Test creation

Natural invoke

• "Add tests for projects/templates/template_code_project/src/optimizer.py"
• "Raise coverage on infrastructure/validation to pass 60% gate"
• "Test this CLI with subprocess, no mocks"

Inputs to confirm

• Code under test — module/path.
• Layer — infrastructure (60%) vs project (90%).

Workflow

1. No mocks — never unittest.mock, MagicMock, or patch the unit under test. Use real computation, tmp_path, local HTTP servers, subprocess for CLIs.

1. Structure — test_*.py mirroring src modules; parametrize variants; fixed RNG seeds.

1. Coverage — run pytest-cov; meet floor for layer.

1. Integration — wire into projects/<n>/tests/ or tests/infra_tests/ following existing layout.

Deliverables

• Test file(s) with passing run and coverage report excerpt
• Note any opt-in markers (requires_latex, requires_ollama)

Verification commands

bash
uv run pytest path/to/test_file.py -v
uv run pytest projects/<project>/tests/ --cov=projects/<project>/src --cov-fail-under=90
uv run pytest tests/infra_tests/path/ --cov=infrastructure --cov-fail-under=60

When NOT to use

• Implement feature + tests together → feature-addition or code-development

References

• docs/rules/testing_standards.md
• Patterns: references/patterns.md