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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
  Test Harness for diff_match_patch.js and diff_match_patch_uncompressed.js
  Copyright 2018 The diff-match-patch Authors.
  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.
    <script type="text/javascript">
      // Depending on the URL argument, test the compressed or uncompressed version.
      var compressed = (document.location.search == '?compressed');
      if (compressed) {
        document.write('<TITLE>Test harness for diff_match_patch.js</TITLE>');
        document.write('<scr'+'ipt type="text/javascript" src="../diff_match_patch.js"></scr'+'ipt>');
      } else {
        document.write('<TITLE>Test harness for diff_match_patch_uncompressed.js</TITLE>');
        document.write('<scr'+'ipt type="text/javascript" src="../diff_match_patch_uncompressed.js"></scr'+'ipt>');
    </script>
    <script type="text/javascript" src="diff_match_patch_test.js"></script>
    <script type="text/javascript">
      // Counters for unit test results.
      var test_good = 0;
      var test_bad = 0;
      // If expected and actual are the identical, print 'Ok', otherwise 'Fail!'
      function assertEquals(msg, expected, actual) {
        if (typeof actual == 'undefined') {
          // msg is optional.
          actual = expected;
          expected = msg;
          msg = 'Expected: \'' + expected + '\' Actual: \'' + actual + '\'';
        if (expected === actual) {
          document.write('<FONT COLOR="#009900">Ok</FONT><BR>');
          test_good++;
          return true;
        } else {
          document.write('<FONT COLOR="#990000"><BIG>Fail!</BIG></FONT><BR>');
          msg = msg.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
          document.write('<code>' + msg + '</code><BR>');
          test_bad++;
          return false;
      function assertTrue(msg, actual) {
        if (typeof actual == 'undefined') {
          // msg is optional.
          actual = msg;
          return assertEquals(true, actual);
        } else {
          return assertEquals(msg, true, actual);
      function assertFalse(msg, actual) {
        if (typeof actual == 'undefined') {
          // msg is optional.
          actual = msg;
          return assertEquals(false, actual);
        } else {
          return assertEquals(msg, false, actual);
      function runTests() {
        for (var x = 0; x < tests.length; x++) {
          document.write('<H3>' + tests[x] + ':</H3>');
          eval(tests[x] + '()');
      var tests = [
          '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'];
    </script>
    <script type="text/javascript">
      if (compressed) {
        document.write('<H1>Test harness for diff_match_patch.js</H1>');
        document.write('[ Switch to <A HREF="?uncompressed">Uncompressed</A>. ]');
      } else {
        document.write('<H1>Test harness for diff_match_patch_uncompressed.js</H1>');
        document.write('[ Switch to <A HREF="?compressed">Compressed</A>. ]');
    </script>
    <P>If debugging errors, start with the first reported error,
    subsequent tests often rely on earlier ones.</P>
    <script type="text/javascript">
      var startTime = (new Date()).getTime();
      runTests();
      var endTime = (new Date()).getTime();
      document.write('<H3>Done.</H3>');
      document.write('<P>Tests passed: ' + test_good + '<BR>Tests failed: ' + test_bad + '</P>');
      document.write('<P>Total time: ' + (endTime - startTime) + ' ms</P>');
    </script>
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