overleaf/services/document-updater/test/unit/js/ShareJS/TextTransformTests.js

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/* eslint-disable
mocha/no-identical-title,
no-return-assign,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
* decaffeinate suggestions:
* DS101: Remove unnecessary use of Array.from
* DS102: Remove unnecessary code created because of implicit returns
* DS202: Simplify dynamic range loops
* DS205: Consider reworking code to avoid use of IIFEs
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
const text = require('../../../../app/js/sharejs/types/text')
const RangesTracker = require('@overleaf/ranges-tracker')
describe('ShareJS text type', function () {
beforeEach(function () {
return (this.t = 'mock-thread-id')
})
describe('transform', function () {
describe('insert / insert', function () {
it('with an insert before', function () {
const dest = []
text._tc(dest, { i: 'foo', p: 9 }, { i: 'bar', p: 3 })
return dest.should.deep.equal([{ i: 'foo', p: 12 }])
})
it('with an insert after', function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { i: 'bar', p: 9 })
return dest.should.deep.equal([{ i: 'foo', p: 3 }])
})
it("with an insert at the same place with side == 'right'", function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { i: 'bar', p: 3 }, 'right')
return dest.should.deep.equal([{ i: 'foo', p: 6 }])
})
return it("with an insert at the same place with side == 'left'", function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { i: 'bar', p: 3 }, 'left')
return dest.should.deep.equal([{ i: 'foo', p: 3 }])
})
})
describe('insert / delete', function () {
it('with a delete before', function () {
const dest = []
text._tc(dest, { i: 'foo', p: 9 }, { d: 'bar', p: 3 })
return dest.should.deep.equal([{ i: 'foo', p: 6 }])
})
it('with a delete after', function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { d: 'bar', p: 9 })
return dest.should.deep.equal([{ i: 'foo', p: 3 }])
})
it("with a delete at the same place with side == 'right'", function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { d: 'bar', p: 3 }, 'right')
return dest.should.deep.equal([{ i: 'foo', p: 3 }])
})
return it("with a delete at the same place with side == 'left'", function () {
const dest = []
text._tc(dest, { i: 'foo', p: 3 }, { d: 'bar', p: 3 }, 'left')
return dest.should.deep.equal([{ i: 'foo', p: 3 }])
})
})
describe('delete / insert', function () {
it('with an insert before', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 9 }, { i: 'bar', p: 3 })
return dest.should.deep.equal([{ d: 'foo', p: 12 }])
})
it('with an insert after', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { i: 'bar', p: 9 })
return dest.should.deep.equal([{ d: 'foo', p: 3 }])
})
it("with an insert at the same place with side == 'right'", function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { i: 'bar', p: 3 }, 'right')
return dest.should.deep.equal([{ d: 'foo', p: 6 }])
})
it("with an insert at the same place with side == 'left'", function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { i: 'bar', p: 3 }, 'left')
return dest.should.deep.equal([{ d: 'foo', p: 6 }])
})
return it('with a delete that overlaps the insert location', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { i: 'bar', p: 4 })
return dest.should.deep.equal([
{ d: 'f', p: 3 },
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{ d: 'oo', p: 6 },
])
})
})
describe('delete / delete', function () {
it('with a delete before', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 9 }, { d: 'bar', p: 3 })
return dest.should.deep.equal([{ d: 'foo', p: 6 }])
})
it('with a delete after', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { d: 'bar', p: 9 })
return dest.should.deep.equal([{ d: 'foo', p: 3 }])
})
it('with deleting the same content', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 3 }, { d: 'foo', p: 3 }, 'right')
