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2433ee7da0e40c3f399d9cd89a46ed250ec6516f
qt-creator/tests/auto/diff/differ/tst_differ.cpp
jkobus 2433ee7da0 Add autotests for diff editor 
Change-Id: I46c1d5c623b0ffd8c0dc16d218094d05c9975ea5
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>
2013-03-12 13:56:54 +01:00

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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.
**
****************************************************************************/
#include <QtTest>
#include <QObject>
#include <QList>
#include <QTextDocument>
#include <QTextBlock>
#include <QMetaType>
#include <diffeditor/differ.h>
Q_DECLARE_METATYPE(DiffEditor::Diff);
Q_DECLARE_METATYPE(QList<DiffEditor::Diff>);
using namespace DiffEditor;
namespace QTest {
template<>
char *toString(const Diff &diff)
{
QByteArray ba = diff.toString().toUtf8();
return qstrdup(ba.data());
}
}
namespace QTest {
template<>
char *toString(const QList<Diff> &diffList)
{
QByteArray ba = "QList(" + QByteArray::number(diffList.count()) + " diffs:";
for (int i = 0; i < diffList.count(); i++) {
if (i > 0)
ba += ",";
ba += " " + QByteArray::number(i + 1) + ". " + diffList.at(i).toString().toUtf8();
}
ba += ")";
return qstrdup(ba.data());
}
}
class tst_Differ: public QObject
{
Q_OBJECT
private Q_SLOTS:
void preprocess_data();
void preprocess();
void myers_data();
void myers();
void merge_data();
void merge();
};
void tst_Differ::preprocess_data()
{
QTest::addColumn<QString>("text1");
QTest::addColumn<QString>("text2");
QTest::addColumn<QList<Diff> >("expected");
QTest::newRow("Null texts") << QString() << QString() << QList<Diff>();
QTest::newRow("Empty texts") << QString("") << QString("") << QList<Diff>();
QTest::newRow("Null and empty text") << QString() << QString("") << QList<Diff>();
QTest::newRow("Empty and null text") << QString("") << QString() << QList<Diff>();
QTest::newRow("Simple delete") << QString("A") << QString() << (QList<Diff>() << Diff(Diff::Delete, QString("A")));
QTest::newRow("Simple insert") << QString() << QString("A") << (QList<Diff>() << Diff(Diff::Insert, QString("A")));
QTest::newRow("Simple equal") << QString("A") << QString("A") << (QList<Diff>()
<< Diff(Diff::Equal, QString("A")));
QTest::newRow("Common prefix 1") << QString("ABCD") << QString("AB") << (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Delete, QString("CD")));
QTest::newRow("Common prefix 2") << QString("AB") << QString("ABCD") << (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CD")));
QTest::newRow("Common suffix 1") << QString("ABCD") << QString("CD") << (QList<Diff>()
<< Diff(Diff::Delete, QString("AB"))
<< Diff(Diff::Equal, QString("CD")));
QTest::newRow("Common suffix 2") << QString("CD") << QString("ABCD") << (QList<Diff>()
<< Diff(Diff::Insert, QString("AB"))
<< Diff(Diff::Equal, QString("CD")));
QTest::newRow("Common prefix and suffix 1") << QString("ABCDEF") << QString("ABEF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Delete, QString("CD"))
<< Diff(Diff::Equal, QString("EF")));
QTest::newRow("Common prefix and suffix 2") << QString("ABEF") << QString("ABCDEF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CD"))
<< Diff(Diff::Equal, QString("EF")));
QTest::newRow("Two edits 1") << QString("ABCDEF") << QString("ACDF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("A")) // prefix
<< Diff(Diff::Delete, QString("B"))
<< Diff(Diff::Equal, QString("CD")) // CD inside BCDE
<< Diff(Diff::Delete, QString("E"))
<< Diff(Diff::Equal, QString("F"))); // suffix
QTest::newRow("Two edits 2") << QString("ACDF") << QString("ABCDEF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("A")) // prefix
<< Diff(Diff::Insert, QString("B"))
<< Diff(Diff::Equal, QString("CD")) // CD inside BCDE
<< Diff(Diff::Insert, QString("E"))
<< Diff(Diff::Equal, QString("F"))); // suffix
QTest::newRow("Single char not in the other text 1") << QString("ABCDEF") << QString("AXF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("A")) // prefix
<< Diff(Diff::Delete, QString("BCDE"))
<< Diff(Diff::Insert, QString("X")) // single char not in the other text
<< Diff(Diff::Equal, QString("F"))); // suffix
QTest::newRow("Single char not in the other text 2") << QString("AXF") << QString("ABCDEF") << (QList<Diff>()
<< Diff(Diff::Equal, QString("A")) // prefix
