Fix interacting with an element inside nested IFrames

[bandorko]

What?

Page.getFrameElement now finds the root frame. Only the root frame has a FrameSession.

Why?

With k6 v0.47.0 github.com/grafana/xk6-browser@v1.1.0/common/page.go:274 panicked because the parent session was nil.

Checklist

• I have performed a self-review of my code
• I have added tests for my changes
• I have commented on my code, particularly in hard-to-understand areas

Related PR(s)/Issue(s)

Closes: #1087

[CLAassistant]

All committers have signed the CLA.

[ahlstro]

We would very much like this fix to be merged in the next release because as of now our test-script for our customer's behalf cannot run fully to the end. Thank you kindly.

[ankur22]

Thanks for the fix! LGTM.

Just one request, which is to tidy up the test.

EDIT: Can you please squash the two commits which are related to the test.

[inancgumus]

LGTM 👍 Thanks for this 🙇 Can you also rename the first commit to: Fix getFrameElement to find root frame? One more suggestion below.

[ankur22]

Great work! 🎉

[inancgumus]

Thanks for this 🙇 Please remember to rename the first commit to: Fix getFrameElement to find root frame.

[ankur22]

@bandorko I've amended the commit message that @inancgumus was suggesting. I'll be merging this change in once the CI pipeline passes.