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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 <QtCore/QCoreApplication>
#include <QtCore/qfloat16.h>
#include <QtTest/QtTest>
#include <QDebug>
class tst_float: public QObject
{
Q_OBJECT
private slots:
void floatComparisons() const;
void floatComparisons_data() const;
void float16Comparisons() const;
void float16Comparisons_data() const;
void compareFloatTests() const;
void compareFloatTests_data() const;
};
void tst_float::floatComparisons() const
{
QFETCH(float, operandLeft);
QFETCH(float, operandRight);
QCOMPARE(operandLeft, operandRight);
}
void tst_float::floatComparisons_data() const
{
QTest::addColumn<float>("operandLeft");
QTest::addColumn<float>("operandRight");
QTest::newRow("should SUCCEED 1")
<< float(0)
<< float(0);
QTest::newRow("should FAIL 1")
<< float(1.00000)
<< float(3.00000);
QTest::newRow("should FAIL 2")
<< float(1.00000e-7f)
<< float(3.00000e-7f);
// QCOMPARE for floats uses qFuzzyCompare(), which succeeds if the numbers
// differ by no more than 1/100,000th of the smaller value. Thus
// QCOMPARE(99998, 99999) should fail, while QCOMPARE(100001, 100002)
// should pass.
QTest::newRow("should FAIL 3")
<< float(99998)
<< float(99999);
QTest::newRow("should SUCCEED 2")
<< float(100001)
<< float(100002);
}
void tst_float::float16Comparisons() const
{
QFETCH(qfloat16, operandLeft);
QFETCH(qfloat16, operandRight);
QCOMPARE(operandLeft, operandRight);
}
void tst_float::float16Comparisons_data() const
{
QTest::addColumn<qfloat16>("operandLeft");
QTest::addColumn<qfloat16>("operandRight");
QTest::newRow("should SUCCEED 1")
<< qfloat16(0)
<< qfloat16(0);
QTest::newRow("should FAIL 1")
<< qfloat16(1.000)
<< qfloat16(3.000);
QTest::newRow("should FAIL 2")
<< qfloat16(1.000e-4f)
<< qfloat16(3.000e-4f);
// QCOMPARE for qfloat16s uses qFuzzyCompare()
QTest::newRow("should FAIL 3")
<< qfloat16(98)
<< qfloat16(99);
QTest::newRow("should SUCCEED 2")
<< qfloat16(1001)
<< qfloat16(1002);
}
void tst_float::compareFloatTests() const
{
QFETCH(float, t1);
// Create two more values
// t2 differs from t1 by 1 ppm (part per million)
// t3 differs from t1 by 200%
// we should consider that t1 == t2 and t1 != t3
const float t2 = t1 + (t1 / 1e6);
const float t3 = 3 * t1;
QCOMPARE(t1, t2);
/* Should FAIL. */
QCOMPARE(t1, t3);
}
void tst_float::compareFloatTests_data() const
{
QTest::addColumn<float>("t1");
QTest::newRow("1e0") << 1e0f;
QTest::newRow("1e-7") << 1e-7f;
QTest::newRow("1e+7") << 1e+7f;
}
QTEST_MAIN(tst_float)
#include "tst_float.moc"
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