Pybuild: build time test requiring registration of entry point

[Ole Streicher <olebole@debian.org>]

Hi,

I have a package (sunpy) that in the latest registers an entry point for
another package (asdf):

[options.entry_points]
asdf_extensions =
  sunpy = sunpy.io.special.asdf.extension:SunpyExtension

This functionality is also used during some tests, which I would like to
keep.

However, pybuild runs the test before "setup.py install" is called, so
the extension is not there at this time. I would not like to disable the
test, since it checks some important functionality.

Is there a way to solve this?

Best regards

Ole