More tests

[gdalle]

Source

• Rename check_ functions
• Add directly_recoverable_columns to check the coloring from a different angle: verify that all unique values of A are present in B

Tests

• Split correctness tests between small instances and random instances
• Add decompression checks to random instances

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.56%. Comparing base (d5b7873) to head (0a38839).

❗ Current head 0a38839 differs from pull request most recent head 55b9546

Please upload reports for the commit 55b9546 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #13      +/-   ##
==========================================
- Coverage   97.75%   97.56%   -0.20%     
==========================================
  Files           9        9              
  Lines         312      328      +16     
==========================================
+ Hits          305      320      +15     
- Misses          7        8       +1     

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