Let the OS pick a port for the tests to use

test/client-opstream.coffee

@@ -7,8 +7,6 @@ OpStream = require('../src/client/opstream').OpStream
 
 helpers = require './helpers'
 
-port = 8765
-
 # Client stream tests
 module.exports = testCase {
 	setUp: (callback) ->
@@ -22,14 +20,14 @@ module.exports = testCase {
 		@model = server.createModel options
 		@server = server options, @model
 
-		@server.listen port, =>
-			@ds = new OpStream 'localhost', port
+		@server.listen =>
+			@ds = new OpStream 'localhost', @server.address().port
 			callback()
 
 	tearDown: (callback) ->
 		@ds.disconnect()
 
-		# Its important the port has closed before the next test is run.
+		# The port should be closed before the next test is run.
 		@server.on 'close', callback
 		@server.close()
 

test/client.coffee

@@ -9,8 +9,6 @@ client = require '../src/client'
 
 makePassPart = require('./helpers').makePassPart
 
-port = 8765
-
 module.exports = testCase {
 	setUp: (callback) ->
 		@name = 'testingdoc'
@@ -24,8 +22,8 @@ module.exports = testCase {
 		@model = server.createModel options
 		@server = server options, @model
 
-		@server.listen port, =>
-			@c = new client.Connection 'localhost', port
+		@server.listen =>
+			@c = new client.Connection 'localhost', @server.address().port
 			callback()
 
 	tearDown: (callback) ->

test/integration.coffee

@@ -12,16 +12,15 @@ types = require '../src/types'
 
 client = require '../src/client'
 
-port = 8765
-
 module.exports = testCase {
 	setUp: (callback) ->
 		# This is needed for types.text.generateRandomOp
 		require './types/text'
 
 		@name = 'testingdoc'
 		@server = server {db: {type: 'memory'}}
-		@server.listen port, =>
+		@server.listen =>
+			port = @server.address().port
 
 			@c1 = new client.Connection 'localhost', port
 			@c2 = new client.Connection 'localhost', port

test/rest.coffee

@@ -9,12 +9,9 @@ server = require '../src/server'
 
 helpers = require './helpers'
 
-# This test creates a server listening on a local port.
-port = 8765
-
 # Async fetch. Aggregates whole response and sends to callback.
 # Callback should be function(response, data) {...}
-fetch = (method, path, postData, callback) ->
+fetch = (method, port, path, postData, callback) ->
 	request = http.request {method:method, path:path, host: 'localhost', port:port}, (response) ->
 		data = ''
 		response.on 'data', (chunk) -> data += chunk
@@ -45,7 +42,9 @@ module.exports = testCase {
 		try
 			@model = server.createModel options
 			@server = server options, @model
-			@server.listen port, callback
+			@server.listen =>
+				@port = @server.address().port
+				callback()
 		catch e
 			console.log e.stack
 			throw e
@@ -55,56 +54,56 @@ module.exports = testCase {
 		@server.close()
 
 	'return 404 when on GET on a random URL': (test) ->
-		fetch 'GET', "/doc/#{@name}", null, (res, data) ->
+		fetch 'GET', @port, "/doc/#{@name}", null, (res, data) ->
 			test.strictEqual(res.statusCode, 404)
 			test.done()
 
 	'GET a document returns the document snapshot': (test) ->
 		helpers.applyOps @model, @name, 0, [{type: 'simple'}, {position: 0, text: 'Hi'}], (error, _) =>
-			fetch 'GET', "/doc/#{@name}", null, (res, data) ->
+			fetch 'GET', @port, "/doc/#{@name}", null, (res, data) ->
 				test.strictEqual(res.statusCode, 200)
 				test.deepEqual data, {v:2, type:'simple', snapshot:{str:'Hi'}}
 				test.done()
 
 	'POST a document in the DB returns 200 OK': (test) ->
-		fetch 'POST', "/doc/#{@name}?v=0", {type:'simple'}, (res, data) =>
+		fetch 'POST', @port, "/doc/#{@name}?v=0", {type:'simple'}, (res, data) =>
 			test.strictEqual res.statusCode, 200
 			test.deepEqual data, {v:0}
 
-			fetch 'POST', "/doc/#{@name}?v=1", {position: 0, text: 'Hi'}, (res, data) =>
+			fetch 'POST', @port, "/doc/#{@name}?v=1", {position: 0, text: 'Hi'}, (res, data) =>
 				test.strictEqual res.statusCode, 200
 				test.deepEqual data, {v:1}
-				fetch 'GET', "/doc/#{@name}", null, (res, data) ->
+				fetch 'GET', @port, "/doc/#{@name}", null, (res, data) ->
 					test.strictEqual res.statusCode, 200
 					test.deepEqual data, {v:2, type:'simple', snapshot:{str: 'Hi'}}
 					test.done()
 
 	'POST a document with no version returns 400': (test) ->
-		fetch 'POST', "/doc/#{@name}", {type:'simple'}, (res, data) ->
+		fetch 'POST', @port, "/doc/#{@name}", {type:'simple'}, (res, data) ->
 			test.strictEqual res.statusCode, 400
 			test.done()
 
 	'POST a document with invalid JSON returns 400': (test) ->
-		fetch 'POST', "/doc/#{@name}?v=0", 'invalid>{json', (res, data) ->
+		fetch 'POST', @port, "/doc/#{@name}?v=0", 'invalid>{json', (res, data) ->
 			test.strictEqual res.statusCode, 400
 			test.done()
 
 	'DELETE deletes a document': (test) ->
 		@model.applyOp @name, {v:0, op:{type:'simple'}}, (error, newVersion) =>
 			test.ifError(error)
-			fetch 'DELETE', "/doc/#{@name}", null, (res, data) ->
+			fetch 'DELETE', @port, "/doc/#{@name}", null, (res, data) ->
 				test.strictEqual res.statusCode, 200
 				test.done()
 
 	'DELETE returns a 404 message if you delete something that doesn\'t exist': (test) ->
-		fetch 'DELETE', "/doc/#{@name}", null, (res, data) ->
+		fetch 'DELETE', @port, "/doc/#{@name}", null, (res, data) ->
 			test.strictEqual res.statusCode, 404
 			test.done()
 
 	'DELETE doesnt work if you dont select it in the options': (test) ->
 		s = server {db: {type: 'memory'}}, @model
-		p = port + 1
-		s.listen p, =>
+		s.listen =>
+			p = s.address().port
 			@model.applyOp @name, {v:0, op:{type:'simple'}}, (error, newVersion) =>
 				test.ifError(error)
 				request = http.request {method:'DELETE', path:"/doc/#{@name}", host: 'localhost', port:p}, (res) =>

test/socketio.coffee

@@ -1,7 +1,5 @@
 # Tests for the server's socketio interface
 
-port = 8765
-
 testCase = require('nodeunit').testCase
 assert = require 'assert'
 clientio = require('../thirdparty/Socket.io-node-client/lib/io-client').io
@@ -42,11 +40,11 @@ module.exports = testCase {
 			@model = server.createModel options
 			@server = server options, @model
 
-			@server.listen port, =>
+			@server.listen =>
 				@name = 'testingdoc'
 
 				# Make a new socket.io socket connected to the server's stream interface
-				@socket = new clientio.Socket 'localhost', {port: port, resource: 'socket.io'}
+				@socket = new clientio.Socket 'localhost', {port: @server.address().port, resource: 'socket.io'}
 				@socket.connect()
 				@socket.on 'connect', callback
 		catch e