return dest.should.deep.equal([])
})
it('with the delete overlapping before', function () {
const dest = []
text._tc(dest, { d: 'foobar', p: 3 }, { d: 'abcfoo', p: 0 }, 'right')
return dest.should.deep.equal([{ d: 'bar', p: 0 }])
})
it('with the delete overlapping after', function () {
const dest = []
text._tc(dest, { d: 'abcfoo', p: 3 }, { d: 'foobar', p: 6 })
return dest.should.deep.equal([{ d: 'abc', p: 3 }])
})
it('with the delete overlapping the whole delete', function () {
const dest = []
text._tc(dest, { d: 'abcfoo123', p: 3 }, { d: 'foo', p: 6 })
return dest.should.deep.equal([{ d: 'abc123', p: 3 }])
})
return it('with the delete inside the whole delete', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 6 }, { d: 'abcfoo123', p: 3 })
return dest.should.deep.equal([])
})
})
describe('comment / insert', function () {
it('with an insert before', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 9, t: this.t }, { i: 'bar', p: 3 })
return dest.should.deep.equal([{ c: 'foo', p: 12, t: this.t }])
})
it('with an insert after', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 3, t: this.t }, { i: 'bar', p: 9 })
return dest.should.deep.equal([{ c: 'foo', p: 3, t: this.t }])
})
it('with an insert at the left edge', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 3, t: this.t }, { i: 'bar', p: 3 })
// RangesTracker doesn't inject inserts into comments on edges, so neither should we
return dest.should.deep.equal([{ c: 'foo', p: 6, t: this.t }])
})
it('with an insert at the right edge', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 3, t: this.t }, { i: 'bar', p: 6 })
// RangesTracker doesn't inject inserts into comments on edges, so neither should we
return dest.should.deep.equal([{ c: 'foo', p: 3, t: this.t }])
})
return it('with an insert in the middle', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 3, t: this.t }, { i: 'bar', p: 5 })
return dest.should.deep.equal([{ c: 'fobaro', p: 3, t: this.t }])
})
})
describe('comment / delete', function () {
it('with a delete before', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 9, t: this.t }, { d: 'bar', p: 3 })
return dest.should.deep.equal([{ c: 'foo', p: 6, t: this.t }])
})
it('with a delete after', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 3, t: this.t }, { i: 'bar', p: 9 })
return dest.should.deep.equal([{ c: 'foo', p: 3, t: this.t }])
})
it('with a delete overlapping the comment content before', function () {
const dest = []
text._tc(dest, { c: 'foobar', p: 6, t: this.t }, { d: '123foo', p: 3 })
return dest.should.deep.equal([{ c: 'bar', p: 3, t: this.t }])
})
it('with a delete overlapping the comment content after', function () {
const dest = []
text._tc(dest, { c: 'foobar', p: 6, t: this.t }, { d: 'bar123', p: 9 })
return dest.should.deep.equal([{ c: 'foo', p: 6, t: this.t }])
})
it('with a delete overlapping the comment content in the middle', function () {
const dest = []
text._tc(dest, { c: 'foo123bar', p: 6, t: this.t }, { d: '123', p: 9 })
return dest.should.deep.equal([{ c: 'foobar', p: 6, t: this.t }])
})
return it('with a delete overlapping the whole comment', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 6, t: this.t }, { d: '123foo456', p: 3 })
return dest.should.deep.equal([{ c: '', p: 3, t: this.t }])
})
})
describe('comment / insert', function () {
return it('should not do anything', function () {
const dest = []
text._tc(dest, { i: 'foo', p: 6 }, { c: 'bar', p: 3 })
return dest.should.deep.equal([{ i: 'foo', p: 6 }])
})
})
describe('comment / delete', function () {
return it('should not do anything', function () {
const dest = []
text._tc(dest, { d: 'foo', p: 6 }, { c: 'bar', p: 3 })
return dest.should.deep.equal([{ d: 'foo', p: 6 }])
})
})
return describe('comment / comment', function () {
return it('should not do anything', function () {
const dest = []
text._tc(dest, { c: 'foo', p: 6 }, { c: 'bar', p: 3 })
