1721911 - browser_accessibility_fission_switch_target.js fails intermitently with server targets

Status: RESOLVED FIXED

(DevTools :: Accessibility Tools, defect)

Description

[Alexandre Poirot [:ochameau]]

This test fails intermitently. I reproduce locally with --run-until-failure.

It looks like the panel fails to emit the reloaded event.
From what I can see, in the following code, during a navigation:
https://searchfox.org/mozilla-central/rev/2022d34edd5817948b27f093cd203ae6adb18a25/devtools/client/accessibility/panel.js#185-189

    const onUpdated = this.panelWin.once(EVENTS.INITIALIZED);
    this.refresh();
    await onUpdated; // <<< === we are stuck here. No INITIALIZED event.

    this.emit("reloaded");

I have not dug this deeper.

Comment 1

[Nicolas Chevobbe [:nchevobbe]]

Attachment: Bug 1721911 - [devtools] Fix a11y inspector with server side target switch.r=ochameau.

Comment 2

[Nicolas Chevobbe [:nchevobbe]]

the issue was that the initialization code was running while the getFront("accessibility") Promise in onTargetAvailable wasn't settled, which would cause the getChildren method to return an empty array, and later down the road, to the EVENTS.INITIALIZED event to not be emitted.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d565380e0bba
[devtools] Fix a11y inspector with server side target switch.r=ochameau.

Comment 4

[Alexandru Michis [:malexandru]]

https://hg.mozilla.org/mozilla-central/rev/d565380e0bba