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first version after migration to mocha
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webzwo0i
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13 changed files with 1222 additions and 1613 deletions
279
tests/backend/specs/easysync/inverserandom.js
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279
tests/backend/specs/easysync/inverserandom.js
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var Changeset = require("ep_etherpad-lite/static/js/Changeset");
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var AttributePool = require("ep_etherpad-lite/static/js/AttributePool");
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var helper = require("./helper.js")
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var assertEqualStrings = helper.assertEqualStrings;
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var assertEqualArrays = helper.assertEqualArrays;
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var assert = helper.assert;
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describe("inverseRandom",function(){
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it("inverseRandom",function(done){
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for (var i = 0; i < 30; i++) testInverseRandom(i);
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done();
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})
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})
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function testInverseRandom(randomSeed) {
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var rand = new random();
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var p = poolOrArray(['apple,', 'apple,true', 'banana,', 'banana,true']);
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var startText = randomMultiline(10, 20, rand) + '\n';
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var alines = Changeset.splitAttributionLines(Changeset.makeAttribution(startText), startText);
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var lines = startText.slice(0, -1).split('\n').map(function (s) {
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return s + '\n';
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});
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var stylifier = randomTestChangeset(startText, rand, true)[0];
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//print(alines.join('\n'));
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Changeset.mutateAttributionLines(stylifier, alines, p);
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//print(stylifier);
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//print(alines.join('\n'));
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Changeset.mutateTextLines(stylifier, lines);
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var changeset = randomTestChangeset(lines.join(''), rand, true)[0];
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var inverseChangeset = Changeset.inverse(changeset, lines, alines, p);
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var origLines = lines.slice();
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var origALines = alines.slice();
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Changeset.mutateTextLines(changeset, lines);
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Changeset.mutateAttributionLines(changeset, alines, p);
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//print(origALines.join('\n'));
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//print(changeset);
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//print(inverseChangeset);
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//print(origLines.map(function(s) { return '1: '+s.slice(0,-1); }).join('\n'));
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//print(lines.map(function(s) { return '2: '+s.slice(0,-1); }).join('\n'));
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//print(alines.join('\n'));
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Changeset.mutateTextLines(inverseChangeset, lines);
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Changeset.mutateAttributionLines(inverseChangeset, alines, p);
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//print(lines.map(function(s) { return '3: '+s.slice(0,-1); }).join('\n'));
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assertEqualArrays(origLines, lines);
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assertEqualArrays(origALines, alines);
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}
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function random() {
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this.nextInt = function (maxValue) {
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return Math.floor(Math.random() * maxValue);
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}
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// maxValue is not used
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this.nextDouble = function (maxValue) {
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return Math.random();
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}
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}
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function poolOrArray(attribs) {
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if (attribs.getAttrib) {
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return attribs; // it's already an attrib pool
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} else {
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// assume it's an array of attrib strings to be split and added
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var p = new AttributePool();
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attribs.forEach(function (kv) {
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p.putAttrib(kv.split(','));
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});
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return p;
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}
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}
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function randomMultiline(approxMaxLines, approxMaxCols, rand) {
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var numParts = rand.nextInt(approxMaxLines * 2) + 1;
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var txt = Changeset.stringAssembler();
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txt.append(rand.nextInt(2) ? '\n' : '');
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for (var i = 0; i < numParts; i++) {
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if ((i % 2) == 0) {
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if (rand.nextInt(10)) {
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txt.append(randomInlineString(rand.nextInt(approxMaxCols) + 1, rand));
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} else {
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txt.append('\n');
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}
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} else {
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txt.append('\n');
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}
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}
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return txt.toString();
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}
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function randomInlineString(len, rand) {
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var assem = Changeset.stringAssembler();
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for (var i = 0; i < len; i++) {
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assem.append(String.fromCharCode(rand.nextInt(26) + 97));
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}
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return assem.toString();
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}
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function randomTestChangeset(origText, rand, withAttribs) {
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var charBank = Changeset.stringAssembler();
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var textLeft = origText; // always keep final newline
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var outTextAssem = Changeset.stringAssembler();
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var opAssem = Changeset.smartOpAssembler();
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var oldLen = origText.length;
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var nextOp = Changeset.newOp();
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function appendMultilineOp(opcode, txt) {
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nextOp.opcode = opcode;
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if (withAttribs) {
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nextOp.attribs = randomTwoPropAttribs(opcode, rand);
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}
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txt.replace(/\n|[^\n]+/g, function (t) {
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if (t == '\n') {
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nextOp.chars = 1;
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nextOp.lines = 1;
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opAssem.append(nextOp);
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} else {
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nextOp.chars = t.length;
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nextOp.lines = 0;
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opAssem.append(nextOp);
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}
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return '';
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});
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}
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function doOp() {
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var o = randomStringOperation(textLeft.length, rand);
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if (o.insert) {
