test-generator

Test Generator Skill

When to Use

• Creating new Python functions/modules
• After fixing bugs (add regression tests)
• Before refactoring

Test Structure

# test_[module].py
import pytest
from module import function

def test_function_success():
    result = function(input)
    assert result == expected

def test_function_edge_case():
    with pytest.raises(Exception):
        function(invalid_input)

Best Practices

• One assertion per test
• Test happy path + edge cases
• Use descriptive names: test_should_return_X_when_Y
• Mock external dependencies
• Fixtures for shared setup

Running Tests

pytest                    # All tests
pytest -x                 # Stop on first failure
pytest -k pattern         # Filter by name
pytest --cov=module        # Coverage