Unit Testing and Test Driven Development in Python

Took a practice for TDD method

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
.pytest_cache		.pytest_cache
.gitignore		.gitignore
README.md		README.md
requirements.txt		requirements.txt
test_checkout.py		test_checkout.py
test_doubles.py		test_doubles.py
test_ttd.py		test_ttd.py

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