/*

* This file is part of Notepad Next.

* Copyright 2026 NotepadAI contributors

*

* Notepad Next is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*/

#include <QtTest>

#include "GitNumstatParser.h"

class TestGitNumstatParser : public QObject

{

Q_OBJECT

private slots:

void empty_returnsEmpty();

void normalRecord_parsedCounts();

void multipleRecords_allInserted();

void binaryRecord_setsFlag();

void renamedRecord_keyedByNewPath();

void utf8Path_preserved();

void mixedRecords_normalRenamedBinary();

void truncatedInput_doesNotCrash();

};

void TestGitNumstatParser::empty_returnsEmpty()

{

QHash<QString, GitNumstatParser::Stat> r = GitNumstatParser::parse(QByteArray());

QCOMPARE(r.size(), 0);

}

void TestGitNumstatParser::normalRecord_parsedCounts()

{

// added=12, deleted=3, path=foo/bar.cpp

QByteArray in;

in.append("12\t3\tfoo/bar.cpp");

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 1);

QVERIFY(r.contains(QStringLiteral("foo/bar.cpp")));

const auto s = r.value(QStringLiteral("foo/bar.cpp"));

QCOMPARE(s.added, 12);

QCOMPARE(s.deleted, 3);

QVERIFY(!s.isBinary);

}

void TestGitNumstatParser::multipleRecords_allInserted()

{

QByteArray in;

in.append("5\t2\ta.cpp");

in.append('\0');

in.append("0\t10\tb.cpp");

in.append('\0');

in.append("100\t0\tdir/c.cpp");

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 3);

QCOMPARE(r.value("a.cpp").added, 5);

QCOMPARE(r.value("a.cpp").deleted, 2);

QCOMPARE(r.value("b.cpp").added, 0);

QCOMPARE(r.value("b.cpp").deleted, 10);

QCOMPARE(r.value("dir/c.cpp").added, 100);

QCOMPARE(r.value("dir/c.cpp").deleted, 0);

}

void TestGitNumstatParser::binaryRecord_setsFlag()

{

QByteArray in;

in.append("-\t-\tassets/logo.png");

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 1);

const auto s = r.value(QStringLiteral("assets/logo.png"));

QVERIFY(s.isBinary);

QCOMPARE(s.added, -1);

QCOMPARE(s.deleted, -1);

}

void TestGitNumstatParser::renamedRecord_keyedByNewPath()

{

// Format: "added\tdeleted\t\0orig\0new\0"

QByteArray in;

in.append("7\t1\t");

in.append('\0');

in.append("old/path.cpp");

in.append('\0');

in.append("new/path.cpp");

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 1);

// Renamed records are keyed by the *new* path.

QVERIFY(r.contains(QStringLiteral("new/path.cpp")));

QVERIFY(!r.contains(QStringLiteral("old/path.cpp")));

const auto s = r.value(QStringLiteral("new/path.cpp"));

QCOMPARE(s.added, 7);

QCOMPARE(s.deleted, 1);

QVERIFY(!s.isBinary);

}

void TestGitNumstatParser::utf8Path_preserved()

{

const QString viPath = QStringLiteral("tài_liệu/báo_cáo.md");

QByteArray in;

in.append("3\t4\t");

in.append(viPath.toUtf8());

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 1);

QVERIFY(r.contains(viPath));

QCOMPARE(r.value(viPath).added, 3);

QCOMPARE(r.value(viPath).deleted, 4);

}

void TestGitNumstatParser::mixedRecords_normalRenamedBinary()

{

QByteArray in;

// Normal

in.append("10\t2\tsrc/main.cpp");

in.append('\0');

// Renamed

in.append("0\t0\t");

in.append('\0');

in.append("src/old.h");

in.append('\0');

in.append("src/new.h");

in.append('\0');

// Binary

in.append("-\t-\tdoc/diagram.png");

in.append('\0');

// Normal again after a renamed (verifies state recovery)

in.append("1\t1\tREADME.md");

in.append('\0');

auto r = GitNumstatParser::parse(in);

QCOMPARE(r.size(), 4);

QVERIFY(r.contains("src/main.cpp"));

QCOMPARE(r.value("src/main.cpp").added, 10);

QCOMPARE(r.value("src/main.cpp").deleted, 2);

QVERIFY(r.contains("src/new.h"));

QVERIFY(!r.contains("src/old.h"));

QVERIFY(r.contains("doc/diagram.png"));

QVERIFY(r.value("doc/diagram.png").isBinary);

QVERIFY(r.contains("README.md"));

QCOMPARE(r.value("README.md").added, 1);

QCOMPARE(r.value("README.md").deleted, 1);

}

void TestGitNumstatParser::truncatedInput_doesNotCrash()

{

// Missing trailing nul + missing second tab variants — parser must just stop

// without dereferencing past end.

QByteArray a;

a.append("12\t");

(void)GitNumstatParser::parse(a);

QByteArray b;

b.append("12");

(void)GitNumstatParser::parse(b);

QByteArray c;

c.append("12\t3\tpath_no_nul");

auto rc = GitNumstatParser::parse(c);

// Path without trailing NUL: parser falls back to end-of-buffer.

QCOMPARE(rc.size(), 1);

QVERIFY(rc.contains(QStringLiteral("path_no_nul")));

QByteArray d;

d.append("7\t1\t");

d.append('\0');

d.append("orig_only");

// Missing newPath nul → must bail out, no insert, no crash.

auto rd = GitNumstatParser::parse(d);

QCOMPARE(rd.size(), 0);

}

QTEST_GUILESS_MAIN(TestGitNumstatParser)

#include "test_git_numstat_parser.moc"