Add all dart:html tests from the sdk to test/codegen.

test/codegen/lib/html/form_data_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 FormDataTest;
+
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
+import 'dart:html';
+
+void main() {
+  // TODO(efortuna): This is a bad test. Revisit when we have tests that can run
+  // both a server and fire up a browser.
+  useHtmlIndividualConfiguration();
+
+  group('supported', () {
+    test('supported', () {
+      expect(FormData.supported, isTrue);
+    });
+  });
+
+  group('functional', () {
+    test('unsupported throws', () {
+      var expectation = FormData.supported ? returnsNormally : throws;
+      expect(() {
+        new FormData();
+      }, expectation);
+    });
+
+    var isFormData = predicate((x) => x is FormData, 'is a FormData');
+
+    if (FormData.supported) {
+      test('constructorTest1', () {
+        var form = new FormData();
+        expect(form, isNotNull);
+        expect(form, isFormData);
+      });
+
+      test('constructorTest2', () {
+        var form = new FormData(new FormElement());
+        expect(form, isNotNull);
+        expect(form, isFormData);
+      });
+
+      test('appendTest', () {
+        var form = new FormData();
+        form.append('test', '1');
+        form.append('username', 'Elmo');
+        form.append('address', '1 Sesame Street');
+        form.append('password', '123456');
+        expect(form, isNotNull);
+      });
+
+      test('appendBlob', () {
+        var form = new FormData();
+        var blob = new Blob(
+            ['Indescribable... Indestructible! Nothing can stop it!'],
+            'text/plain');
+        form.appendBlob('theBlob', blob, 'theBlob.txt');
+      });
+
+      test('send', () {
+        var form = new FormData();
+        var blobString =
+            'Indescribable... Indestructible! Nothing can stop it!';
+        var blob = new Blob(
+            [blobString],
+            'text/plain');
+        form.appendBlob('theBlob', blob, 'theBlob.txt');
+
+        var xhr = new HttpRequest();
+        xhr.open('POST',
+            '${window.location.protocol}//${window.location.host}/echo');
+
+        xhr.onLoad.listen(expectAsync((e) {
+          expect(xhr.responseText, contains(blobString));
+        }));
+        xhr.onError.listen((e) {
+          fail('$e');
+        });
+        xhr.send(form);
+      });
+    }
+  });
+}