fix http keep-alive test case

package.json

@@ -43,7 +43,9 @@
  "vary": "^1.0.0"
  },
  "devDependencies": {
+ "agentkeepalive": "~2.0.3",
  "babel": "^5.0.0",
+ "freeport": "~1.0.5",
  "istanbul": "^0.4.0",
  "make-lint": "^1.0.1",
  "mocha": "^2.0.1",

test/application.js

@@ -2,8 +2,10 @@
 'use strict';
 
 var stderr = require('test-console').stderr;
+var Agent = require('agentkeepalive');
 var request = require('supertest');
 var statuses = require('statuses');
+var freeport = require('freeport');
 var pedding = require('pedding');
 var assert = require('assert');
 var urllib = require('urllib');
@@ -896,29 +898,47 @@ describe('app.respond', function(){
  })
  })
 
- it('should not destroy keepalive connection', function(done){
- done = pedding(2, done);
- var app = koa();
- app.use(function *(){
- var remote = yield urllib.request('http://koajs.com', {
- streaming: true,
- headers: {
- connection: 'keep-alive'
- }
+ describe('when .body is a http keepalive IncommingMessage', () => {
+ var target;
+ var port;
+ before(function(done){
+ var app = koa();
+ app.use(function *(){
+ this.body = fs.createReadStream(__filename);
  });
- var res = remote.res;
- this.body = res;
- res.once('end', function(){
- assert.equal(res.readable, false);
- assert.equal(res.socket.destroyed, false);
- done();
- }.bind(this));
- });
 
- var server = app.listen();
- request(server)
- .head('/')
- .expect(200, done);
+ freeport(function(err, p){
+ port = p || 12384;
+ target = app.listen(port, done);
+ });
+ })
+
+ after(function(){
+ target.close();
+ })
+
+ it('should not destroy keepalive connection', function(done){
+ done = pedding(2, done);
+ var app = koa();
+ app.use(function *(){
+ var remote = yield urllib.request('http://127.0.0.1:' + port, {
+ streaming: true,
+ agent: new Agent()
+ });
+ var res = remote.res;
+ this.body = res;
+ res.once('end', function(){
+ assert.equal(res.readable, false);
+ assert.equal(res.socket.destroyed, false);
+ done();
+ });
+ });
+
+ var server = app.listen();
+ request(server)
+ .head('/')
+ .expect(200, done);
+ })
  })
 
  describe('when .body is an Object', function(){