<!doctype html> <meta charset="utf-8"> <meta name="timeout" content="long"> <title>IndexedDB: Parallel iteration of cursors in upgradeneeded</title> <link rel="author" href="pwnall@chromium.org" title="Victor Costan"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="resources/support-promises.js"></script> <script> 'use strict'; for (let cursorCount of [2, 20, 200, 2000]) { promise_test(testCase => { return createDatabase(testCase, (database, transaction) => { const store = database.createObjectStore('cache', { keyPath: 'key' }); store.put({ key: '42' }); const promises = []; for (let j = 0; j < 2; j += 1) { const promise = new Promise((resolve, reject) => { let request = null; for (let i = 0; i < cursorCount / 2; i += 1) { request = store.openCursor(); } let continued = false; request.onsuccess = testCase.step_func(() => { const cursor = request.result; if (!continued) { assert_equals(cursor.key, '42'); assert_equals(cursor.value.key, '42'); continued = true; cursor.continue(); } else { assert_equals(cursor, null); resolve(); } }); request.onerror = () => reject(request.error); }); promises.push(promise); } return Promise.all(promises); }).then(database => { database.close(); }); }, `${cursorCount} cursors`); } </script>