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Ruff: Stop AI Code Complexity Before It Hits Production
Problem:
AI agents often create overengineered code with multiple nested if/else and try/except blocks, increasing technical debt and making functions difficult to test.
However, it is time-consuming to check each function manually.
Solution:
Ruff’s C901 complexity check automatically flags overly complex functions before they enter your codebase.
This tool counts decision points (if/else, loops) that create multiple execution paths in your code.
Key benefits:
- Automatic detection of complex functions during development
- Configurable complexity thresholds for your team standards
- Integration with pre-commit hooks for automated validation
- Clear error messages showing exact complexity scores
No more manual code reviews to catch overengineered functions.
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Build Debuggable Tests: One Assertion Per Function
Problem:
Tests with multiple assertions make debugging harder.
When a test fails, you can’t tell which assertion broke without examining the code.
Solution:
Create multiple specific test functions for different scenarios of the same function.
Follow these practices for focused test functions:
- One assertion per test function for clear failure points
- Use descriptive test names that explain the expected behavior
- Maintain consistent naming patterns across your test suite
This approach makes your test suite more maintainable and failures easier to diagnose.
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