<< Diff(Diff::Delete, QString("X")) // single char not in the other text
<< Diff(Diff::Insert, QString("BCDE"))
<< Diff(Diff::Equal, QString("F"))); // suffix
}
void tst_Differ::preprocess()
{
QFETCH(QString, text1);
QFETCH(QString, text2);
QFETCH(QList<Diff>, expected);
Differ differ;
QList<Diff> result = differ.diff(text1, text2);
QCOMPARE(result, expected);
}
void tst_Differ::myers_data()
{
QTest::addColumn<QString>("text1");
QTest::addColumn<QString>("text2");
QTest::addColumn<QList<Diff> >("expected");
QTest::newRow("Myers 1") << QString("XAXCXABC") << QString("ABCY") << (QList<Diff>()
<< Diff(Diff::Delete, QString("XAXCX"))
<< Diff(Diff::Equal, QString("ABC"))
<< Diff(Diff::Insert, QString("Y")));
}
void tst_Differ::myers()
{
QFETCH(QString, text1);
QFETCH(QString, text2);
QFETCH(QList<Diff>, expected);
Differ differ;
QList<Diff> result = differ.diff(text1, text2);
QCOMPARE(result, expected);
}
void tst_Differ::merge_data()
{
QTest::addColumn<QList<Diff> >("input");
QTest::addColumn<QList<Diff> >("expected");
QTest::newRow("Remove null insert")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString()))
<< QList<Diff>();
QTest::newRow("Remove null delete")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString()))
<< QList<Diff>();
QTest::newRow("Remove null equal")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString()))
<< QList<Diff>();
QTest::newRow("Remove empty insert")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("")))
<< QList<Diff>();
QTest::newRow("Remove empty delete")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("")))
<< QList<Diff>();
QTest::newRow("Remove empty equal")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("")))
<< QList<Diff>();
QTest::newRow("Remove empty inserts")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString(""))
<< Diff(Diff::Insert, QString()))
<< QList<Diff>();
QTest::newRow("Remove empty deletes")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString(""))
<< Diff(Diff::Delete, QString()))
<< QList<Diff>();
QTest::newRow("Remove empty equals")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString(""))
<< Diff(Diff::Equal, QString()))
<< QList<Diff>();
QTest::newRow("Remove empty inserts / deletes / equals")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString(""))
<< Diff(Diff::Delete, QString(""))
<< Diff(Diff::Equal, QString(""))
<< Diff(Diff::Insert, QString())
<< Diff(Diff::Delete, QString())
<< Diff(Diff::Equal, QString()))
<< QList<Diff>();
QTest::newRow("Two equals")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Equal, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD")));
QTest::newRow("Two deletes")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("AB"))
<< Diff(Diff::Delete, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("ABCD")));
QTest::newRow("Two inserts")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("AB"))
<< Diff(Diff::Insert, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("ABCD")));
QTest::newRow("Change order of insert / delete")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("AB"))
<< Diff(Diff::Delete, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("CD"))
<< Diff(Diff::Insert, QString("AB")));
QTest::newRow("Squash into equal 1")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("AB"))
<< Diff(Diff::Delete, QString("AB")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB")));
QTest::newRow("Squash into equal 2")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("A"))
<< Diff(Diff::Delete, QString("ABC"))
<< Diff(Diff::Insert, QString("B"))
<< Diff(Diff::Delete, QString("D"))
<< Diff(Diff::Insert, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD")));
QTest::newRow("Prefix and suffix detection 1")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("A"))
<< Diff(Diff::Insert, QString("ABC"))
<< Diff(Diff::Delete, QString("DC")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("A"))
<< Diff(Diff::Delete, QString("D"))
<< Diff(Diff::Insert, QString("B"))
<< Diff(Diff::Equal, QString("C")));
QTest::newRow("Prefix and suffix detection 2")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("X"))
<< Diff(Diff::Delete, QString("A"))
<< Diff(Diff::Insert, QString("ABC"))
<< Diff(Diff::Delete, QString("DC"))
<< Diff(Diff::Equal, QString("Y")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("XA"))
