Automatically generate most constructors

client/tests/client/dom/HTMLAudioElementTest.dart

Index: client/tests/client/dom/HTMLAudioElementTest.dart
diff --git a/client/tests/client/dom/HTMLAudioElementTest.dart b/client/tests/client/dom/HTMLAudioElementTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1b59d878077f04b8475c2465e234c1ca8f57d782
--- /dev/null
+++ b/client/tests/client/dom/HTMLAudioElementTest.dart
@@ -0,0 +1,21 @@
+#library('HTMLAudioElementTest');
+#import('../../../testing/unittest/unittest.dart');
+#import('dart:dom');
+
+main() {
+
+  forLayoutTests();
+
+  test('constructorTest1', () {
+      var audio = new HTMLAudioElement();   // would be new Audio() in JS
+      Expect.isTrue(audio != null);
+      Expect.isTrue(audio is HTMLAudioElement);
+    });
+
+  test('constructorTest2', () {
+      var audio = new HTMLAudioElement('hahaURL');
+      Expect.isTrue(audio != null);
+      Expect.isTrue(audio is HTMLAudioElement);
+      Expect.isTrue(audio.src.indexOf('hahaURL') >= 0);
+    });
+}