overleaf/services/track-changes/test/unit/coffee/HistoryManager/HistoryManagerTests.coffee

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sinon = require('sinon')
chai = require('chai')
should = chai.should()
expect = chai.expect
modulePath = "../../../../app/js/HistoryManager.js"
SandboxedModule = require('sandboxed-module')
describe "HistoryManager", ->
beforeEach ->
@HistoryManager = SandboxedModule.require modulePath, requires:
"./UpdateCompressor": @UpdateCompressor = {}
"./MongoManager" : @MongoManager = {}
"logger-sharelatex": { log: sinon.stub() }
@doc_id = "doc-id-123"
@callback = sinon.stub()
describe "when there are no raw ops", ->
beforeEach ->
@MongoManager.popLastCompressedUpdate = sinon.stub()
@MongoManager.insertCompressedUpdates = sinon.stub()
@HistoryManager.compressAndSaveRawUpdates @doc_id, [], @callback
it "should not need to access the database", ->
@MongoManager.popLastCompressedUpdate.called.should.equal false
@MongoManager.insertCompressedUpdates.called.should.equal false
it "should call the callback", ->
@callback.called.should.equal true
describe "when there is no compressed history to begin with", ->
beforeEach ->
@rawUpdates = ["mock-raw-op-1", "mock-raw-op-2"]
@compressedUpdates = ["mock-compressed-op"]
@MongoManager.popLastCompressedUpdate = sinon.stub().callsArgWith(1, null, null)
@MongoManager.insertCompressedUpdates = sinon.stub().callsArg(2)
@UpdateCompressor.compressRawUpdates = sinon.stub().returns(@compressedUpdates)
@HistoryManager.compressAndSaveRawUpdates @doc_id, @rawUpdates, @callback
it "should try to pop the last compressed op", ->
@MongoManager.popLastCompressedUpdate
.calledWith(@doc_id)
.should.equal true
it "should compress the raw ops", ->
@UpdateCompressor.compressRawUpdates
.calledWith(null, @rawUpdates)
.should.equal true
it "should save the compressed ops", ->
@MongoManager.insertCompressedUpdates
.calledWith(@doc_id, @compressedUpdates)
.should.equal true
it "should call the callback", ->
@callback.called.should.equal true
describe "when the raw ops need appending to existing history", ->
beforeEach ->
@rawUpdates = ["mock-raw-op-1", "mock-raw-op-2"]
@lastCompressedUpdate = "mock-last-compressed-op-0"
@compressedUpdates = ["mock-compressed-op-1"]
@MongoManager.popLastCompressedUpdate = sinon.stub().callsArgWith(1, null, @lastCompressedUpdate)
@MongoManager.insertCompressedUpdates = sinon.stub().callsArg(2)
@UpdateCompressor.compressRawUpdates = sinon.stub().returns(@compressedUpdates)
@HistoryManager.compressAndSaveRawUpdates @doc_id, @rawUpdates, @callback
it "should try to pop the last compressed op", ->
@MongoManager.popLastCompressedUpdate
.calledWith(@doc_id)
.should.equal true
it "should compress the last compressed op and the raw ops", ->
@UpdateCompressor.compressRawUpdates
.calledWith(@lastCompressedUpdate, @rawUpdates)
.should.equal true
it "should save the compressed ops", ->
@MongoManager.insertCompressedUpdates
.calledWith(@doc_id, @compressedUpdates)
.should.equal true
it "should call the callback", ->
@callback.called.should.equal true