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| 1 <!DOCTYPE html> |
| 2 <title>StorageManager: estimate()</title> |
| 3 <script src="../../resources/testharness.js"></script> |
| 4 <script src="../../resources/testharnessreport.js"></script> |
| 5 <script src="resources/testharness-helpers.js"></script> |
| 6 <script> |
| 7 |
| 8 test(function(t) { |
| 9 assert_true('estimate' in window.navigator.storage); |
| 10 assert_equals(typeof window.navigator.storage.estimate, 'function'); |
| 11 assert_true(window.navigator.storage.estimate() instanceof Promise); |
| 12 }, 'estimate() method exists and returns a Promise'); |
| 13 |
| 14 promise_test(function(t) { |
| 15 return window.navigator.storage.estimate().then(function(result) { |
| 16 assert_true(typeof result === 'object'); |
| 17 assert_true('usage' in result); |
| 18 assert_equals(typeof result.usage, 'number'); |
| 19 assert_true('quota' in result); |
| 20 assert_equals(typeof result.quota, 'number'); |
| 21 }); |
| 22 }, 'estimate() resolves to dictionary with members'); |
| 23 |
| 24 |
| 25 // Simple Promise wrappers for IndexedDB to make async testing easier. |
| 26 function deleteDB(name) { |
| 27 return new Promise(function(resolve, reject) { |
| 28 var del = indexedDB.deleteDatabase(name); |
| 29 del.onerror = function() { reject(del.error); }; |
| 30 del.onsuccess = function() { resolve(); }; |
| 31 }); |
| 32 } |
| 33 function openDB(name, upgrade) { |
| 34 return new Promise(function(resolve, reject) { |
| 35 var open = indexedDB.open(name); |
| 36 open.onerror = function() { reject(open.error); }; |
| 37 open.onupgradeneeded = function() { upgrade(open.result); }; |
| 38 open.onsuccess = function() { resolve(open.result); }; |
| 39 }); |
| 40 } |
| 41 function transactionToPromise(tx) { |
| 42 return new Promise(function(resolve, reject) { |
| 43 tx.onabort = function() { reject(tx.error); }; |
| 44 tx.oncomplete = function() { resolve(); }; |
| 45 }); |
| 46 } |
| 47 |
| 48 promise_test(function(t) { |
| 49 var large_value = new Uint8Array(1e6); |
| 50 var dbname = 'db' + window.location; |
| 51 var db, before, after; |
| 52 |
| 53 return deleteDB(name) |
| 54 .then(() => openDB(name, db => { db.createObjectStore('store'); })) |
| 55 .then(connection => { |
| 56 db = connection; |
| 57 return navigator.storage.estimate(); |
| 58 }) |
| 59 .then(estimate => { |
| 60 before = estimate.usage; |
| 61 var tx = db.transaction('store', 'readwrite'); |
| 62 tx.objectStore('store').put(large_value, 'k'); |
| 63 return transactionToPromise(tx); |
| 64 }) |
| 65 .then(() => { |
| 66 return navigator.storage.estimate(); |
| 67 }) |
| 68 .then(estimate => { |
| 69 after = estimate.usage; |
| 70 assert_greater_than(after, before, |
| 71 'estimated usage should increase'); |
| 72 // This assertion may not hold, e.g. if the implementation compresse
s |
| 73 // the data or pre-allocate blocks larger than the value being store
d. |
| 74 assert_greater_than_equal(after - before, large_value.length, |
| 75 'increase should be at least as large as value stored'); |
| 76 |
| 77 db.close(); |
| 78 return deleteDB(name); |
| 79 }); |
| 80 }, 'estimate() shows usage increase after large value is stored'); |
| 81 |
| 82 </script> |
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Chromium Code Reviews
Issue 1855623002:
Implement quota estimation API from Storage spec (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master