Add project export acceptance tests

- Add acceptance tests
- Add `MockV1Api` helper
- Add flush endpoint to `MockProjectHistoryApi` helper

services/web/test/acceptance/coffee/ExportsTests.coffee

@@ -0,0 +1,56 @@
+expect = require('chai').expect
+request = require './helpers/request'
+_ = require 'underscore'
+
+
+User = require './helpers/User'
+ProjectGetter = require '../../../app/js/Features/Project/ProjectGetter.js'
+ExportsHandler = require '../../../app/js/Features/Exports/ExportsHandler.js'
+
+MockProjectHistoryApi = require './helpers/MockProjectHistoryApi'
+MockV1Api = require './helpers/MockV1Api'
+
+describe 'Exports', ->
+	before (done) ->
+		@brand_variation_id = '18'
+		@owner = new User()
+		@owner.login (error) =>
+			throw error if error?
+			@owner.createProject 'example-project', {template: 'example'}, (error, @project_id) =>
+				throw error if error?
+				done()
+
+	describe 'exporting a project', ->
+		beforeEach (done) ->
+			@version = Math.floor(Math.random() * 10000)
+			MockProjectHistoryApi.setProjectVersion(@project_id, @version)
+			@export_id = Math.floor(Math.random() * 10000)
+			MockV1Api.setExportId(@export_id)
+			MockV1Api.clearExportParams()
+			@owner.request {
+				method: 'POST',
+				url: "/project/#{@project_id}/export/#{@brand_variation_id}",
+				json: {},
+			}, (error, response, body) =>
+				throw error if error?
+				expect(response.statusCode).to.equal 200
+				@exportResponseBody = body
+				done()
+
+		it 'should have sent correct data to v1', (done) ->
+			{project, user, destination, options} = MockV1Api.getLastExportParams()
+			# project details should match
+			expect(project.id).to.equal @project_id
+			expect(project.rootDocPath).to.equal '/main.tex'
+			# version should match what was retrieved from project-history
+			expect(project.historyVersion).to.equal @version
+			# user details should match
+			expect(user.id).to.equal @owner.id
+			expect(user.email).to.equal @owner.email
+			# brand-variation should match
+			expect(destination.brandVariationId).to.equal @brand_variation_id
+			done()
+
+		it 'should have returned the export ID provided by v1', (done) ->
+			expect(@exportResponseBody.export_v1_id).to.equal @export_id
+			done()

services/web/test/acceptance/coffee/helpers/MockProjectHistoryApi.coffee

@@ -6,9 +6,14 @@ module.exports = MockProjectHistoryApi =
 
 	oldFiles: {}
 
+	projectVersions: {}
+
 	addOldFile: (project_id, version, pathname, content) ->
 		@oldFiles["#{project_id}:#{version}:#{pathname}"] = content
 
+	setProjectVersion: (project_id, version) ->
+		@projectVersions[project_id] = version
+
 	run: () ->
 		app.post "/project", (req, res, next) =>
 			res.json project: id: 1
@@ -21,6 +26,13 @@ module.exports = MockProjectHistoryApi =
 			else
 				res.send 404
 
+		app.get "/project/:project_id/version", (req, res, next) =>
+			{project_id} = req.params
+			if @projectVersions[project_id]?
+				res.json version: @projectVersions[project_id]
+			else
+				res.send 404
+
 		app.listen 3054, (error) ->
 			throw error if error?
 		.on "error", (error) ->

services/web/test/acceptance/coffee/helpers/MockV1Api.coffee

@@ -0,0 +1,34 @@
+express = require("express")
+app = express()
+bodyParser = require('body-parser')
+
+app.use(bodyParser.json())
+
+module.exports = MockV1Api =
+
+	exportId: null
+
+	exportParams: null
+
+	setExportId: (id) ->
+		@exportId = id
+
+	getLastExportParams: () ->
+		@exportParams
+
+	clearExportParams: () ->
+		@exportParams = null
+
+	run: () ->
+		app.post "/api/v1/sharelatex/exports", (req, res, next) =>
+			#{project, version, pathname}
+			@exportParams = Object.assign({}, req.body)
+			res.json exportId: @exportId
+
+		app.listen 5000, (error) ->
+			throw error if error?
+		.on "error", (error) ->
+			console.error "error starting MockOverleafAPI:", error.message
+			process.exit(1)
+
+MockV1Api.run()