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// Copyright (C) 2014 David Faure <david.faure@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QDebug>
#include <QIODevice>
#include <QString>
#include <QBuffer>
#include <qtest.h>
class tst_QTextStream : public QObject
{
Q_OBJECT
private slots:
void writeSingleChar_data();
void writeSingleChar();
private:
};
enum Output { StringOutput, DeviceOutput };
Q_DECLARE_METATYPE(Output);
enum Input { CharStarInput, QStringInput, CharInput, QCharInput };
Q_DECLARE_METATYPE(Input);
void tst_QTextStream::writeSingleChar_data()
{
QTest::addColumn<Output>("output");
QTest::addColumn<Input>("input");
QTest::newRow("string_charstar") << StringOutput << CharStarInput;
QTest::newRow("string_string") << StringOutput << QStringInput;
QTest::newRow("string_char") << StringOutput << CharInput;
QTest::newRow("string_qchar") << StringOutput << QCharInput;
QTest::newRow("device_charstar") << DeviceOutput << CharStarInput;
QTest::newRow("device_string") << DeviceOutput << QStringInput;
QTest::newRow("device_char") << DeviceOutput << CharInput;
QTest::newRow("device_qchar") << DeviceOutput << QCharInput;
}
void tst_QTextStream::writeSingleChar()
{
QFETCH(Output, output);
QFETCH(Input, input);
QString str;
QBuffer buffer;
QTextStream stream;
if (output == StringOutput) {
stream.setString(&str, QIODevice::WriteOnly);
} else {
QVERIFY(buffer.open(QIODevice::WriteOnly));
stream.setDevice(&buffer);
}
// Test many different ways to write a single char into a QTextStream
QString inputString = "h";
const int amount = 100000;
switch (input) {
case CharStarInput:
QBENCHMARK {
for (qint64 i = 0; i < amount; ++i)
stream << "h";
}
break;
case QStringInput:
QBENCHMARK {
for (qint64 i = 0; i < amount; ++i)
stream << inputString;
}
break;
case CharInput:
QBENCHMARK {
for (qint64 i = 0; i < amount; ++i)
stream << 'h';
}
break;
case QCharInput:
QBENCHMARK {
for (qint64 i = 0; i < amount; ++i)
stream << QChar('h');
}
break;
}
QString result;
if (output == StringOutput)
result = str;
else
result = QString(buffer.data());
QCOMPARE(result.left(10), QString("hhhhhhhhhh"));
}
QTEST_MAIN(tst_QTextStream)
#include "tst_bench_qtextstream.moc"
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