add req.host tests

Author: tj

test/req.host.js

@@ -0,0 +1,21 @@
+
+var express = require('../')
+  , request = require('./support/http')
+  , assert = require('assert');
+
+describe('req', function(){
+  describe('.host', function(){
+    it('should return the Host when present', function(done){
+      var app = express();
+
+      app.use(function(req, res){
+        res.end(req.host);
+      });
+
+      request(app)
+      .post('/')
+      .set('Host', 'example.com')
+      .expect('example.com', done);
+    })
+  })
+})