequence = true;
        for (int i=0; i<numTestValues; ++i)
            if (generatedNumbers[i] != qrand())
                generatesSameSequence = false;

        QVERIFY(generatesSameSequence);
    }
}

QTEST_MAIN(tst_QRand)
#include "tst_qrand.moc"