fix(tests): correct spelling of 'throw' in error messages

lib/response.js

@@ -825,6 +825,18 @@ res.redirect = function redirect(url) {
     address = arguments[1]
   }
 
+  if (!address) {
+    throw new TypeError('url argument is required to res.redirect');
+  }
+
+  if (typeof address !== 'string') {
+    throw new TypeError('res.redirect: url must be a string');
+  }
+
+  if (typeof status !== 'number') {
+    throw new TypeError('res.redirect: status must be a number');
+  }
+
   // Set location header
   address = this.location(address).get('Location');
 

test/res.redirect.js

@@ -19,6 +19,42 @@ describe('res', function(){
       .expect(302, done)
     })
 
+    it('should throw an error if the url is missing', function(done){
+      var app = express();
+
+      app.use(function (req, res) {
+        res.redirect(undefined)
+      })
+
+      request(app)
+      .get('/')
+      .expect(500, /url argument is required to res.redirect/, done)
+    })
+
+    it('should throw an error if the url is not a string', function(done){
+      var app = express();
+
+      app.use(function (req, res) {
+        res.redirect(['http://google.com'])
+      })
+
+      request(app)
+      .get('/')
+      .expect(500, /res.redirect: url must be a string/, done)
+    })
+
+    it('should throw an error if the status is not a number', function(done){
+      var app = express();
+
+      app.use(function (req, res) {
+        res.redirect("300", 'http://google.com')
+      })
+
+      request(app)
+      .get('/')
+      .expect(500, /res.redirect: status must be a number/, done)
+    })
+
     it('should encode "url"', function (done) {
       var app = express()