turned on some commented out test code

[edwardhartnett]

Some test code was commented out, due to old debugging.

This PR uncomments some extra test code.

[edwardhartnett]

This is failing like this:

4s
Run autoreconf -if
aclocal: warning: couldn't open directory 'm4': No such file or directory
glibtoolize:   error: One of these is required:
glibtoolize:                 gm4 gnum4 m4
glibtoolize:   error: Please install GNU M4, or 'export M4=/path/to/gnu/m4'.
autoreconf: error: glibtoolize failed with exit status: [1](https://github.com/Unidata/netcdf-c/actions/runs/10596262224/job/29364409132?pr=2993#step:15:1)
Error: Process completed with exit code 1.

So nothing to do with my changes.

[WardF]

Thanks, Ed. What in the world, I'll track it down.