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9b2d947786
Change-Id: I5fcd2d53435c70fc90b46c34ea5fbf5f17c450fc Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/140649 Reviewed-by: Bob Nystrom <rnystrom@google.com>
107 lines
2.9 KiB
Dart
107 lines
2.9 KiB
Dart
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library IndexedDB3Test;
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import 'package:async_helper/async_helper.dart';
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import 'package:async_helper/async_minitest.dart';
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import 'dart:async';
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import 'dart:html' as html;
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import 'dart:indexed_db';
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// Read with cursor.
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const String DB_NAME = 'Test3';
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const String STORE_NAME = 'TEST';
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const int VERSION = 1;
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Future<Database> createAndOpenDb() {
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return html.window.indexedDB!.deleteDatabase(DB_NAME).then((_) {
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return html.window.indexedDB!.open(DB_NAME, version: VERSION,
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onUpgradeNeeded: (VersionChangeEvent e) {
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var db = e.target.result;
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db.createObjectStore(STORE_NAME);
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});
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});
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}
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Future<Database> writeItems(Database db) {
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Future<Object> write(index) {
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var transaction = db.transaction(STORE_NAME, 'readwrite');
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transaction.objectStore(STORE_NAME).put('Item $index', index);
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return transaction.completed;
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}
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var future = write(0);
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for (var i = 1; i < 100; ++i) {
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future = future.then((_) => write(i));
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}
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// Chain on the DB so we return it at the end.
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return future.then((_) => db);
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}
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Future<Database> setupDb() {
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return createAndOpenDb().then(writeItems);
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}
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Future<Database> readAllViaCursor(Database db) {
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Transaction txn = db.transaction(STORE_NAME, 'readonly');
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ObjectStore objectStore = txn.objectStore(STORE_NAME);
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int itemCount = 0;
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int sumKeys = 0;
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var lastKey = null;
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var cursors = objectStore.openCursor().asBroadcastStream();
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cursors.listen((cursor) {
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++itemCount;
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lastKey = cursor.key;
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sumKeys += cursor.key as int;
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expect(cursor.value, 'Item ${cursor.key}');
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cursor.next();
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});
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cursors.last.then((cursor) {
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expect(lastKey, 99);
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expect(sumKeys, (100 * 99) ~/ 2);
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expect(itemCount, 100);
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});
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return cursors.last.then((_) => db);
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}
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Future<Database> readAllReversedViaCursor(Database db) {
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Transaction txn = db.transaction(STORE_NAME, 'readonly');
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ObjectStore objectStore = txn.objectStore(STORE_NAME);
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int itemCount = 0;
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int sumKeys = 0;
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var lastKey = null;
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var cursors = objectStore.openCursor(direction: 'prev').asBroadcastStream();
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cursors.listen((cursor) {
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++itemCount;
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lastKey = cursor.key;
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sumKeys += cursor.key as int;
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expect(cursor.value, 'Item ${cursor.key}');
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cursor.next();
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});
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cursors.last.then((cursor) {
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expect(lastKey, 0);
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expect(sumKeys, (100 * 99) ~/ 2);
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expect(itemCount, 100);
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});
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return cursors.last.then((_) => db);
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}
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main() {
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// Don't bother with these tests if it's unsupported.
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// Support is tested in indexeddb_1_test
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if (IdbFactory.supported) {
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asyncTest(() async {
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var db = await setupDb();
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await readAllViaCursor(db);
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await readAllReversedViaCursor(db);
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});
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}
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}
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