Added req.xhr tests

test/req.xhr.js

@@ -0,0 +1,54 @@
+
+var express = require('../')
+  , request = require('./support/http');
+
+describe('req', function(){
+  describe('.xhr', function(){
+    it('should return true when X-Requested-With is xmlhttprequest', function(done){
+      var app = express();
+
+      app.use(function(req, res){
+        req.xhr.should.be.true;
+        res.end();
+      });
+
+      request(app)
+      .get('/')
+      .set('X-Requested-With', 'xmlhttprequest')
+      .end(function(res){
+        done();
+      })
+    })
+    
+    it('should return false otherwise', function(done){
+      var app = express();
+
+      app.use(function(req, res){
+        req.xhr.should.be.false;
+        res.end();
+      });
+
+      request(app)
+      .get('/')
+      .set('X-Requested-With', 'blahblah')
+      .end(function(res){
+        done();
+      })
+    })
+    
+    it('should return false when not present', function(done){
+      var app = express();
+
+      app.use(function(req, res){
+        req.xhr.should.be.false;
+        res.end();
+      });
+
+      request(app)
+      .get('/')
+      .end(function(res){
+        done();
+      })
+    })
+  })
+})