easysync tests: Split into multiple files

src/tests/frontend/easysync-helper.js

@@ -0,0 +1,222 @@
+'use strict';
+
+const Changeset = require('../../static/js/Changeset');
+const AttributePool = require('../../static/js/AttributePool');
+
+const randInt = (maxValue) => Math.floor(Math.random() * maxValue);
+
+const poolOrArray = (attribs) => {
+  if (attribs.getAttrib) {
+    return attribs; // it's already an attrib pool
+  } else {
+    // assume it's an array of attrib strings to be split and added
+    const p = new AttributePool();
+    attribs.forEach((kv) => {
+      p.putAttrib(kv.split(','));
+    });
+    return p;
+  }
+};
+exports.poolOrArray = poolOrArray;
+
+const randomInlineString = (len) => {
+  const assem = Changeset.stringAssembler();
+  for (let i = 0; i < len; i++) {
+    assem.append(String.fromCharCode(randInt(26) + 97));
+  }
+  return assem.toString();
+};
+
+const randomMultiline = (approxMaxLines, approxMaxCols) => {
+  const numParts = randInt(approxMaxLines * 2) + 1;
+  const txt = Changeset.stringAssembler();
+  txt.append(randInt(2) ? '\n' : '');
+  for (let i = 0; i < numParts; i++) {
+    if ((i % 2) === 0) {
+      if (randInt(10)) {
+        txt.append(randomInlineString(randInt(approxMaxCols) + 1));
+      } else {
+        txt.append('\n');
+      }
+    } else {
+      txt.append('\n');
+    }
+  }
+  return txt.toString();
+};
+exports.randomMultiline = randomMultiline;
+
+const randomStringOperation = (numCharsLeft) => {
+  let result;
+  switch (randInt(9)) {
+    case 0:
+    {
+      // insert char
+      result = {
+        insert: randomInlineString(1),
+      };
+      break;
+    }
+    case 1:
+    {
+      // delete char
+      result = {
+        remove: 1,
+      };
+      break;
+    }
+    case 2:
+    {
+      // skip char
+      result = {
+        skip: 1,
+      };
+      break;
+    }
+    case 3:
+    {
+      // insert small
+      result = {
+        insert: randomInlineString(randInt(4) + 1),
+      };
+      break;
+    }
+    case 4:
+    {
+      // delete small
+      result = {
+        remove: randInt(4) + 1,
+      };
+      break;
+    }
+    case 5:
+    {
+      // skip small
+      result = {
+        skip: randInt(4) + 1,
+      };
+      break;
+    }
+    case 6:
+    {
+      // insert multiline;
+      result = {
+        insert: randomMultiline(5, 20),
+      };
+      break;
+    }
+    case 7:
+    {
+      // delete multiline
+      result = {
+        remove: Math.round(numCharsLeft * Math.random() * Math.random()),
+      };
+      break;
+    }
+    case 8:
+    {
+      // skip multiline
+      result = {
+        skip: Math.round(numCharsLeft * Math.random() * Math.random()),
+      };
+      break;
+    }
+    case 9:
+    {
+      // delete to end
+      result = {
+        remove: numCharsLeft,
+      };
+      break;
+    }
+    case 10:
+    {
+      // skip to end
+      result = {
+        skip: numCharsLeft,
+      };
+      break;
+    }
+  }
+  const maxOrig = numCharsLeft - 1;
+  if ('remove' in result) {
+    result.remove = Math.min(result.remove, maxOrig);
+  } else if ('skip' in result) {
+    result.skip = Math.min(result.skip, maxOrig);
+  }
+  return result;
+};
+
+const randomTwoPropAttribs = (opcode) => {
+  // assumes attrib pool like ['apple,','apple,true','banana,','banana,true']
+  if (opcode === '-' || randInt(3)) {
+    return '';
+  } else if (randInt(3)) { // eslint-disable-line no-dupe-else-if
+    if (opcode === '+' || randInt(2)) {
+      return `*${Changeset.numToString(randInt(2) * 2 + 1)}`;
+    } else {
+      return `*${Changeset.numToString(randInt(2) * 2)}`;
+    }
+  } else if (opcode === '+' || randInt(4) === 0) {
+    return '*1*3';
+  } else {
+    return ['*0*2', '*0*3', '*1*2'][randInt(3)];
+  }
+};
+
+const randomTestChangeset = (origText, withAttribs) => {
+  const charBank = Changeset.stringAssembler();
+  let textLeft = origText; // always keep final newline
+  const outTextAssem = Changeset.stringAssembler();
+  const opAssem = Changeset.smartOpAssembler();
+  const oldLen = origText.length;
+
+  const nextOp = new Changeset.Op();
+
+  const appendMultilineOp = (opcode, txt) => {
+    nextOp.opcode = opcode;
+    if (withAttribs) {
+      nextOp.attribs = randomTwoPropAttribs(opcode);
+    }
+    txt.replace(/\n|[^\n]+/g, (t) => {
+      if (t === '\n') {
+        nextOp.chars = 1;
+        nextOp.lines = 1;
+        opAssem.append(nextOp);
+      } else {
+        nextOp.chars = t.length;
+        nextOp.lines = 0;
+        opAssem.append(nextOp);
+      }
+      return '';
+    });
+  };
+
+  const doOp = () => {
+    const o = randomStringOperation(textLeft.length);
+    if (o.insert) {
+      const txt = o.insert;
+      charBank.append(txt);
+      outTextAssem.append(txt);
+      appendMultilineOp('+', txt);
+    } else if (o.skip) {
+      const txt = textLeft.substring(0, o.skip);
+      textLeft = textLeft.substring(o.skip);
+      outTextAssem.append(txt);
+      appendMultilineOp('=', txt);
+    } else if (o.remove) {
+      const txt = textLeft.substring(0, o.remove);
+      textLeft = textLeft.substring(o.remove);
+      appendMultilineOp('-', txt);
+    }
+  };
+
+  while (textLeft.length > 1) doOp();
+  for (let i = 0; i < 5; i++) doOp(); // do some more (only insertions will happen)
+  const outText = `${outTextAssem.toString()}\n`;
+  opAssem.endDocument();
+  const cs = Changeset.pack(oldLen, outText.length, opAssem.toString(), charBank.toString());
+  Changeset.checkRep(cs);
+  return [cs, outText];
+};
+exports.randomTestChangeset = randomTestChangeset;

