Adding supported checks and flags to FormData

tests/html/xhr_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library XHRTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
+import 'dart:async';
 import 'dart:html';
 import 'dart:json' as json;
 
 void fail(message) {
   guardAsync(() {
     expect(false, isTrue, reason: message);
   });
 }
 
 main() {
   useHtmlIndividualConfiguration();
   var url = "/tests/html/xhr_cross_origin_data.txt";
 
   void validate200Response(xhr) {
     expect(xhr.status, equals(200));
-    var data = json.parse(xhr.response);
+    var data = json.parse(xhr.responseText);
     expect(data, contains('feed'));
     expect(data['feed'], contains('entry'));
     expect(data, isMap);
   }
 
   void validate404(xhr) {
     expect(xhr.status, equals(404));
     expect(xhr.responseText, equals(''));
   }
 
   group('supported_HttpRequestProgressEvent', () {
     test('supported', () {
       expect(HttpRequestProgressEvent.supported, isTrue);
     });
   });
 
+  group('supported_onProgress', () {
+    test('supported', () {
+      expect(HttpRequest.supportsProgressEvent, isTrue);
+    });
+  });
+
+  group('supported_onLoadEnd', () {
+    test('supported', () {
+      expect(HttpRequest.supportsLoadEndEvent, isTrue);
+    });
+  });
+
   group('xhr', () {
     test('XHR No file', () {
       HttpRequest xhr = new HttpRequest();
       xhr.open("GET", "NonExistingFile", true);
       xhr.onReadyStateChange.listen(expectAsyncUntil1((event) {
         if (xhr.readyState == HttpRequest.DONE) {
           validate404(xhr);
         }
       }, () => xhr.readyState == HttpRequest.DONE));
       xhr.send();
     });
 
     test('XHR file', () {
+      var loadEndCalled = false;
+
       var xhr = new HttpRequest();
       xhr.open('GET', url, true);
       xhr.onReadyStateChange.listen(expectAsyncUntil1((e) {
         if (xhr.readyState == HttpRequest.DONE) {
           validate200Response(xhr);
+
+          Timer.run(expectAsync0(() {
+            expect(loadEndCalled, HttpRequest.supportsLoadEndEvent);
+          }));
         }
       }, () => xhr.readyState == HttpRequest.DONE));
 
-      xhr.onLoadEnd.listen(expectAsync1((ProgressEvent e) {
-        expect(e.currentTarget, xhr);
-        expect(e.target, xhr);
-      }));
+      xhr.onLoadEnd.listen((ProgressEvent e) {
+        loadEndCalled = true;
+      });
       xhr.send();
     });
 
     test('XHR.request No file', () {
       HttpRequest.request('NonExistingFile').then(
         (_) { fail('Request should not have succeeded.'); },
         onError: expectAsync1((e) {
           var xhr = e.error.target;
           expect(xhr.readyState, equals(HttpRequest.DONE));
           validate404(xhr);
         }));
     });
 
     test('XHR.request file', () {
       HttpRequest.request(url).then(expectAsync1((xhr) {
         expect(xhr.readyState, equals(HttpRequest.DONE));
         validate200Response(xhr);
       }));
     });
 
     test('XHR.request onProgress', () {
       var progressCalled = false;
       HttpRequest.request(url,
         onProgress: (_) {
           progressCalled = true;
         }).then(expectAsync1(
           (xhr) {
             expect(xhr.readyState, equals(HttpRequest.DONE));
-            expect(progressCalled, isTrue);
+            expect(progressCalled, HttpRequest.supportsProgressEvent);
             validate200Response(xhr);
           }));
     });
 
     test('XHR.request withCredentials No file', () {
       HttpRequest.request('NonExistingFile', withCredentials: true).then(
         (_) { fail('Request should not have succeeded.'); },
         onError: expectAsync1((e) {
           var xhr = e.error.target;
           expect(xhr.readyState, equals(HttpRequest.DONE));
@@ skipping 35 matching lines @@
     test('HttpRequestProgressEvent', () {
       var expectation = HttpRequestProgressEvent.supported ?
           returnsNormally : throws;
       expect(() {
         var event = new Event.eventType('XMLHttpRequestProgressEvent', '');
         expect(event is HttpRequestProgressEvent, isTrue);
       }, expectation);
     });
   });
 }