fix: Respect name of @Custom* decorated defs

[maybe-sybr]

This change makes it easier to refer to @Custom* decorated classes programmatically.

[maybe-sybr]

This is a fairly minor change but if you need a CLA signed, let me know. Thanks!

[clenk]

Hi @maybe-sybr. Thank you for the submission, it's a good change. Would you mind fixing the unit tests though: https://travis-ci.org/github/oasis-open/cti-python-stix2/builds/712041095. If you're able to sign a CLA that would be awesome: https://www.oasis-open.org/resources/open-repositories/cla/individual-cla

Thanks again!

[codecov-commenter]

Codecov Report

Merging #439 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #439   +/-   ##
=======================================
  Coverage   98.38%   98.39%           
=======================================
  Files         130      131    +1     
  Lines       14906    14942   +36     
=======================================
+ Hits        14666    14702   +36     
  Misses        240      240           

Impacted Files	Coverage Δ
stix2/custom.py	100.00% <100.00%> (ø)
stix2/test/v20/test_custom.py	100.00% <100.00%> (ø)
stix2/test/v21/test_custom.py	100.00% <100.00%> (ø)
stix2/__init__.py	100.00% <0.00%> (ø)
stix2/test/v20/test_utils.py	100.00% <0.00%> (ø)
stix2/test/v21/test_utils.py	100.00% <0.00%> (ø)
stix2/serialization.py	94.73% <0.00%> (ø)
stix2/test/v21/test_datastore_filesystem.py	99.23% <0.00%> (+0.01%)	⬆️
stix2/test/v20/test_datastore_filesystem.py	99.21% <0.00%> (+0.01%)	⬆️
stix2/base.py	96.85% <0.00%> (+0.09%)	⬆️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bcd3eb3...1534452. Read the comment docs.

[maybe-sybr]

@clenk I've sent in a CLA, lmk if there are any issues. In the meantime, I've also fixed up those two unit tests which were failing and CI went green at https://travis-ci.org/github/oasis-open/cti-python-stix2/builds/712398792 .

I did notice that the class names were only explicitly referenced for CustomExtensions and more as a side-effect of another behavioural test. Is it at all useful to add tests specifically for properties of the derived class objects? Since we're not passing up things like __doc__ as well, we're still not really wrapping the decorated class properly, but that may also not be a thing we particularly care about.

[clenk]

Thanks, @maybe-sybr your CLA's on file. Yes, it would be useful to have tests for these properties specifically. Properly wrapping the decorated class and passing up all of the attributes hasn't been a priority for us but would be an improvement. We'd accept any pull requests to that end, though! :)