[test] Add core `test-http-chunked` test

Modifications:

  * make client connect to `PROXY_PORT` instead of `PORT`

test/core/simple/test-http-chunked.js

+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+var http = require('http');
+
+var UTF8_STRING = '南越国是前203年至前111年存在于岭南地区的一个国家，' +
+                  '国都位于番禺，疆域包括今天中国的广东、广西两省区的大部份地区，福建省、湖南、' +
+                  '贵州、云南的一小部份地区和越南的北部。南越国是秦朝灭亡后，' +
+                  '由南海郡尉赵佗于前203年起兵兼并桂林郡和象郡后建立。前196年和前179年，' +
+                  '南越国曾先后两次名义上臣属于西汉，成为西汉的“外臣”。前112年，' +
+                  '南越国末代君主赵建德与西汉发生战争，被汉武帝于前111年所灭。' +
+                  '南越国共存在93年，历经五代君主。南越国是岭南地区的第一个有记载的政权国家，' +
+                  '采用封建制和郡县制并存的制度，它的建立保证了秦末乱世岭南地区社会秩序的稳定，' +
+                  '有效的改善了岭南地区落后的政治、经济现状。';
+
+var server = http.createServer(function(req, res) {
+  res.writeHead(200, {'Content-Type': 'text/plain; charset=utf8'});
+  res.end(UTF8_STRING, 'utf8');
+});
+server.listen(common.PORT, function() {
+  var data = '';
+  var get = http.get({
+    path: '/',
+    host: 'localhost',
+    port: common.PROXY_PORT
+  }, function(x) {
+    x.setEncoding('utf8');
+    x.on('data', function(c) {data += c});
+    x.on('error', function(e) {
+      throw e;
+    });
+    x.on('end', function() {
+      assert.equal('string', typeof data);
+      console.log('here is the response:');
+      assert.equal(UTF8_STRING, data);
+      console.log(data);
+      server.close();
+    });
+  });
+  get.on('error', function(e) {throw e});
+  get.end();
+
+});