# Test environment

## Setup

Create a venv at the repo root and install the root dev extras plus the
packages exercised by the tests you're running:

```bash
# Linux/macOS
python3 -m venv .venv
.venv/bin/pip install -e ".[dev]"
.venv/bin/pip install -e packages/node -e packages/tracker -e packages/gateway
```

```powershell
# Windows (native, no WSL)
python -m venv .venv
.venv\Scripts\python.exe -m pip install -e ".[dev]"
.venv\Scripts\python.exe -m pip install -e packages\node -e packages\tracker -e packages\gateway
```

`conftest.py` at the repo root adds every `packages/*` source directory to
`sys.path`, so tests can `import meshnet_node`, `import meshnet_tracker`, etc.
without an editable install. That only resolves first-party modules, though —
each package's own third-party dependencies (e.g. `cryptography` for
`meshnet_node.wallet` and `meshnet_tracker.wallet_proof`) still need to be
installed in the venv, either via `pip install -e packages/<pkg>` or by
depending on the root `dev` extra covering them.

`cryptography>=41` is declared in `packages/node/pyproject.toml` (and
`packages/p2p/pyproject.toml`) and is also pulled in by the root `dev` extra,
so `pip install -e ".[dev]"` alone is enough to run the wallet-related tests
even without installing `packages/node`.

## Running tests

```bash
.venv/bin/python -m pytest
```

## Optional-dependency tests

Some tests import heavyweight or optional third-party packages and guard
themselves with `pytest.importorskip(...)` — they skip cleanly if the
dependency isn't installed:

- `tests/test_real_model_backend.py` — `torch`, `transformers`, `safetensors`,
  `accelerate`, `bitsandbytes`
- `tests/test_devnet_treasury.py` — `solders`, `spl.token.instructions`

`tests/test_openai_gateway.py` is the exception: it imports `openai` and
`langchain_openai` directly inside test functions with no `importorskip`
guard, so it hard-fails if those aren't installed. They're included in the
root `dev` extra, so a normal `pip install -e ".[dev]"` covers it. If you
deliberately install a minimal environment without the `dev` extra, skip it
explicitly:

```bash
.venv/bin/python -m pytest --ignore=tests/test_openai_gateway.py
```