diff-match-patch/cpp/diff_match_patch_test.cpp at master · google/diff-match-patch · GitHub

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* Diff Match and Patch -- Test Harness

* https://github.com/google/diff-match-patch

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

// Code known to compile and run with Qt 4.3 through Qt 4.7.

#include <QtCore>

#include "diff_match_patch.h"

#include "diff_match_patch_test.h"

int main(int argc, char **argv) {

diff_match_patch_test dmp_test;

qDebug("Starting diff_match_patch unit tests.");

dmp_test.run_all_tests();

qDebug("Done.");

return 0;

Q_UNUSED(argc)

Q_UNUSED(argv)

}

diff_match_patch_test::diff_match_patch_test() {

}

void diff_match_patch_test::run_all_tests() {

QTime t;

t.start();

try {

testDiffCommonPrefix();

testDiffCommonSuffix();

testDiffCommonOverlap();

testDiffHalfmatch();

testDiffLinesToChars();

testDiffCharsToLines();

testDiffCleanupMerge();

testDiffCleanupSemanticLossless();

testDiffCleanupSemantic();

testDiffCleanupEfficiency();

testDiffPrettyHtml();

testDiffText();

testDiffDelta();

testDiffXIndex();

testDiffLevenshtein();

testDiffBisect();

testDiffMain();

testMatchAlphabet();

testMatchBitap();

testMatchMain();

testPatchObj();

testPatchFromText();

testPatchToText();

testPatchAddContext();

testPatchMake();

testPatchSplitMax();

testPatchAddPadding();

testPatchApply();

qDebug("All tests passed.");

} catch (QString strCase) {

qDebug("Test failed: %s", qPrintable(strCase));

}

qDebug("Total time: %d ms", t.elapsed());

}

// DIFF TEST FUNCTIONS

void diff_match_patch_test::testDiffCommonPrefix() {

// Detect any common prefix.

assertEquals("diff_commonPrefix: Null case.", 0, dmp.diff_commonPrefix("abc", "xyz"));

assertEquals("diff_commonPrefix: Non-null case.", 4, dmp.diff_commonPrefix("1234abcdef", "1234xyz"));

assertEquals("diff_commonPrefix: Whole case.", 4, dmp.diff_commonPrefix("1234", "1234xyz"));

}

void diff_match_patch_test::testDiffCommonSuffix() {

// Detect any common suffix.

assertEquals("diff_commonSuffix: Null case.", 0, dmp.diff_commonSuffix("abc", "xyz"));

assertEquals("diff_commonSuffix: Non-null case.", 4, dmp.diff_commonSuffix("abcdef1234", "xyz1234"));

assertEquals("diff_commonSuffix: Whole case.", 4, dmp.diff_commonSuffix("1234", "xyz1234"));

}

void diff_match_patch_test::testDiffCommonOverlap() {

// Detect any suffix/prefix overlap.

assertEquals("diff_commonOverlap: Null case.", 0, dmp.diff_commonOverlap("", "abcd"));

assertEquals("diff_commonOverlap: Whole case.", 3, dmp.diff_commonOverlap("abc", "abcd"));

assertEquals("diff_commonOverlap: No overlap.", 0, dmp.diff_commonOverlap("123456", "abcd"));

assertEquals("diff_commonOverlap: Overlap.", 3, dmp.diff_commonOverlap("123456xxx", "xxxabcd"));

// Some overly clever languages (C#) may treat ligatures as equal to their

// component letters. E.g. U+FB01 == 'fi'

assertEquals("diff_commonOverlap: Unicode.", 0, dmp.diff_commonOverlap("fi", QString::fromWCharArray((const wchar_t*) L"\ufb01i", 2)));

}

void diff_match_patch_test::testDiffHalfmatch() {

// Detect a halfmatch.

