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Implement comprehensive unit tests and testing infrastructure for Flask applications using TDD and the unittest framework, as requested in AP-15.


Linear Issue: AP-15

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Implements TDD approach with unittest framework as requested in AP-15.

Changes:
- Add test_app.py with comprehensive unit tests for both Flask applications
- Tests cover Flask routes, Redis integration, error handling, and edge cases
- Update requirements.txt with testing dependencies (pytest, pytest-flask, pytest-mock)
- Create TESTING.md with comprehensive testing documentation
- Include 11 test methods covering happy paths and error scenarios
- Use mocking to isolate components and avoid external dependencies

Test coverage includes:
- Successful requests with working Redis
- Redis connection failures and error handling
- Environment variable configuration
- Counter increment behavior
- Hostname display
- Input sanitization
- Integration test scenarios
Add supporting files for running and validating unit tests:
- Dockerfile.test for both apps to run tests in isolated containers
- validate_tests.py script to verify test file structure and syntax
- Enables testing without local Python environment setup

Validation script checks:
- Syntax validity
- Test class and method presence
- Required imports
- Docstring coverage
- Mock usage for isolation
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cursor bot commented Jan 13, 2026

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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3 participants