lock compile directory

test/unit/coffee/LockManager.coffee

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+SandboxedModule = require('sandboxed-module')
+sinon = require('sinon')
+require('chai').should()
+modulePath = require('path').join __dirname, '../../../app/js/LockManager'
+Path = require "path"
+Errors = require "../../../app/js/Errors"
+
+describe "LockManager", ->
+	beforeEach ->
+		@LockManager = SandboxedModule.require modulePath, requires:
+			"settings-sharelatex": {}
+			"logger-sharelatex": @logger = { log: sinon.stub(), error: sinon.stub() }
+			"lockfile": @Lockfile = {}
+		@lockFile = "/local/compile/directory/.project-lock"
+
+	describe "runWithLock", ->
+		beforeEach ->
+			@runner = sinon.stub().callsArgWith(0, null, "foo", "bar")
+			@callback = sinon.stub()
+
+		describe "normally", ->
+			beforeEach ->
+				@Lockfile.lock = sinon.stub().callsArgWith(2, null)
+				@Lockfile.unlock = sinon.stub().callsArgWith(1, null)
+				@LockManager.runWithLock @lockFile, @runner, @callback
+
+			it "should run the compile", ->
+				@runner
+					.calledWith()
+					.should.equal true
+
+			it "should call the callback with the response from the compile", ->
+				@callback
+					.calledWithExactly(null, "foo", "bar")
+					.should.equal true
+
+		describe "when the project is locked", ->
+			beforeEach ->
+				@error = new Error()
+				@error.code =  "EEXIST"
+				@Lockfile.lock = sinon.stub().callsArgWith(2,@error)
+				@Lockfile.unlock = sinon.stub().callsArgWith(1, null)
+				@LockManager.runWithLock @lockFile, @runner, @callback
+
+			it "should not run the compile", ->
+				@runner
+					.called
+					.should.equal false
+
+			it "should return an error", ->
+				error = new Errors.AlreadyCompilingError()
+				@callback
+					.calledWithExactly(error)
+					.should.equal true