Normalize IE XHR bug (status code 1223 to 204)

See http://bugs.jquery.com/ticket/1450

Author: vojtajina

src/Browser.js

@@ -113,7 +113,9 @@ function Browser(window, document, body, XHR, $log) {
       });
       xhr.onreadystatechange = function() {
         if (xhr.readyState == 4) {
-          completeOutstandingRequest(callback, xhr.status || 200, xhr.responseText);
+          // normalize IE bug (http://bugs.jquery.com/ticket/1450)
+          var status = xhr.status == 1223 ? 204 : xhr.status || 200;
+          completeOutstandingRequest(callback, status, xhr.responseText);
         }
       };
       xhr.send(post || '');

test/BrowserSpecs.js

@@ -124,6 +124,19 @@ describe('browser', function(){
       expect(response).toEqual('RESPONSE');
     });
 
+    it('should normalize IE\'s 1223 status code into 204', function() {
+      var callback = jasmine.createSpy('XHR');
+
+      browser.xhr('GET', 'URL', 'POST', callback);
+
+      xhr.status = 1223;
+      xhr.readyState = 4;
+      xhr.onreadystatechange();
+
+      expect(callback).toHaveBeenCalled();
+      expect(callback.argsForCall[0][0]).toEqual(204);
+    });
+
     it('should not set Content-type header for GET requests', function() {
       browser.xhr('GET', 'URL', 'POST-DATA', function(c, r) {});