return dest.should.deep.equal([{ c: 'foo', p: 6 }])
})
})
})
describe('apply', function () {
it('should apply an insert', function () {
return text.apply('foo', [{ i: 'bar', p: 2 }]).should.equal('fobaro')
})
it('should apply a delete', function () {
return text
.apply('foo123bar', [{ d: '123', p: 3 }])
.should.equal('foobar')
})
it('should do nothing with a comment', function () {
return text
.apply('foo123bar', [{ c: '123', p: 3 }])
.should.equal('foo123bar')
})
it('should throw an error when deleted content does not match', function () {
return (() => text.apply('foo123bar', [{ d: '456', p: 3 }])).should.throw(
Error
)
})
return it('should throw an error when comment content does not match', function () {
return (() => text.apply('foo123bar', [{ c: '456', p: 3 }])).should.throw(
Error
)
})
})
return describe('applying ops and comments in different orders', function () {
return it('should not matter which op or comment is applied first', function () {
let length, p
let asc, end
let asc1, end1
let asc3, end3
const transform = function (op1, op2, side) {
const d = []
text._tc(d, op1, op2, side)
return d
}
const applySnapshot = (snapshot, op) => text.apply(snapshot, op)
const applyRanges = function (rangesTracker, ops) {
for (const op of Array.from(ops)) {
rangesTracker.applyOp(op, {})
}
return rangesTracker
}
const commentsEqual = function (comments1, comments2) {
if (comments1.length !== comments2.length) {
return false
}
comments1.sort((a, b) => {
if (a.offset - b.offset === 0) {
return a.length - b.length
} else {
return a.offset - b.offset
}
})
comments2.sort((a, b) => {
if (a.offset - b.offset === 0) {
return a.length - b.length
} else {
return a.offset - b.offset
}
})
for (let i = 0; i < comments1.length; i++) {
const comment1 = comments1[i]
const comment2 = comments2[i]
if (
comment1.offset !== comment2.offset ||
comment1.length !== comment2.length
) {
return false
}
}
return true
}
const SNAPSHOT = '123'
const OPS = []
// Insert ops
for (
p = 0, end = SNAPSHOT.length, asc = end >= 0;
asc ? p <= end : p >= end;
asc ? p++ : p--
) {
OPS.push({ i: 'a', p })
OPS.push({ i: 'bc', p })
}
for (
p = 0, end1 = SNAPSHOT.length - 1, asc1 = end1 >= 0;
asc1 ? p <= end1 : p >= end1;
asc1 ? p++ : p--
) {
let asc2, end2
for (
length = 1, end2 = SNAPSHOT.length - p, asc2 = end2 >= 1;
asc2 ? length <= end2 : length >= end2;
asc2 ? length++ : length--
) {
OPS.push({ d: SNAPSHOT.slice(p, p + length), p })
}
}
for (
p = 0, end3 = SNAPSHOT.length - 1, asc3 = end3 >= 0;
asc3 ? p <= end3 : p >= end3;
asc3 ? p++ : p--
) {
let asc4, end4
for (
length = 1, end4 = SNAPSHOT.length - p, asc4 = end4 >= 1;
asc4 ? length <= end4 : length >= end4;
asc4 ? length++ : length--
) {
OPS.push({ c: SNAPSHOT.slice(p, p + length), p, t: this.t })
}
}
return (() => {
const result = []
for (const op1 of Array.from(OPS)) {
result.push(
(() => {
const result1 = []
for (const op2 of Array.from(OPS)) {
const op1T = transform(op1, op2, 'left')
const op2T = transform(op2, op1, 'right')
const rt12 = new RangesTracker()
const snapshot12 = applySnapshot(
applySnapshot(SNAPSHOT, [op1]),
op2T
)
applyRanges(rt12, [op1])
applyRanges(rt12, op2T)
const rt21 = new RangesTracker()
const snapshot21 = applySnapshot(
applySnapshot(SNAPSHOT, [op2]),
op1T
)
applyRanges(rt21, [op2])
applyRanges(rt21, op1T)
if (snapshot12 !== snapshot21) {
console.error(
{
op1,
op2,
op1T,
op2T,
snapshot12,
snapshot21,
},
'Ops are not consistent'
)
throw new Error('OT is inconsistent')
}
if (!commentsEqual(rt12.comments, rt21.comments)) {
console.log(rt12.comments)
console.log(rt21.comments)
console.error(
{
op1,
op2,
op1T,
op2T,
rt12_comments: rt12.comments,
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rt21_comments: rt21.comments,
},
'Comments are not consistent'
)
throw new Error('OT is inconsistent')
} else {
result1.push(undefined)
}
}
return result1
})()
)
}
return result
})()
})
})
})