1310346 - [e10s-multi] RDM browser_toolbox_swap_browsers.js test failures

Status: RESOLVED FIXED

(DevTools :: Responsive Design Mode, defect)

Description

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

With e10s multi, there are some test failures in browser_toolbox_swap_browsers.js.

STR:

./mach mochitest devtools/client/responsive.html/test/browser/browser_toolbox_swap_browsers.js --setpref dom.ipc.processCount=10

Comment 1

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Attachment: Bug 1310346 - Fix RDM browser_toolbox_swap_browsers.js for e10s-multi.

Review commit: https://reviewboard.mozilla.org/r/86142/diff/#index_header
See other reviews: https://reviewboard.mozilla.org/r/86142/

Comment 2

[Alexandre Poirot [:ochameau]]

Comment on attachment 8801389 [details]
Bug 1310346 - Fix RDM browser_toolbox_swap_browsers.js for e10s-multi.

https://reviewboard.mozilla.org/r/86142/#review85116

::: devtools/client/responsive.html/test/browser/browser_toolbox_swap_browsers.js:45
(Diff revision 1)
> +      "0: No DevTools connections yet");
>      let { toolbox } = yield openInspector();
> -    // 2: One for each tab (starting tab plus the one we opened).  Only one truly needed,
> -    //    but calling listTabs will create one for each tab.  `registerTestActor` calls
> -    //    this, triggering the extra tab's actor to be made.
> -    yield checkServerConnectionCount(tab.linkedBrowser, 2);
> +    if (E10S_MULTI_ENABLED) {
> +      // 1: Two tabs open, but only one per content process.  Only one truly
> +      //    needed, but calling listTabs will create one for each tab.
> +      //    `registerTestActor` calls this, triggering the extra tab's actor to be made.

I don't follow this comment.
It starts by saying there is only one, but then, it seems to say there could be more?

::: devtools/client/responsive.html/test/browser/browser_toolbox_swap_browsers.js:51
(Diff revision 1)
> +      yield checkServerConnectionCount(tab.linkedBrowser, 1,
> +        "1: Two tabs open, but only one per content process");
> +    } else {
> +      // 2: One for each tab (starting tab plus the one we opened).  Only one truly
> +      //    needed, but calling listTabs will create one for each tab.
> +      //    `registerTestActor` calls this, triggering the extra tab's actor to be made.

I totally understand these comments if you keep only the first sentence.

::: devtools/client/responsive.html/test/browser/browser_toolbox_swap_browsers.js:62
(Diff revision 1)
> +    if (E10S_MULTI_ENABLED) {
> +      // 2: RDM UI uses an extra connection
> +      yield checkServerConnectionCount(ui.getViewportBrowser(), 2,
> +        "2: RDM UI uses an extra connection");
> +    } else {
> -    // 3: RDM UI uses an extra connection
> +      // 3: RDM UI uses an extra connection

Instead of duplicating the comment, it would be great to say why it doesn't use an extra connection in e10s

::: devtools/client/responsive.html/test/browser/browser_toolbox_swap_browsers.js:103
(Diff revision 1)
> +      yield checkServerConnectionCount(ui.getViewportBrowser(), 2,
> +        "2: Two tabs open, but only one per content process");
> +    } else {
> +      // 3: One for each tab (starting tab plus the one we opened).  Only one truly
> +      //    needed, but calling listTabs will create one for each tab.
> +      //    `registerTestActor` calls this, triggering the extra tab's actor to be made.

Same thing here, I would keep only the first sentence in both if/else comments.

Comment 3

[Alexandre Poirot [:ochameau]]

Comment on attachment 8801389 [details]
Bug 1310346 - Fix RDM browser_toolbox_swap_browsers.js for e10s-multi.

https://reviewboard.mozilla.org/r/86142/#review85120

Comment 4

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Comment on attachment 8801389 [details]
Bug 1310346 - Fix RDM browser_toolbox_swap_browsers.js for e10s-multi.

https://reviewboard.mozilla.org/r/86142/#review85116

Okay, I've tried to clarify the comments.  Thanks for the review!

> I don't follow this comment.
> It starts by saying there is only one, but then, it seems to say there could be more?

Okay, I'll chop it down to just the first sentence...  It's a bit tricky to explain clearly.  We're checking the connection count of a specific process, so even though we've triggered connections for all open tabs, only some are counted since we don't ask every process.

Comment 5

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Comment on attachment 8801389 [details]
Bug 1310346 - Fix RDM browser_toolbox_swap_browsers.js for e10s-multi.

Review request updated; see interdiff: https://reviewboard.mozilla.org/r/86142/diff/1-2/

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ff86d2b6fb5f
Fix RDM browser_toolbox_swap_browsers.js for e10s-multi. r=ochameau

Comment 7

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/ff86d2b6fb5f