src/tests/frontend/specs/easysync-assembler.js

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+'use strict';
+
+const Changeset = require('../../../static/js/Changeset');
+
+describe('easysync-assembler', function () {
+  it('opAssembler', async function () {
+    const x = '-c*3*4+6|3=az*asdf0*1*2*3+1=1-1+1*0+1=1-1+1|c=c-1';
+    const assem = Changeset.opAssembler();
+    for (const op of Changeset.deserializeOps(x)) assem.append(op);
+    expect(assem.toString()).to.equal(x);
+  });
+
+  it('smartOpAssembler', async function () {
+    const x = '-c*3*4+6|3=az*asdf0*1*2*3+1=1-1+1*0+1=1-1+1|c=c-1';
+    const assem = Changeset.smartOpAssembler();
+    for (const op of Changeset.deserializeOps(x)) assem.append(op);
+    assem.endDocument();
+    expect(assem.toString()).to.equal(x);
+  });
+
+  describe('append atext to assembler', function () {
+    const testAppendATextToAssembler = (testId, atext, correctOps) => {
+      it(`testAppendATextToAssembler#${testId}`, async function () {
+        const assem = Changeset.smartOpAssembler();
+        for (const op of Changeset.opsFromAText(atext)) assem.append(op);
+        expect(assem.toString()).to.equal(correctOps);
+      });
+    };
+
+    testAppendATextToAssembler(1, {
+      text: '\n',
+      attribs: '|1+1',
+    }, '');
+    testAppendATextToAssembler(2, {
+      text: '\n\n',
+      attribs: '|2+2',
+    }, '|1+1');
+    testAppendATextToAssembler(3, {
+      text: '\n\n',
+      attribs: '*x|2+2',
+    }, '*x|1+1');
+    testAppendATextToAssembler(4, {
+      text: '\n\n',
+      attribs: '*x|1+1|1+1',
+    }, '*x|1+1');
+    testAppendATextToAssembler(5, {
+      text: 'foo\n',
+      attribs: '|1+4',
+    }, '+3');
+    testAppendATextToAssembler(6, {
+      text: '\nfoo\n',
+      attribs: '|2+5',
+    }, '|1+1+3');
+    testAppendATextToAssembler(7, {
+      text: '\nfoo\n',
+      attribs: '*x|2+5',
+    }, '*x|1+1*x+3');
+    testAppendATextToAssembler(8, {
+      text: '\n\n\nfoo\n',
+      attribs: '|2+2*x|2+5',
+    }, '|2+2*x|1+1*x+3');
+  });
+});

src/tests/frontend/specs/easysync-compose.js

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+'use strict';
+
+const Changeset = require('../../../static/js/Changeset');
+const AttributePool = require('../../../static/js/AttributePool');
+const {randomMultiline, randomTestChangeset} = require('../easysync-helper.js');
+
+describe('easysync-compose', function () {
+  describe('compose', function () {
+    const testCompose = (randomSeed) => {
+      it(`testCompose#${randomSeed}`, async function () {
+        const p = new AttributePool();
+
+        const startText = `${randomMultiline(10, 20)}\n`;
+
+        const x1 = randomTestChangeset(startText);
+        const change1 = x1[0];
+        const text1 = x1[1];
+
+        const x2 = randomTestChangeset(text1);
+        const change2 = x2[0];
+        const text2 = x2[1];
+
+        const x3 = randomTestChangeset(text2);
+        const change3 = x3[0];
+        const text3 = x3[1];
+
+        const change12 = Changeset.checkRep(Changeset.compose(change1, change2, p));
+        const change23 = Changeset.checkRep(Changeset.compose(change2, change3, p));
+        const change123 = Changeset.checkRep(Changeset.compose(change12, change3, p));
+        const change123a = Changeset.checkRep(Changeset.compose(change1, change23, p));
+        expect(change123a).to.equal(change123);
+
+        expect(Changeset.applyToText(change12, startText)).to.equal(text2);
+        expect(Changeset.applyToText(change23, text1)).to.equal(text3);
+        expect(Changeset.applyToText(change123, startText)).to.equal(text3);
+      });
+    };
+
+    for (let i = 0; i < 30; i++) testCompose(i);
+  });
+
+  describe('compose attributes', function () {
+    it('simpleComposeAttributesTest', async function () {
+      const p = new AttributePool();
+      p.putAttrib(['bold', '']);
+      p.putAttrib(['bold', 'true']);
+      const cs1 = Changeset.checkRep('Z:2>1*1+1*1=1$x');
+      const cs2 = Changeset.checkRep('Z:3>0*0|1=3$');
+      const cs12 = Changeset.checkRep(Changeset.compose(cs1, cs2, p));
+      expect(cs12).to.equal('Z:2>1+1*0|1=2$x');
+    });
+  });
+});