pytest-funcnodes

pytest_funcnodes is the maintained pytest plugin for FuncNodes modules. It replaces the legacy TestAllNodesBase harness by supplying decorators, fixtures, and coverage helpers that keep the runtime isolated and guarantee every node is exercised.

Key Features

• @pytest_funcnodes.nodetest Marks async node tests, injects pytest.mark.asyncio, and records which node classes were covered. Every test that executes a node must use this decorator so the plugin can reset registries and track coverage.

• @pytest_funcnodes.funcnodes_test Wraps sync or async tests that interact with funcnodes_core / funcnodes state (loading shelves, running flows, tweaking config). It toggles the same isolated test_context used for node tests, disabling file loggers and pointing configs at a per-test temp directory.

• Autouse fixtures & CLI flag The plugin ships nodetest_setup_teardown / funcnodes_test_setup_teardown fixtures plus --nodetests-only, letting you run just node suites while keeping isolation guarantees.

• Coverage helper pytest_funcnodes.all_nodes_tested(all_nodes, shelf, ignore=...) flattens shelves and asserts that every exported node class was covered by a @nodetest.

Installation

uv add pytest-funcnodes
# or
pip install pytest_funcnodes

Usage

1. Mark node tests

import pytest_funcnodes
import funcnodes as fn

@fn.NodeDecorator("demo.concat")
def concat(a: str, b: str) -> str:
    return a + b

@pytest_funcnodes.nodetest(concat)
async def test_concat():
    node = concat()
    node["a"] = "foo"
    node["b"] = "bar"
    await node
    assert node["out"].value == "foobar"

2. Mark runtime/integration tests

import pytest_funcnodes
from funcnodes_core import config as fnconfig

@pytest_funcnodes.funcnodes_test
def test_config_uses_temp_dir():
    cfg_dir = fnconfig.get_config_dir()
    assert cfg_dir.name.startswith("funcnodes_test_")

3. Enforce shelf coverage

from pytest_funcnodes import all_nodes_tested
import funcnodes_basic as fnmodule

def test_all_nodes_tested(all_nodes):
    all_nodes_tested(all_nodes, fnmodule.NODE_SHELF, ignore=[])

This assertion fails with a list of missing node classes if any exported node lacks a @nodetest.

4. CLI workflow

• pytest --nodetests-only filters the run down to node suites.
• The session fixture prints Session fixture setup/teardown, confirming the plugin activated.
• No manual calls to funcnodes_core.testing.setup() / teardown() are required—the fixtures enter and exit test_context automatically.

Runtime Isolation Details

test_context (see pytest_funcnodes/testingsystem.py) rewrites the FuncNodes config directory into a temp folder per PID, clears leftovers between tests, disables file handlers, upgrades selected warnings (e.g., FuncNodesDeprecationWarning) to errors, and removes the temp directory on exit. This means:

• Tests never leak global registry state (funcnodes_core.node.REGISTERED_NODES is cleared after each run).
• File logs stay inside the temp dir and are removed after teardown.
• Fail-fast behavior surfaces deprecated APIs that still fire warnings.

Always prefer the provided decorators over manual setup so these safeguards remain effective.