Explicitly wait for S3 in acceptance tests

services/filestore/test/acceptance/coffee/FilestoreApp.coffee

@@ -2,6 +2,9 @@ app = require('../../../app')
 require("logger-sharelatex").logger.level("info")
 logger = require("logger-sharelatex")
 Settings = require("settings-sharelatex")
+request = require('request')
+
+S3_TRIES = 30
 
 module.exports =
 	running: false
@@ -22,3 +25,21 @@ module.exports =
 
 				for callback in @callbacks
 					callback()
+
+	waitForS3: (callback, tries) ->
+		return callback() unless Settings.filestore.s3?.endpoint
+		tries = 1 unless tries
+
+		request.get "#{Settings.filestore.s3.endpoint}/", (err, response) =>
+			console.log(err, response?.statusCode, tries)
+			if !err && [200, 404].includes(response?.statusCode)
+				return callback()
+
+			if tries == S3_TRIES
+				return callback('timed out waiting for S3')
+
+			setTimeout(
+				() =>
+					@waitForS3 callback, tries + 1
+				1000
+			)

services/filestore/test/acceptance/coffee/SendingFileTest.coffee

@@ -29,8 +29,10 @@ describe "Filestore", ->
 			"there are 3 lines in all"
 		].join("\n")
 
-		fs.writeFile(@localFileReadPath, @constantFileContent, done)
 		@filestoreUrl = "http://localhost:#{settings.internal.filestore.port}"
+		fs.writeFile @localFileReadPath, @constantFileContent, (err) ->
+			return done(err) if err
+			FilestoreApp.waitForS3(done)
 
 	beforeEach (done)->
 		FilestoreApp.ensureRunning =>