test: wait on files to load after dropping superuser

[jelly]

This part of the test flaked in that it didn't change directory to /etc/. A likely cause is that drop_superuser() does not wait on the page to fully load so the b.go() never registered in cockpit-files.

[jelly]

No flakes except, sorting. I'll do some thinking on how to solve that one.

[jelly]

        m.execute(f"""
        chmod 6755 {basedir}/eee
        chmod 0755 {basedir}/Eee
        chmod 1700 {basedir}/BBB
        chmod 3700 {basedir}/aaa
        chmod 0701 {basedir}/ccc
        """)

So for the testSorting failure, the screenshot shows a different list then what was checked before. So my reasoning is that we are either missing inotify events or something else?

[martinpitt]

Cheers! (of course fine to handle testSorting separately)