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| 1 <!doctype html> |
| 2 <meta charset="utf-8"> |
| 3 <meta name="timeout" content="long"> |
| 4 <title>IndexedDB: Interleaved iteration of multiple cursors over the same data</
title> |
| 5 <link rel="author" href="pwnall@chromium.org" title="Victor Costan"> |
| 6 <script src="/resources/testharness.js"></script> |
| 7 <script src="/resources/testharnessreport.js"></script> |
| 8 <script src="support-promises.js"></script> |
| 9 <script src="interleaved-cursors-support.js"></script> |
| 10 <script> |
| 11 'use strict'; |
| 12 |
| 13 // Number of objects that each iterator goes over. |
| 14 const itemCount = 8; |
| 15 |
| 16 // Ratio of small objects to large objects. |
| 17 const largeObjectRatio = 5; |
| 18 |
| 19 function objectKey(cursorIndex, itemIndex) { |
| 20 const itemString = itemIndex.toString().padStart(5, '0'); |
| 21 return `key-${itemString}`; |
| 22 } |
| 23 |
| 24 function objectValue(cursorIndex, itemIndex) { |
| 25 if ((itemCount + itemIndex) % largeObjectRatio === 0) |
| 26 return largeObjectValue(0, itemIndex); |
| 27 return ['small', itemIndex]; |
| 28 } |
| 29 |
| 30 for (let cursorCount of [1, 10, 100, 1000]) { |
| 31 promise_test(testCase => { |
| 32 return createDatabase(testCase, (database, transaction) => { |
| 33 const store = database.createObjectStore('cache', { keyPath: 'key' }); |
| 34 }).then(database => { |
| 35 return populateTestStore(testCase, database, 1).then(() => database); |
| 36 }).then(database => { |
| 37 database.close(); |
| 38 }).then(() => { |
| 39 return openDatabase(testCase); |
| 40 }).then(database => { |
| 41 const transaction = database.transaction('cache', 'readonly'); |
| 42 transaction.onabort = () => { reject(transaction.error); }; |
| 43 |
| 44 const store = transaction.objectStore('cache'); |
| 45 return interleaveCursors(testCase, store, cursorCount, itemCount).then( |
| 46 () => database); |
| 47 }).then(database => { |
| 48 database.close(); |
| 49 }); |
| 50 }, `${cursorCount} cursors`); |
| 51 } |
| 52 |
| 53 </script> |
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