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grm/.devin/skills/testing-and-debugging/SKILL.md
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# testing-and-debugging
Make targets for testing, debugging, and CI investigation. **Use these
instead of raw `pytest`, `ruff`, or `molecule` commands.**
## Why Make Targets
Make targets encapsulate the correct venv activation, PYTHONPATH, env
vars, and flags. Running raw commands bypasses venv activation and
produces false failures (missing dependencies, wrong Python version).
## Unit Tests
| Task | Command | Notes |
|------|---------|-------|
| Run all unit tests | `make test-unit` | Fast, no coverage |
| Run with coverage | `make pytest-cov` | **Required before push** — enforces 100% |
| Run single test | `make pytest-cov TEST=tests/test_foo.py::test_bar` | |
## Linting
| Task | Command | Notes |
|------|---------|-------|
| Full lint | `make lint-all` | ruff + pyright + bandit + ansible-lint + checkmake + actionlint |
| Ruff only | `make lint-ruff` | |
| Type check | `make typecheck` | pyright |
| Bandit | `make lint-bandit` | Security linter |
| Workflow lint | `make workflow-check` | actionlint + act_runner dry-run |
## Molecule Tests
| Task | Command | Notes |
|------|---------|-------|
| All scenarios | `make molecule` | All 6 scenarios on Ubuntu 22.04 |
| All platforms | `make molecule-all` | All 6 scenarios on all 4 OSes |
| Parallel | `make molecule-all-parallel` | MOLECULE_JOBS=4 |
### Spec-Driven Workflow
Every PR requires a spec file at `docs/specs/<TASK-ID>.md`. See the
`spec-driven-development` skill for the full workflow and template.
CI validates the spec before running expensive jobs.
## Pre-Push Verification
**Before pushing any branch:**
```bash
make pre-push
```
This runs `lint-all` + `pytest-cov`. The pre-push git hook only
validates the Vikunja task exists — it does NOT run tests. You must
run `make pre-push` manually.
## CI Failure Investigation
When investigating a CI failure:
1. **Fetch logs via MCP** — use `mcp_call_tool` with gitea server,
`actions_run_read` method, `download_job_log` tool
2. **Reproduce locally** — use `make pytest-cov` or `make lint-ci`
depending on which CI job failed
3. **Never run raw pytest** — always use the make target
## Virtual Environment
All commands run inside `.venv`. `make` targets handle activation
automatically. For raw commands (rare), activate first:
```bash
source activate.sh # bash/zsh
source activate.fish # fish
source activate.zsh # zsh
```
If `.venv` doesn't exist, run `make setup` first.
## Common Pitfalls
### Coverage Verification Before Push
**Always run `make pytest-cov` before pushing** — CI enforces 100%
coverage and will fail the PR if any lines are uncovered. This is the
most common cause of CI validate job failures after code changes. The
pre-push git hook only validates Vikunja task existence, not tests.
### API Response Type Checking
Never use `is True`/`is False` identity checks on API response values.
Many APIs return boolean values as strings (`"true"`/`"false"`). Use
string comparison or truthy/falsy helpers instead.
### Time Mocking in Tests
Always mock `time.sleep` and `time.monotonic` in unit tests using
`@patch` decorators. Real sleep calls make tests slow and exceed test
speed limits.