Address flaky test case scroll-into-view-and-show-validation-message.html when run using WK1

[stwrt]

06b95d5

Address flaky test case scroll-into-view-and-show-validation-message.html when run using WK1
https://bugs.webkit.org/show_bug.cgi?id=240875

Reviewed by Wenson Hsieh.

Address failing test case fast/forms/scroll-into-view-and-show-validation-message.html
when run using WK1. This test only fails when running WK1 and only when run
in parallel.

* LayoutTests/fast/forms/textarea-scrolled-endline-caret.html:
* LayoutTests/platform/mac-wk1/TestExpectations:

Canonical link: https://commits.webkit.org/250998@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294868 268f45cc-cd09-0410-ab3c-d52691b4dbfc

[whsieh]

It seems what you're waiting for here is the next rendering update?

There's a helper method, UIHelper.renderingUpdate(), in ui-helper.js that you might find useful here:

UIHelper.renderingUpdate().then(() => {
    eventSender.mouseMoveTo(90, 20);
    eventSender.mouseDown();
    eventSender.mouseUp();
    if (ta.selectionEnd == 17)
        res.innerHTML = "Test Succeeded";
    else
        res.innerHTML = "Test Failed: caret is at " + ta.selectionEnd;
    testRunner.notifyDone();
});

(or, if you want to make this an async function):

await UIHelper.renderingUpdate();
eventSender.mouseMoveTo(90, 20);
eventSender.mouseDown();
eventSender.mouseUp();
if (ta.selectionEnd == 17)
    res.innerHTML = "Test Succeeded";
else
    res.innerHTML = "Test Failed: caret is at " + ta.selectionEnd;
testRunner.notifyDone();

[stwrt]

Thanks, I'll take a look into this.

[whsieh]

This is what I had in mind:

https://gist.github.com/whsieh/0d3201cab31ac31ff4643c0faaefa8f5

[webkit-early-warning-system]

Committed r294868 (250998@main): https://commits.webkit.org/250998@main

Reviewed commits have been landed. Closing PR #977 and removing active labels.