dmp.Diff_Timeout = 1;

assertEmpty("diff_halfMatch: No match #1.", dmp.diff_halfMatch("1234567890", "abcdef"));

assertEmpty("diff_halfMatch: No match #2.", dmp.diff_halfMatch("12345", "23"));

assertEquals("diff_halfMatch: Single Match #1.", QString("12,90,a,z,345678").split(","), dmp.diff_halfMatch("1234567890", "a345678z"));

assertEquals("diff_halfMatch: Single Match #2.", QString("a,z,12,90,345678").split(","), dmp.diff_halfMatch("a345678z", "1234567890"));

assertEquals("diff_halfMatch: Single Match #3.", QString("abc,z,1234,0,56789").split(","), dmp.diff_halfMatch("abc56789z", "1234567890"));

assertEquals("diff_halfMatch: Single Match #4.", QString("a,xyz,1,7890,23456").split(","), dmp.diff_halfMatch("a23456xyz", "1234567890"));

assertEquals("diff_halfMatch: Multiple Matches #1.", QString("12123,123121,a,z,1234123451234").split(","), dmp.diff_halfMatch("121231234123451234123121", "a1234123451234z"));

assertEquals("diff_halfMatch: Multiple Matches #2.", QString(",-=-=-=-=-=,x,,x-=-=-=-=-=-=-=").split(","), dmp.diff_halfMatch("x-=-=-=-=-=-=-=-=-=-=-=-=", "xx-=-=-=-=-=-=-="));

assertEquals("diff_halfMatch: Multiple Matches #3.", QString("-=-=-=-=-=,,,y,-=-=-=-=-=-=-=y").split(","), dmp.diff_halfMatch("-=-=-=-=-=-=-=-=-=-=-=-=y", "-=-=-=-=-=-=-=yy"));

// Optimal diff would be -q+x=H-i+e=lloHe+Hu=llo-Hew+y not -qHillo+x=HelloHe-w+Hulloy

assertEquals("diff_halfMatch: Non-optimal halfmatch.", QString("qHillo,w,x,Hulloy,HelloHe").split(","), dmp.diff_halfMatch("qHilloHelloHew", "xHelloHeHulloy"));

dmp.Diff_Timeout = 0;

assertEmpty("diff_halfMatch: Optimal no halfmatch.", dmp.diff_halfMatch("qHilloHelloHew", "xHelloHeHulloy"));

}

void diff_match_patch_test::testDiffLinesToChars() {

// Convert lines down to characters.

QStringList tmpVector;

QList<QVariant> tmpVarList;

tmpVector.append("");

tmpVector.append("alpha\n");

tmpVector.append("beta\n");

tmpVarList << QVariant::fromValue(QString() + QChar((ushort)1) + QChar((ushort)2) + QChar((ushort)1)); //(("\u0001\u0002\u0001"));

tmpVarList << QVariant::fromValue(QString() + QChar((ushort)2) + QChar((ushort)1) + QChar((ushort)2)); // (("\u0002\u0001\u0002"));

tmpVarList << QVariant::fromValue(tmpVector);

assertEquals("diff_linesToChars:", tmpVarList, dmp.diff_linesToChars("alpha\nbeta\nalpha\n", "beta\nalpha\nbeta\n"));

tmpVector.clear();

tmpVarList.clear();

tmpVector.append("");

tmpVector.append("alpha\r\n");

tmpVector.append("beta\r\n");

tmpVector.append("\r\n");

tmpVarList << QVariant::fromValue(QString(""));

tmpVarList << QVariant::fromValue(QString() + QChar((ushort)1) + QChar((ushort)2) + QChar((ushort)3) + QChar((ushort)3)); // (("\u0001\u0002\u0003\u0003"));

tmpVarList << QVariant::fromValue(tmpVector);

assertEquals("diff_linesToChars:", tmpVarList, dmp.diff_linesToChars("", "alpha\r\nbeta\r\n\r\n\r\n"));

tmpVector.clear();

tmpVarList.clear();

tmpVector.append("");

tmpVector.append("a");

tmpVector.append("b");

tmpVarList << QVariant::fromValue(QString() + QChar((ushort)1)); // (("\u0001"));

tmpVarList << QVariant::fromValue(QString() + QChar((ushort)2)); // (("\u0002"));

tmpVarList << QVariant::fromValue(tmpVector);

assertEquals("diff_linesToChars:", tmpVarList, dmp.diff_linesToChars("a", "b"));

// More than 256 to reveal any 8-bit limitations.

int n = 300;

tmpVector.clear();

tmpVarList.clear();

QString lines;

QString chars;

for (int x = 1; x < n + 1; x++) {

tmpVector.append(QString::number(x) + "\n");

lines += QString::number(x) + "\n";

chars += QChar(static_cast<ushort>(x));

