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author | Joyee Cheung <joyeec9h3@gmail.com> | 2019-01-22 02:29:21 +0800 |
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committer | Joyee Cheung <joyeec9h3@gmail.com> | 2019-01-25 00:12:11 +0800 |
commit | d20f5c7f1b3b79f11b99b6599c3ddea8dfd39a60 (patch) | |
tree | 0627f956e4050c3fdd3be7c04efac0e9a7566878 /test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js | |
parent | d40ed71c1136c4a1c93ed5fe16bf6e3f9ca7631d (diff) | |
download | android-node-v8-d20f5c7f1b3b79f11b99b6599c3ddea8dfd39a60.tar.gz android-node-v8-d20f5c7f1b3b79f11b99b6599c3ddea8dfd39a60.tar.bz2 android-node-v8-d20f5c7f1b3b79f11b99b6599c3ddea8dfd39a60.zip |
test: pull html/webappapis/microtask-queuing WPT
With the command:
```
git node wpt html/webappapis/microtask-queuing
```
PR-URL: https://github.com/nodejs/node/pull/25616
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Diffstat (limited to 'test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js')
-rw-r--r-- | test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js b/test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js new file mode 100644 index 0000000000..78cdcfc5d9 --- /dev/null +++ b/test/fixtures/wpt/html/webappapis/microtask-queuing/queue-microtask.window.js @@ -0,0 +1,45 @@ +"use strict"; + +// This does not work as you expect because mutation observer compound microtasks are confusing. +// Basically you can only use it once per test. +function queueMicrotaskViaMO(cb) { + const observer = new MutationObserver(cb); + const node = document.createTextNode(""); + observer.observe(node, { characterData: true }); + node.data = "foo"; +} + +// Need to use promise_test to get sequential ordering; otherwise the global mutation observer +// compound microtask business screws us over. + +promise_test(() => { + return new Promise(resolve => { + const happenings = []; + + queueMicrotaskViaMO(() => happenings.push("x")); + queueMicrotask(() => happenings.push("a")); + + queueMicrotask(() => { + assert_array_equals(happenings, ["x", "a"]); + resolve(); + }); + }); +}, "It interleaves with MutationObservers as expected"); + +promise_test(() => { + return new Promise(resolve => { + const happenings = []; + + queueMicrotask(() => happenings.push("a")); + Promise.reject().catch(() => happenings.push("x")); + queueMicrotaskViaMO(() => happenings.push(1)); + Promise.resolve().then(() => happenings.push("y")); + queueMicrotask(() => happenings.push("b")); + queueMicrotask(() => happenings.push("c")); + + queueMicrotask(() => { + assert_array_equals(happenings, ["a", "x", 1, "y", "b", "c"]); + resolve(); + }); + }); +}, "It interleaves with MutationObservers and promises together as expected"); |