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Diffstat (limited to 'testing/web-platform/tests/html/webappapis/scripting/event-loops/task_microtask_ordering.html')
-rw-r--r-- | testing/web-platform/tests/html/webappapis/scripting/event-loops/task_microtask_ordering.html | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/scripting/event-loops/task_microtask_ordering.html b/testing/web-platform/tests/html/webappapis/scripting/event-loops/task_microtask_ordering.html new file mode 100644 index 0000000000..c14a043b6a --- /dev/null +++ b/testing/web-platform/tests/html/webappapis/scripting/event-loops/task_microtask_ordering.html @@ -0,0 +1,85 @@ +<!DOCTYPE html> +<title>Task and Microtask Ordering </title> +<link rel=author title="Joshua Bell" href="mailto:jsbell@google.com"> +<link rel=help href="https://html.spec.whatwg.org/multipage/#event-loops"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/common.js"></script> + +<div class="outer"> + <div class="inner"></div> +</div> + +<script> + +// Based on: https://jakearchibald.com/2015/tasks-microtasks-queues-and-schedules/ + +log_test(function(t, log) { + log('script start'); + + setTimeout(function() { + log('setTimeout'); + }, 0); + + Promise.resolve().then(function() { + log('promise1'); + }).then(function() { + log('promise2'); + }); + + log('script end'); +}, [ + 'script start', + 'script end', + 'promise1', + 'promise2', + 'setTimeout' +], 'Basic task and microtask ordering'); + +log_test(function(t, log) { + // Let's get hold of those elements + var outer = document.querySelector('.outer'); + var inner = document.querySelector('.inner'); + + // Let's listen for attribute changes on the + // outer element + new MutationObserver(function() { + log('mutate'); + }).observe(outer, { + attributes: true + }); + + // Here's a click listener... + function onClick() { + log('click'); + + setTimeout(function() { + log('timeout'); + }, 0); + + Promise.resolve().then(function() { + log('promise'); + }); + + outer.setAttribute('data-random', Math.random()); + } + + // ...which we'll attach to both elements + inner.addEventListener('click', onClick); + outer.addEventListener('click', onClick); + + // Note that this will behave differently than a real click, + // since the dispatch is synchronous and microtasks will not + // run between event bubbling steps. + inner.click(); +}, [ + 'click', + 'click', + 'promise', + 'mutate', + 'promise', + 'timeout', + 'timeout' +], 'Level 1 bossfight (synthetic click)'); + +</script> |