}

assertEquals("diff_linesToChars: More than 256 (setup).", n, tmpVector.size());

assertEquals("diff_linesToChars: More than 256 (setup).", n, chars.length());

tmpVector.prepend("");

tmpVarList << QVariant::fromValue(chars);

tmpVarList << QVariant::fromValue(QString(""));

tmpVarList << QVariant::fromValue(tmpVector);

assertEquals("diff_linesToChars: More than 256.", tmpVarList, dmp.diff_linesToChars(lines, ""));

}

void diff_match_patch_test::testDiffCharsToLines() {

// First check that Diff equality works.

assertTrue("diff_charsToLines:", Diff(EQUAL, "a") == Diff(EQUAL, "a"));

assertEquals("diff_charsToLines:", Diff(EQUAL, "a"), Diff(EQUAL, "a"));

// Convert chars up to lines.

QList<Diff> diffs;

diffs << Diff(EQUAL, QString() + QChar((ushort)1) + QChar((ushort)2) + QChar((ushort)1)); // ("\u0001\u0002\u0001");

diffs << Diff(INSERT, QString() + QChar((ushort)2) + QChar((ushort)1) + QChar((ushort)2)); // ("\u0002\u0001\u0002");

QStringList tmpVector;

tmpVector.append("");

tmpVector.append("alpha\n");

tmpVector.append("beta\n");

dmp.diff_charsToLines(diffs, tmpVector);

assertEquals("diff_charsToLines:", diffList(Diff(EQUAL, "alpha\nbeta\nalpha\n"), Diff(INSERT, "beta\nalpha\nbeta\n")), diffs);

// More than 256 to reveal any 8-bit limitations.

int n = 300;

tmpVector.clear();

QList<QVariant> tmpVarList;

QString lines;

QString chars;

for (int x = 1; x < n + 1; x++) {

tmpVector.append(QString::number(x) + "\n");

lines += QString::number(x) + "\n";

chars += QChar(static_cast<ushort>(x));

}

assertEquals("diff_linesToChars: More than 256 (setup).", n, tmpVector.size());

assertEquals("diff_linesToChars: More than 256 (setup).", n, chars.length());

tmpVector.prepend("");

diffs = diffList(Diff(DELETE, chars));

dmp.diff_charsToLines(diffs, tmpVector);

assertEquals("diff_charsToLines: More than 256.", diffList(Diff(DELETE, lines)), diffs);

}

void diff_match_patch_test::testDiffCleanupMerge() {

// Cleanup a messy diff.

QList<Diff> diffs;

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Null case.", diffList(), diffs);

diffs = diffList(Diff(EQUAL, "a"), Diff(DELETE, "b"), Diff(INSERT, "c"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: No change case.", diffList(Diff(EQUAL, "a"), Diff(DELETE, "b"), Diff(INSERT, "c")), diffs);

diffs = diffList(Diff(EQUAL, "a"), Diff(EQUAL, "b"), Diff(EQUAL, "c"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Merge equalities.", diffList(Diff(EQUAL, "abc")), diffs);

diffs = diffList(Diff(DELETE, "a"), Diff(DELETE, "b"), Diff(DELETE, "c"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Merge deletions.", diffList(Diff(DELETE, "abc")), diffs);

diffs = diffList(Diff(INSERT, "a"), Diff(INSERT, "b"), Diff(INSERT, "c"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Merge insertions.", diffList(Diff(INSERT, "abc")), diffs);

diffs = diffList(Diff(DELETE, "a"), Diff(INSERT, "b"), Diff(DELETE, "c"), Diff(INSERT, "d"), Diff(EQUAL, "e"), Diff(EQUAL, "f"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Merge interweave.", diffList(Diff(DELETE, "ac"), Diff(INSERT, "bd"), Diff(EQUAL, "ef")), diffs);

diffs = diffList(Diff(DELETE, "a"), Diff(INSERT, "abc"), Diff(DELETE, "dc"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Prefix and suffix detection.", diffList(Diff(EQUAL, "a"), Diff(DELETE, "d"), Diff(INSERT, "b"), Diff(EQUAL, "c")), diffs);

