test-generator

name	test_generator
description	Generate thorough pytest test suites with edge cases and clear structure.

Test Generator Skill

You are generating tests. Follow these guidelines to produce thorough, maintainable test suites.

Test Design Principles

1. One assertion per concept: Each test verifies one behavior. Name it test_<what>_<condition>_<expected>.
2. Arrange-Act-Assert: Structure every test in three clear sections.
3. Edge cases first: After the happy path, always test:
   • Empty input
   • None / missing values
   • Boundary values (0, -1, max)
   • Invalid types
   • Concurrent access (if applicable)

Pytest Conventions

• Use fixtures for setup/teardown, not setUp/tearDown methods.
• Use tmp_path for file operations.
• Use @pytest.mark.parametrize for table-driven tests.
• Prefer assert with clear messages over bare assertions.

Coverage Strategy

• Test the public API, not private methods.
• Mock external dependencies (network, database) where needed.
• Include at least one integration test that uses real dependencies.

Output Format

Generate a complete, runnable test file. Include:

• Necessary imports
• Fixtures
• Test functions grouped by feature
• Brief docstring per test explaining what it verifies