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var txt = o.insert;
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charBank.append(txt);
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outTextAssem.append(txt);
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appendMultilineOp('+', txt);
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} else if (o.skip) {
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var txt = textLeft.substring(0, o.skip);
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textLeft = textLeft.substring(o.skip);
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outTextAssem.append(txt);
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appendMultilineOp('=', txt);
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} else if (o.remove) {
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var txt = textLeft.substring(0, o.remove);
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textLeft = textLeft.substring(o.remove);
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appendMultilineOp('-', txt);
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}
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}
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while (textLeft.length > 1) doOp();
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for (var i = 0; i < 5; i++) doOp(); // do some more (only insertions will happen)
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var outText = outTextAssem.toString() + '\n';
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opAssem.endDocument();
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var cs = Changeset.pack(oldLen, outText.length, opAssem.toString(), charBank.toString());
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Changeset.checkRep(cs);
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return [cs, outText];
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}
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function randomStringOperation(numCharsLeft, rand) {
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var result;
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switch (rand.nextInt(9)) {
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case 0:
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{
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// insert char
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result = {
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insert: randomInlineString(1, rand)
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};
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break;
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}
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case 1:
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{
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// delete char
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result = {
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remove: 1
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};
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break;
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}
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case 2:
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{
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// skip char
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result = {
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skip: 1
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};
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break;
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}
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case 3:
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{
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// insert small
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result = {
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insert: randomInlineString(rand.nextInt(4) + 1, rand)
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};
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break;
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}
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case 4:
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{
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// delete small
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result = {
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remove: rand.nextInt(4) + 1
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};
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break;
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}
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case 5:
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{
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// skip small
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result = {
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skip: rand.nextInt(4) + 1
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};
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break;
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}
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case 6:
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{
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// insert multiline;
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result = {
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insert: randomMultiline(5, 20, rand)
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};
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break;
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}
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case 7:
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{
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// delete multiline
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result = {
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remove: Math.round(numCharsLeft * rand.nextDouble() * rand.nextDouble())
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};
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break;
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}
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case 8:
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{
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// skip multiline
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result = {
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skip: Math.round(numCharsLeft * rand.nextDouble() * rand.nextDouble())
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};
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break;
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}
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case 9:
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{
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// delete to end
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result = {
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remove: numCharsLeft
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};
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break;
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}
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case 10:
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{
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// skip to end
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result = {
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skip: numCharsLeft
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};
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break;
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}
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}
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var maxOrig = numCharsLeft - 1;
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if ('remove' in result) {
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result.remove = Math.min(result.remove, maxOrig);
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} else if ('skip' in result) {
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result.skip = Math.min(result.skip, maxOrig);
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}
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return result;
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}
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function randomTwoPropAttribs(opcode, rand) {
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// assumes attrib pool like ['apple,','apple,true','banana,','banana,true']
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if (opcode == '-' || rand.nextInt(3)) {
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return '';
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// always true
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} else if (rand.nextInt(3)) {
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if (opcode == '+' || rand.nextInt(2)) {
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return '*' + Changeset.numToString(rand.nextInt(2) * 2 + 1);
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} else {
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return '*' + Changeset.numToString(rand.nextInt(2) * 2);
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}
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} else {
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if (opcode == '+' || rand.nextInt(4) == 0) {
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return '*1*3';
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} else {
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return ['*0*2', '*0*3', '*1*2'][rand.nextInt(3)];
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}
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}
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}
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function assertEqualArrays(a, b) {
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assert("JSON.stringify(" + literal(a) + ") == JSON.stringify(" + literal(b) + ")");
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}
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