Reapply "Stop suppressing generation of bindings with Promise. Add some tests for DOM APIs that ans…

tests/html/storage_quota_test.dart

+library storage_quota_test;
+
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+import 'dart:async';
+import 'dart:isolate';
+import 'dart:html';
+
+main() {
+  useHtmlConfiguration();
+
+  expectSaneStorageInfo(StorageInfo storageInfo) {
+     expect(storageInfo.usage, isNotNull);
+     expect(storageInfo.quota, isNotNull);
+     expect(storageInfo.usage >= 0, isTrue);
+     expect(storageInfo.quota >= storageInfo.usage, isNotNull);
+  };
+
+  test('storage quota - temporary', () {
+    Future f = window.navigator.storageQuota.queryInfo('temporary');
+    expect(f.then(expectSaneStorageInfo), completes);
+  });
+
+  test('storage quota - persistent', () {
+    Future f = window.navigator.storageQuota.queryInfo('persistent');
+    expect(f.then(expectSaneStorageInfo), completes);
+  });
+
+  test('storage quota - unknown', () {
+    // Throwing synchronously is bogus upstream behavior; should result in a
+    // smashed promise.
+    expect(() => window.navigator.storageQuota.queryInfo("foo"), throws);  /// missingenumcheck: ok
+    var wrongType = 3;
+    expect(() => window.navigator.storageQuota.queryInfo(wrongType), throws);
+    expect(() => window.navigator.storageQuota.queryInfo(null), throws);
+  });
+}