test(extractor): added tests for zst and pkg package extractors

[yashugarg]

fixes #1682

[codecov-commenter]

Codecov Report

Merging #1683 (cce72e1) into main (fc12dc4) will increase coverage by 0.82%.
The diff coverage is 78.35%.

@@            Coverage Diff             @@
##             main    #1683      +/-   ##
==========================================
+ Coverage   78.55%   79.38%   +0.82%     
==========================================
  Files         299      299              
  Lines        6222     6311      +89     
  Branches     1012     1033      +21     
==========================================
+ Hits         4888     5010     +122     
+ Misses       1116     1083      -33     
  Partials      218      218              

Flag	Coverage Δ
longtests	79.38% <78.35%> (+0.82%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cve_bin_tool/extractor.py	58.53% <9.09%> (+4.49%)	⬆️
cve_bin_tool/cvedb.py	71.88% <20.00%> (-0.65%)	⬇️
cve_bin_tool/cli.py	69.29% <30.00%> (-1.21%)	⬇️
cve_bin_tool/helper_script.py	85.32% <100.00%> (+26.49%)	⬆️
test/test_extractor.py	100.00% <100.00%> (ø)
test/test_helper_script.py	100.00% <100.00%> (ø)
test/utils.py	94.28% <100.00%> (+0.73%)	⬆️
cve_bin_tool/nvd_api.py	75.20% <0.00%> (-8.80%)	⬇️
cve_bin_tool/util.py	78.37% <0.00%> (+2.70%)	⬆️
... and 2 more

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[BreadGenie]

LGTM!
The PR title can be changed to test(extractor) instead of test: extractor

[terriko]

Re-running the windows tests. It might be time to up the limit on windows tests again since these seem to be failing more frequently than they used to. I'll put a tag on this so hopefully I'll come back to it later.

[terriko]

Caused a merge conflict with the 7z improvement. I think I've resolved it through the web interface, but we'll see if the black linter disagrees.

[terriko]

The conflict resolved without breaking the linters. hurrah!

Thanks for sorting out the tests! I'll get this merged now.