1725350 - Test helper to ignore grid updates rejections on reflow

Status: RESOLVED FIXED

(DevTools :: Inspector, task)

Description

[Hubert Boma Manilla (:bomsy)]

There a certain situations where grid updates are triggered by reflows. These have in certain unexpected situations caused intermittents. A solution used in some tests are to turn off listening to reflow events See https://searchfox.org/mozilla-central/rev/3a8091d1c29473a0839ad7a5810028f41363fe2e/devtools/client/inspector/grids/test/browser_grids_grid-outline-highlight-area.js#40

As this is likely needed in more tests, lets provide a shared helper and possibly a better way to handle it

Comment 1

[Hubert Boma Manilla (:bomsy)]

Suggestion from slack discussions

function disableGridPanelUpdateOnReflow() {
  const { PromiseTestUtils } = ChromeUtils.import(
    "resource://testing-common/PromiseTestUtils.jsm"
  );
  const removeRejectionException = PromiseTestUtils.allowMatchingRejectionsGlobally("getGrids);
  registerCleanupFunction(removeRejectionException);
}

Comment 2

[Hubert Boma Manilla (:bomsy)]

Attachment: Bug 1725350 - [devtools] Add test helper to stop grid panel updates on reflow r=nchevobbe

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4e68ab5359b8
[devtools] Add test helper to stop grid panel updates on reflow r=nchevobbe

Comment 4

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/4e68ab5359b8