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

test/codegen/lib/html/indexeddb_3_test.dart

+library IndexedDB3Test;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'dart:async';
+import 'dart:html' as html;
+import 'dart:indexed_db';
+
+// Read with cursor.
+
+const String DB_NAME = 'Test3';
+const String STORE_NAME = 'TEST';
+const int VERSION = 1;
+
+
+Future<Database> createAndOpenDb() {
+  return html.window.indexedDB.deleteDatabase(DB_NAME).then((_) {
+    return html.window.indexedDB.open(DB_NAME, version: VERSION,
+        onUpgradeNeeded: (e) {
+          var db = e.target.result;
+          db.createObjectStore(STORE_NAME);
+        });
+  });
+}
+
+Future<Database> writeItems(Database db) {
+  Future<Object> write(index) {
+    var transaction = db.transaction(STORE_NAME, 'readwrite');
+    transaction.objectStore(STORE_NAME).put('Item $index', index);
+    return transaction.completed;
+  }
+
+  var future = write(0);
+  for (var i = 1; i < 100; ++i) {
+    future = future.then((_) => write(i));
+  }
+
+  // Chain on the DB so we return it at the end.
+  return future.then((_) => db);
+}
+
+Future<Database> setupDb() {
+  return createAndOpenDb().then(writeItems);
+}
+
+Future<Database> readAllViaCursor(Database db) {
+  Transaction txn = db.transaction(STORE_NAME, 'readonly');
+  ObjectStore objectStore = txn.objectStore(STORE_NAME);
+  int itemCount = 0;
+  int sumKeys = 0;
+  var lastKey = null;
+
+  var cursors = objectStore.openCursor().asBroadcastStream();
+  cursors.listen(
+    (cursor) {
+      ++itemCount;
+      lastKey = cursor.key;
+      sumKeys += cursor.key;
+      expect(cursor.value, 'Item ${cursor.key}');
+      cursor.next();
+    });
+  cursors.last.then(
+    (cursor) {
+      expect(lastKey, 99);
+      expect(sumKeys, (100 * 99) ~/ 2);
+      expect(itemCount, 100);
+    });
+
+  return cursors.last.then((_) => db);
+}
+
+Future<Database> readAllReversedViaCursor(Database db) {
+  Transaction txn = db.transaction(STORE_NAME, 'readonly');
+  ObjectStore objectStore = txn.objectStore(STORE_NAME);
+  int itemCount = 0;
+  int sumKeys = 0;
+  var lastKey = null;
+
+  var cursors = objectStore.openCursor(direction: 'prev').asBroadcastStream();
+  cursors.listen(
+    (cursor) {
+      ++itemCount;
+      lastKey = cursor.key;
+      sumKeys += cursor.key;
+      expect(cursor.value, 'Item ${cursor.key}');
+      cursor.next();
+    });
+  cursors.last.then(
+    (cursor) {
+      expect(lastKey, 0);
+      expect(sumKeys, (100 * 99) ~/ 2);
+      expect(itemCount, 100);
+    });
+  return cursors.last.then((_) => db);
+}
+
+main() {
+  useHtmlConfiguration();
+
+  // Don't bother with these tests if it's unsupported.
+  // Support is tested in indexeddb_1_test
+  if (IdbFactory.supported) {
+    var db;
+    test('prepare', () {
+      return setupDb().then((result) { db = result; });
+    });
+    test('readAll1', () {
+      return readAllViaCursor(db);
+    });
+
+    test('readAll2', () {
+      return readAllReversedViaCursor(db);
+    });
+  }
+}