[test] Add core `test-http-upload-timeout` test

Modifications:

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

test/core/pummel/test-http-upload-timeout.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.
+
+// This tests setTimeout() by having multiple clients connecting and sending
+// data in random intervals. Clients are also randomly disconnecting until there
+// are no more clients left. If no false timeout occurs, this test has passed.
+var common = require('../common'),
+    assert = require('assert'),
+    http = require('http'),
+    server = http.createServer(),
+    connections = 0;
+
+server.on('request', function(req, res) {
+  req.socket.setTimeout(1000);
+  req.socket.on('timeout', function() {
+    throw new Error('Unexpected timeout');
+  });
+  req.on('end', function() {
+    connections--;
+    res.writeHead(200);
+    res.end('done\n');
+    if (connections == 0) {
+      server.close();
+    }
+  });
+});
+
+server.listen(common.PORT, '127.0.0.1', function() {
+  for (var i = 0; i < 10; i++) {
+    connections++;
+
+    setTimeout(function() {
+      var request = http.request({
+        port: common.PROXY_PORT,
+        method: 'POST',
+        path: '/'
+      });
+
+      function ping() {
+        var nextPing = (Math.random() * 900).toFixed();
+        if (nextPing > 600) {
+          request.end();
+          return;
+        }
+        request.write('ping');
+        setTimeout(ping, nextPing);
+      }
+      ping();
+    }, i * 50);
+  }
+});