Added failing test for #125.

tests/test-headers.js

@@ -0,0 +1,52 @@
+var server = require('./server')
+  , assert = require('assert')
+  , request = require('../main.js')
+  , Cookie = require('../vendor/cookie')
+  , Jar = require('../vendor/cookie/jar')
+  , s = server.createServer()
+
+s.listen(s.port, function () {
+  var serverUri = 'http://localhost:' + s.port
+    , numTests = 0
+    , numOutstandingTests = 0
+
+  function createTest(requestObj, serverAssertFn) {
+    var testNumber = numTests;
+    numTests += 1;
+    numOutstandingTests += 1;
+    s.on('/' + testNumber, function (req, res) {
+      serverAssertFn(req, res);
+      res.writeHead(200);
+      res.end();
+    });
+    requestObj.url = serverUri + '/' + testNumber
+    request(requestObj, function (err, res, body) {
+      assert.ok(!err)
+      assert.equal(res.statusCode, 200)
+      numOutstandingTests -= 1
+      if (numOutstandingTests === 0) {
+        console.log(numTests + ' tests passed.')
+        s.close()
+      }
+    })
+  }
+
+  // Issue #125: headers.cookie shouldn't be replaced when a cookie jar isn't specified
+  createTest({headers: {cookie: 'foo=bar'}}, function (req, res) {
+    assert.ok(req.headers.cookie)
+    assert.equal(req.headers.cookie, 'foo=bar')
+  })
+
+  // Issue #125: headers.cookie + cookie jar
+  var jar = new Jar()
+  jar.add(new Cookie('quux=baz'));
+  createTest({jar: jar, headers: {cookie: 'foo=bar'}}, function (req, res) {
+    assert.ok(req.headers.cookie)
+    assert.equal(req.headers.cookie, 'foo=bar; quux=baz')
+  })
+
+  // There should be no cookie header when neither headers.cookie nor a cookie jar is specified
+  createTest({}, function (req, res) {
+    assert.ok(!req.headers.cookie)
+  })
+})