<< Diff(Diff::Delete, QString("D"))
<< Diff(Diff::Insert, QString("B"))
<< Diff(Diff::Equal, QString("CY")));
QTest::newRow("Merge inserts")
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("AB"))
<< Diff(Diff::Delete, QString("CD"))
<< Diff(Diff::Insert, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("CD"))
<< Diff(Diff::Insert, QString("ABEF")));
QTest::newRow("Merge deletes")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("AB"))
<< Diff(Diff::Insert, QString("CD"))
<< Diff(Diff::Delete, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("ABEF"))
<< Diff(Diff::Insert, QString("CD")));
QTest::newRow("Merge many")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("A"))
<< Diff(Diff::Equal, QString("B"))
<< Diff(Diff::Insert, QString("CD"))
<< Diff(Diff::Delete, QString("EF"))
<< Diff(Diff::Insert, QString("GH"))
<< Diff(Diff::Delete, QString("IJ"))
<< Diff(Diff::Equal, QString("K"))
<< Diff(Diff::Equal, QString("L")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Delete, QString("EFIJ"))
<< Diff(Diff::Insert, QString("CDGH"))
<< Diff(Diff::Equal, QString("KL")));
QTest::newRow("Don't merge")
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("AB"))
<< Diff(Diff::Insert, QString("CD"))
<< Diff(Diff::Equal, QString("EF"))
<< Diff(Diff::Delete, QString("GH"))
<< Diff(Diff::Insert, QString("IJ")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("AB"))
<< Diff(Diff::Insert, QString("CD"))
<< Diff(Diff::Equal, QString("EF"))
<< Diff(Diff::Delete, QString("GH"))
<< Diff(Diff::Insert, QString("IJ")));
QTest::newRow("Squash equalities surrounding insert sliding edit left")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDAB"))
<< Diff(Diff::Equal, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Insert, QString("ABCD"))
<< Diff(Diff::Equal, QString("ABEF")));
QTest::newRow("Squash equalities surrounding insert sliding edit right")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDEF"))
<< Diff(Diff::Equal, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD"))
<< Diff(Diff::Insert, QString("EFCD")));
QTest::newRow("Squash equalities surrounding delete sliding edit left")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Delete, QString("CDAB"))
<< Diff(Diff::Equal, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Delete, QString("ABCD"))
<< Diff(Diff::Equal, QString("ABEF")));
QTest::newRow("Squash equalities surrounding delete sliding edit right")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Delete, QString("CDEF"))
<< Diff(Diff::Equal, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD"))
<< Diff(Diff::Delete, QString("EFCD")));
QTest::newRow("Squash equalities complex 1")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDGH"))
<< Diff(Diff::Equal, QString("CD"))
<< Diff(Diff::Insert, QString("EFIJ"))
<< Diff(Diff::Equal, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD"))
<< Diff(Diff::Insert, QString("GHCDEFIJ"))
<< Diff(Diff::Equal, QString("EF")));
QTest::newRow("Squash equalities complex 2")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDGH"))
<< Diff(Diff::Equal, QString("CD"))
<< Diff(Diff::Delete, QString("EFIJ"))
<< Diff(Diff::Equal, QString("EF")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD"))
<< Diff(Diff::Delete, QString("EFIJ"))
<< Diff(Diff::Insert, QString("GHCD"))
<< Diff(Diff::Equal, QString("EF")));
QTest::newRow("Squash equalities complex 3")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDEF"))
<< Diff(Diff::Equal, QString("CD"))
<< Diff(Diff::Insert, QString("GH")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCD"))
<< Diff(Diff::Insert, QString("EFCDGH")));
QTest::newRow("Squash equalities complex 4")
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("AB"))
<< Diff(Diff::Insert, QString("CDEF"))
<< Diff(Diff::Equal, QString("CD"))
<< Diff(Diff::Insert, QString("GH"))
<< Diff(Diff::Equal, QString("EF"))
<< Diff(Diff::Insert, QString("IJ"))
<< Diff(Diff::Equal, QString("CD")))
<< (QList<Diff>()
<< Diff(Diff::Equal, QString("ABCDEFCD"))
<< Diff(Diff::Insert, QString("GHEFIJCD")));
}
void tst_Differ::merge()
{
QFETCH(QList<Diff>, input);
QFETCH(QList<Diff>, expected);
Differ differ;
QList<Diff> result = differ.merge(input);
QCOMPARE(result, expected);
}
QTEST_MAIN(tst_Differ)
#include "tst_differ.moc"
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