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110 lines
3.4 KiB
CoffeeScript
110 lines
3.4 KiB
CoffeeScript
sinon = require('sinon')
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chai = require('chai')
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should = chai.should()
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path = require('path')
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modulePath = path.join __dirname, '../../../../../app/js/infrastructure/LockManager.js'
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SandboxedModule = require('sandboxed-module')
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describe 'LockManager - getting the lock', ->
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beforeEach ->
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@LockManager = SandboxedModule.require modulePath, requires:
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"logger-sharelatex": log:->
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"./RedisWrapper":
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client: ()->
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auth:->
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"settings-sharelatex":{redis:{}}
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"metrics-sharelatex":
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inc:->
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gauge:->
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@callback = sinon.stub()
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@key = "lock:web:lockName:project-id}"
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@namespace = 'lockName'
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describe "when the lock is not set", ->
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beforeEach (done) ->
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@LockManager._tryLock = sinon.stub().yields(null, true)
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@LockManager._getLock @key, @namespace, (args...) =>
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@callback(args...)
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done()
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it "should try to get the lock", ->
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@LockManager._tryLock
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.calledWith(@key, @namespace)
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.should.equal true
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it "should only need to try once", ->
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@LockManager._tryLock.callCount.should.equal 1
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it "should return the callback", ->
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@callback.calledWith(null).should.equal true
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describe "when the lock is initially set", ->
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beforeEach (done) ->
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startTime = Date.now()
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tries = 0
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@LockManager.LOCK_TEST_INTERVAL = 5
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@LockManager._tryLock = (key, namespace, callback = (error, isFree) ->) ->
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if (Date.now() - startTime < 20) or (tries < 2)
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tries = tries + 1
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callback null, false
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else
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callback null, true
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sinon.spy @LockManager, "_tryLock"
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@LockManager._getLock @key, @namespace, (args...) =>
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@callback(args...)
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done()
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it "should call tryLock multiple times until free", ->
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(@LockManager._tryLock.callCount > 1).should.equal true
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it "should return the callback", ->
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@callback.calledWith(null).should.equal true
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describe "when the lock times out", ->
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beforeEach (done) ->
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time = Date.now()
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@LockManager.MAX_LOCK_WAIT_TIME = 5
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@LockManager._tryLock = sinon.stub().yields(null, false)
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@LockManager._getLock @key, @namespace, (args...) =>
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@callback(args...)
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done()
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it "should return the callback with an error", ->
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@callback.calledWith(new Error("timeout")).should.equal true
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describe "when there are multiple requests for the same lock", ->
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beforeEach (done) ->
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locked = false
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@results = []
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@LockManager.LOCK_TEST_INTERVAL = 1
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@LockManager._tryLock = (key, namespace, callback = (error, gotLock, lockValue) ->) ->
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if locked
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callback null, false
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else
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locked = true # simulate getting the lock
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callback null, true
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# Start ten lock requests in order at 1ms 2ms 3ms...
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# with them randomly holding the lock for 0-100ms.
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# Use predefined values for the random delay to make the test
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# deterministic.
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randomDelays = [52, 45, 41, 84, 60, 81, 31, 46, 9, 43 ]
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startTime = 0
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for randomDelay, i in randomDelays
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do (randomDelay, i) =>
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startTime += 1
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setTimeout () =>
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# changing the next line to the old method of LockManager._getLockByPolling
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# should give results in a random order and cause the test to fail.
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@LockManager._getLock @key, @namespace, (args...) =>
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setTimeout () ->
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locked = false # release the lock after a random amount of time
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, randomDelay
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@results.push i
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if @results.length is 10
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done()
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, startTime
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it "should process the requests in order", ->
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@results.should.deep.equal [0,1,2,3,4,5,6,7,8,9]
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