overleaf/services/document-updater/test/unit/js/HistoryConversionsTests.js

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const _ = require('lodash')
const { expect } = require('chai')
const HistoryConversions = require('../../../app/js/HistoryConversions')
describe('HistoryConversions', function () {
describe('toHistoryRanges', function () {
it('handles empty ranges', function () {
expect(HistoryConversions.toHistoryRanges({})).to.deep.equal({})
})
it("doesn't modify comments when there are no tracked changes", function () {
const ranges = {
comments: [makeComment('comment1', 5, 12)],
}
const historyRanges = HistoryConversions.toHistoryRanges(ranges)
expect(historyRanges).to.deep.equal(ranges)
})
it('adjusts comments and tracked changes to account for tracked deletes', function () {
const comments = [
makeComment('comment0', 0, 1),
makeComment('comment1', 10, 12),
makeComment('comment2', 20, 10),
makeComment('comment3', 15, 3),
]
const changes = [
makeTrackedDelete('change0', 2, 5),
makeTrackedInsert('change1', 4, 5),
makeTrackedDelete('change2', 10, 10),
makeTrackedDelete('change3', 21, 6),
makeTrackedDelete('change4', 50, 7),
]
const ranges = { comments, changes }
const historyRanges = HistoryConversions.toHistoryRanges(ranges)
expect(historyRanges.comments).to.have.deep.members([
comments[0],
// shifted by change0 and change2, extended by change3
enrichOp(comments[1], {
hpos: 25, // 10 + 5 + 10
hlen: 18, // 12 + 6
}),
// shifted by change0 and change2, extended by change3
enrichOp(comments[2], {
hpos: 35, // 20 + 5 + 10
hlen: 16, // 10 + 6
}),
// shifted by change0 and change2
enrichOp(comments[3], {
hpos: 30, // 15 + 5 + 10
}),
])
expect(historyRanges.changes).to.deep.equal([
changes[0],
enrichOp(changes[1], {
hpos: 9, // 4 + 5
}),
enrichOp(changes[2], {
hpos: 15, // 10 + 5
}),
enrichOp(changes[3], {
hpos: 36, // 21 + 5 + 10
}),
enrichOp(changes[4], {
hpos: 71, // 50 + 5 + 10 + 6
}),
])
})
})
})
function makeComment(id, pos, length) {
return {
id,
op: {
c: 'c'.repeat(length),
p: pos,
t: id,
},
metadata: makeMetadata(),
}
}
function makeTrackedInsert(id, pos, length) {
return {
id,
op: {
i: 'i'.repeat(length),
p: pos,
},
metadata: makeMetadata(),
}
}
function makeTrackedDelete(id, pos, length) {
return {
id,
op: {
d: 'd'.repeat(length),
p: pos,
},
metadata: makeMetadata(),
}
}
function makeMetadata() {
return {
user_id: 'user-id',
ts: new Date().toISOString(),
}
}
function enrichOp(commentOrChange, extraFields) {
const result = _.cloneDeep(commentOrChange)
Object.assign(result.op, extraFields)
return result
}