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

test/codegen/lib/html/keyboard_event_test.dart

+library KeyboardEventTest;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'dart:html';
+
+// Test that we are correctly determining keyCode and charCode uniformly across
+// browsers.
+
+main() {
+
+  useHtmlConfiguration();
+
+  keydownHandlerTest(KeyEvent e) {
+    expect(e.charCode, 0);
+  }
+
+  test('keyboardEvent constructor', () {
+    var event = new KeyboardEvent('keyup');
+  });
+  test('keys', () {
+    var subscription = KeyboardEventStream.onKeyDown(document.body).listen(
+        keydownHandlerTest);
+    var subscription2 = KeyEvent.keyDownEvent.forTarget(document.body).listen(
+        keydownHandlerTest);
+    var subscription3 = document.body.onKeyDown.listen(
+        (e) => print('regular listener'));
+    subscription.cancel();
+    subscription2.cancel();
+    subscription3.cancel();
+  });
+
+  test('constructKeyEvent', () {
+    var stream = KeyEvent.keyPressEvent.forTarget(document.body);
+    var subscription = stream.listen(expectAsync((keyEvent) {
+      expect(keyEvent.charCode, 97);
+      expect(keyEvent.keyCode, 65);
+    }));
+    var k = new KeyEvent('keypress', keyCode: 65, charCode: 97);
+    stream.add(k);
+    subscription.cancel();
+    // Capital "A":
+    stream.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
+
+    subscription = stream.listen(expectAsync((keyEvent) {
+      expect(keyEvent.charCode, 65);
+      expect(keyEvent.keyCode, 65);
+    }));
+    stream.add(new KeyEvent('keypress', keyCode: 65, charCode: 65));
+    subscription.cancel();
+  });
+
+  test('KeyEventSequence', () {
+    // Press "?" by simulating "shift" and then the key that has "/" and "?" on
+    // it.
+    var streamDown = KeyEvent.keyDownEvent.forTarget(document.body);
+    var streamPress = KeyEvent.keyPressEvent.forTarget(document.body);
+    var streamUp = KeyEvent.keyUpEvent.forTarget(document.body);
+
+    var subscription = streamDown.listen(expectAsync((keyEvent) {
+      expect(keyEvent.keyCode, isIn([16, 191]));
+      expect(keyEvent.charCode, 0);
+    }, count: 2));
+
+    var subscription2 = streamPress.listen(expectAsync((keyEvent) {
+      expect(keyEvent.keyCode, 23);
+      expect(keyEvent.charCode, 63);
+    }));
+
+    var subscription3 = streamUp.listen(expectAsync((keyEvent) {
+      expect(keyEvent.keyCode, isIn([16, 191]));
+      expect(keyEvent.charCode, 0);
+    }, count: 2));
+
+    streamDown.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
+    streamDown.add(new KeyEvent('keydown', keyCode: 191, charCode: 0));
+
+    streamPress.add(new KeyEvent('keypress', keyCode: 23, charCode: 63));
+
+    streamUp.add(new KeyEvent('keyup', keyCode: 191, charCode: 0));
+    streamUp.add(new KeyEvent('keyup', keyCode: 16, charCode: 0));
+    subscription.cancel();
+    subscription2.cancel();
+    subscription3.cancel();
+  });
+
+  test('KeyEventKeyboardEvent', () {
+    window.onKeyDown.listen(expectAsync((KeyboardEvent event) {
+      expect(event.keyCode, 16);
+    }));
+    var streamDown = KeyEvent.keyDownEvent.forTarget(document.body);
+    streamDown.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
+  });
+}
+
+