Tests for formato_csv.py module

[ABHISHEKSONI121]

Test Suite Summary for formatos_csv Module

Key Achievements

• All 16 tests passing
• Comprehensive testing for leer, aplanar, desaplanar, and escribir functions
• Covers both CSV and XLSX file handling
• Includes edge cases and multiple record scenarios

Manual test evidence

Checklist

• Classes, Variables, function and methods logic ok
• Comments written explaining what the code does
• All python code is PEP8 compliant (run black .)
• No lint issues (run flake8)
• Test coverage with pytest implemented
• Reviewers assigned (at least 1 mentor)

Improvements

• Increase coverage to >90%
• Add more edge case tests

🔗 Related Issues

Closes #161: Improve test coverage for formatos_csv module

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💡 This test suite provides a robust foundation for the formatos_csv module. Regular updates are recommended to maintain high code quality and reliability.