diffs = diffList(Diff(EQUAL, "x"), Diff(DELETE, "a"), Diff(INSERT, "abc"), Diff(DELETE, "dc"), Diff(EQUAL, "y"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Prefix and suffix detection with equalities.", diffList(Diff(EQUAL, "xa"), Diff(DELETE, "d"), Diff(INSERT, "b"), Diff(EQUAL, "cy")), diffs);

diffs = diffList(Diff(EQUAL, "a"), Diff(INSERT, "ba"), Diff(EQUAL, "c"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Slide edit left.", diffList(Diff(INSERT, "ab"), Diff(EQUAL, "ac")), diffs);

diffs = diffList(Diff(EQUAL, "c"), Diff(INSERT, "ab"), Diff(EQUAL, "a"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Slide edit right.", diffList(Diff(EQUAL, "ca"), Diff(INSERT, "ba")), diffs);

diffs = diffList(Diff(EQUAL, "a"), Diff(DELETE, "b"), Diff(EQUAL, "c"), Diff(DELETE, "ac"), Diff(EQUAL, "x"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Slide edit left recursive.", diffList(Diff(DELETE, "abc"), Diff(EQUAL, "acx")), diffs);

diffs = diffList(Diff(EQUAL, "x"), Diff(DELETE, "ca"), Diff(EQUAL, "c"), Diff(DELETE, "b"), Diff(EQUAL, "a"));

dmp.diff_cleanupMerge(diffs);

assertEquals("diff_cleanupMerge: Slide edit right recursive.", diffList(Diff(EQUAL, "xca"), Diff(DELETE, "cba")), diffs);

}

void diff_match_patch_test::testDiffCleanupSemanticLossless() {

// Slide diffs to match logical boundaries.

QList<Diff> diffs = diffList();

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Null case.", diffList(), diffs);

diffs = diffList(Diff(EQUAL, "AAA\r\n\r\nBBB"), Diff(INSERT, "\r\nDDD\r\n\r\nBBB"), Diff(EQUAL, "\r\nEEE"));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemanticLossless: Blank lines.", diffList(Diff(EQUAL, "AAA\r\n\r\n"), Diff(INSERT, "BBB\r\nDDD\r\n\r\n"), Diff(EQUAL, "BBB\r\nEEE")), diffs);

diffs = diffList(Diff(EQUAL, "AAA\r\nBBB"), Diff(INSERT, " DDD\r\nBBB"), Diff(EQUAL, " EEE"));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemanticLossless: Line boundaries.", diffList(Diff(EQUAL, "AAA\r\n"), Diff(INSERT, "BBB DDD\r\n"), Diff(EQUAL, "BBB EEE")), diffs);

diffs = diffList(Diff(EQUAL, "The c"), Diff(INSERT, "ow and the c"), Diff(EQUAL, "at."));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Word boundaries.", diffList(Diff(EQUAL, "The "), Diff(INSERT, "cow and the "), Diff(EQUAL, "cat.")), diffs);

diffs = diffList(Diff(EQUAL, "The-c"), Diff(INSERT, "ow-and-the-c"), Diff(EQUAL, "at."));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Alphanumeric boundaries.", diffList(Diff(EQUAL, "The-"), Diff(INSERT, "cow-and-the-"), Diff(EQUAL, "cat.")), diffs);

diffs = diffList(Diff(EQUAL, "a"), Diff(DELETE, "a"), Diff(EQUAL, "ax"));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Hitting the start.", diffList(Diff(DELETE, "a"), Diff(EQUAL, "aax")), diffs);

diffs = diffList(Diff(EQUAL, "xa"), Diff(DELETE, "a"), Diff(EQUAL, "a"));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Hitting the end.", diffList(Diff(EQUAL, "xaa"), Diff(DELETE, "a")), diffs);

diffs = diffList(Diff(EQUAL, "The xxx. The "), Diff(INSERT, "zzz. The "), Diff(EQUAL, "yyy."));

dmp.diff_cleanupSemanticLossless(diffs);

assertEquals("diff_cleanupSemantic: Sentence boundaries.", diffList(Diff(EQUAL, "The xxx."), Diff(INSERT, " The zzz."), Diff(EQUAL, " The yyy.")), diffs);

}

void diff_match_patch_test::testDiffCleanupSemantic() {

// Cleanup semantically trivial equalities.

QList<Diff> diffs = diffList();