so far, only the legacy style equivalent was tested. We have changed this
to current style. Legacy is no longer tested to keep CI runtime low.
The new test also has been made more reliable than the previous one.
Also now permit interactivly running tests without explicitly setting
$srcdir. This now works if we are inside ./tests and fails, as before,
when we are in a different directory.
Detected by shellcheck via CodeFactor.io
changes some of the test commands to use bash functions
includes some small bug fixes to tests where bugs were
previously not seen due to different plumbing.
