| <!doctype HTML> |
| |
| <style> |
| #container { |
| contain: style layout; |
| } |
| </style> |
| |
| <div id="parent"></div> |
| |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| |
| <script> |
| async_test((t) => { |
| async function runTest() { |
| let container = document.createElement("div"); |
| container.id = "container"; |
| assert_false(container.displayLock.locked, "initial context is unlocked"); |
| |
| let acquire_promise = container.displayLock.acquire({ timeout: Infinity }); |
| t.step(() => assert_true(container.displayLock.locked, "context before acquire finishes is locked")); |
| |
| await acquire_promise; |
| t.step(() => assert_true(container.displayLock.locked, "context after acquire finishes is locked")); |
| |
| document.getElementById("parent").appendChild(container); |
| |
| let update_promise = container.displayLock.update(); |
| t.step(() => assert_true(container.displayLock.locked, "context during update is locked")); |
| |
| await update_promise; |
| t.step(() => assert_true(container.displayLock.locked, "context after update is locked")); |
| |
| let commit_promise = container.displayLock.commit(); |
| t.step(() => assert_true(container.displayLock.locked, "context during commit is locked")); |
| |
| await commit_promise; |
| t.step(() => assert_false(container.displayLock.locked, "context after commit is unlocked")); |
| |
| t.done(); |
| } |
| |
| window.onload = function() { |
| requestAnimationFrame(() => requestAnimationFrame(runTest)); |
| }; |
| }, "locked attribute"); |
| </script> |
| |
