test-python-binding

oleh nvidia

Bangun dan uji binding Python NeMo Relay serta SDK plugin worker; gunakan untuk perubahan pada python/nemo_relay, python/plugin, atau crates/python

npx skills add https://github.com/nvidia/nemo-relay --skill test-python-binding

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Build And Test Python Binding

Companion Guidance

Use karpathy-guidelines alongside this skill for implementation or review work. Keep changes scoped, surface assumptions, and define focused validation before editing.

Use this skill when the change is primarily in python/nemo_relay, python/plugin, python/tests, crates/python, or Python-facing docs/examples.

Default Path

Format changed Python wrapper and test files with uv run ruff format python python/plugin.
Run focused pytest first when you know the affected area.
Run just test-python-plugin when the Python worker SDK changed.
Run the full Python suite with just test-python before review.
If any Rust files changed as part of the Python work, also run cargo fmt --all, just test-rust, and cargo clippy --workspace --all-targets -- -D warnings.
Use just build-python when you want an explicit build-only pass.
Use just build-python-plugin when the Python worker SDK changed.
If the native Rust bridge changed, add the Rust crate tests for nemo-relay-python.

Python Test Style

Pytest is used to run tests.
Do not add @pytest.mark.asyncio to any test. Async tests are automatically detected and run by the async runner; the decorator is unnecessary clutter.
Do not add a -> None return type annotation to test functions. This is not a common convention in pytest and adds unnecessary verbosity.
When mocking a class, do not define a new class. Use unittest.mock.MagicMock or unittest.mock.AsyncMock, with the spec constructor argument when necessary.
The name of the mocked class should be prefixed with mock, not fake.
Prefer pytest fixtures over helper methods.
Do not repeat fixtures, if a fixture is needed in multiple test files, place it in a conftest.py file.
When creating a fixture follow this pattern:
```
@pytest.fixture(name="<fixture_name>"[, scope="<scope>"])
def <fixture_name>_fixture() -> <return_type>:
    ...
```
Only specify the scope argument when the value is something other than "function".
Prefer pytest.mark.parametrize over creating individual tests for different input types.

Common Commands

# Focused test loop
uv run pytest -k "<pattern>"

# Required first for focused dynamic-plugin host tests
just build-test-plugin-fixtures
uv run pytest python/tests/test_dynamic_plugin_host.py

# Focused Python worker plugin SDK suite
just test-python-plugin

# Format Python files
uv run ruff format python python/plugin

# Full Python suite
just test-python

# Required when the Python change also touched Rust code
cargo fmt --all
just test-rust
cargo clippy --workspace --all-targets -- -D warnings

# Rebuild the editable package plus native extension
just build-python

# Rebuild/install the Python worker plugin SDK
just build-python-plugin

# Native extension crate when crates/python changed
cargo test -p nemo-relay-python

When To Escalate

If crates/core, crates/adaptive, or shared runtime semantics changed, also use validate-change.
If python/plugin or worker protocol behavior changed, also use maintain-dynamic-plugins.
If the change is actually about docs only, prefer contribute-docs plus targeted command checks.