test_schemaview.py: restore range tests

[ialarmedalien]

Thanks to git's incomparable diff / merge algorithm, the tests I added for range functions got lost in the commit after they were merged to main.

This PR cherry-picks the three commits that originally formed the range tests to restore them to their full glory. Since the code block in question was contiguous, the cherry-picked pieces plopped cleanly back into the test file without conflicts.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.59%. Comparing base (9bfff4d) to head (c24ed99).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #470      +/-   ##
==========================================
+ Coverage   77.48%   77.59%   +0.11%     
==========================================
  Files          52       52              
  Lines        4459     4459              
  Branches      968      968              
==========================================
+ Hits         3455     3460       +5     
+ Misses        781      778       -3     
+ Partials      223      221       -2     

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[dalito]

Good that the code is back! Such large diffs as in #456 are really difficult to review in the GH UI.

[ialarmedalien]

Thank you for the quick review @dalito!