🧪 Improve test coverage for utilities.split() edge cases

[tjzegmott]

🎯 What:
Added a guard in utilities.split() to raise ValueError on zero or negative counts, preventing ZeroDivisionError. Added edge case tests in test_utils.py to cover these scenarios.

📊 Coverage:

• Test with empty list to ensure empty chunks are returned.
• Test with count=0 to ensure ValueError is raised.
• Test with count=-1 to ensure ValueError is raised.

✨ Result:
The test coverage of utilities.split() was improved and now includes verification of critical edge cases that could previously trigger a ZeroDivisionError.

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PR created automatically by Jules for task 599810441351711448 started by @tjzegmott

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[Copilot]

Pull request overview

This PR hardens dtcli.utilities.utilities.split() against invalid count values by raising a clear ValueError instead of allowing runtime failures, and adds targeted tests to cover edge cases.

Changes:

• Add an input guard in utilities.split() to raise ValueError when count <= 0.
• Add tests for empty input and invalid count values (0, -1) to improve coverage of split() edge cases.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
dtcli/utilities/utilities.py	Adds validation to prevent invalid count values from reaching the batching math.
tests/test_utils.py	Adds pytest-based edge case tests covering empty input and invalid count values.

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[coveralls]

coverage: 65.594% (+0.2%) from 65.371% — improve-utilities-split-tests-599810441351711448 into main

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.59%. Comparing base (c0921ec) to head (e951364).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #155      +/-   ##
==========================================
+ Coverage   65.37%   65.59%   +0.22%     
==========================================
  Files          15       15              
  Lines        1389     1398       +9     
==========================================
+ Hits          908      917       +9     
  Misses        481      481              

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[coveralls]

coverage: 65.594% (+0.2%) from 65.371% — improve-utilities-split-tests-599810441351711448 into main