[test] Add core `test-http-set-cookies` test

Modifications:

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

test/core/simple/test-http-set-cookies.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 nresponses = 0;
+
+var server = http.createServer(function(req, res) {
+  if (req.url == '/one') {
+    res.writeHead(200, [['set-cookie', 'A'],
+                        ['content-type', 'text/plain']]);
+    res.end('one\n');
+  } else {
+    res.writeHead(200, [['set-cookie', 'A'],
+                        ['set-cookie', 'B'],
+                        ['content-type', 'text/plain']]);
+    res.end('two\n');
+  }
+});
+server.listen(common.PORT);
+
+server.on('listening', function() {
+  //
+  // one set-cookie header
+  //
+  http.get({ port: common.PROXY_PORT, path: '/one' }, function(res) {
+    // set-cookie headers are always return in an array.
+    // even if there is only one.
+    assert.deepEqual(['A'], res.headers['set-cookie']);
+    assert.equal('text/plain', res.headers['content-type']);
+
+    res.on('data', function(chunk) {
+      console.log(chunk.toString());
+    });
+
+    res.on('end', function() {
+      if (++nresponses == 2) {
+        server.close();
+      }
+    });
+  });
+
+  // two set-cookie headers
+
+  http.get({ port: common.PROXY_PORT, path: '/two' }, function(res) {
+    assert.deepEqual(['A', 'B'], res.headers['set-cookie']);
+    assert.equal('text/plain', res.headers['content-type']);
+
+    res.on('data', function(chunk) {
+      console.log(chunk.toString());
+    });
+
+    res.on('end', function() {
+      if (++nresponses == 2) {
+        server.close();
+      }
+    });
+  });
+
+});
+
+process.on('exit', function() {
+  assert.equal(2, nresponses);
+});