| <!DOCTYPE html> |
| <title>Same-origin prerendering can access localStorage</title> |
| <meta name="variant" content="?target_hint=_self"> |
| <meta name="variant" content="?target_hint=_blank"> |
| <meta name="timeout" content="long"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/utils.js"></script> |
| <script src="/common/dispatcher/dispatcher.js"></script> |
| <script src="../resources/utils.js"></script> |
| <script src="resources/utils.js"></script> |
| |
| <body> |
| <script> |
| setup(() => assertSpeculationRulesIsSupported()); |
| |
| promise_test(async t => { |
| const uid1 = token(); |
| const uid2 = token(); |
| |
| // A promise to wait until a prerendered page writes data with the "prerender" |
| // key in the local storage. |
| const write_promise = new Promise((resolve, reject) => { |
| window.addEventListener("storage", event => { |
| if (event.key !== 'prerender') { |
| reject("wrong key"); |
| } else { |
| resolve(); |
| } |
| }, { once: true }); |
| }); |
| |
| const opt = {}; |
| const init_opt = {}; |
| const rule_extras = {'target_hint': getTargetHint()}; |
| |
| window.localStorage.setItem('initial', uid1); |
| const {exec} = await create_prerendered_page(t, opt, init_opt, rule_extras); |
| const result = await exec(uid2 => { |
| window.localStorage.setItem('prerender', uid2); |
| return window.localStorage.getItem('initial'); |
| }, [uid2]) |
| |
| // Start prerendering a page that attempts to access localStorage API. |
| assert_equals( |
| result, uid1, |
| 'prerendering page should be able to read from local storage'); |
| |
| await write_promise; |
| assert_equals( |
| window.localStorage.getItem('prerender'), uid2, |
| 'prerendering page should be able to write to local storage'); |
| }, 'prerendering page should be able to access local storage'); |
| </script> |