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Two things stopped the engine commanding this house. ConnectorNode hardwired its node function to a no-op, so an input message reaching a connector was discarded and Art-Net's packet builder was unreachable; write() now carries the input ports, which is additive so the contract version holds. And the MQTT publisher JSON-encoded every payload, so "ON" went on the wire quoted and the devices on a shared broker, which speak bare values, ignored it. seed_house_control.py is the rig: a flow that drives the washing machine plug, a dimmer and a colour fixture over MQTT, carries the same two as DMX on an Art-Net node with transmit still off, and a dashboard to drive it by hand.
92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
"""The outbound nodes reuse one connection instead of opening one per message."""
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import asyncio
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from app.flow.messages import DType, MessageSpec
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from app.flow.nodes import MqttNode
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from app.flow.nodes.http import close_shared_client, shared_client
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def test_http_senders_share_one_pooled_client():
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first = shared_client()
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try:
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assert shared_client() is first
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finally:
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close_shared_client()
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# Closing lets the next request build a fresh one rather than reusing a
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# closed pool.
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assert shared_client() is not first
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close_shared_client()
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def _publisher() -> MqttNode:
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node = MqttNode(
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requires=[MessageSpec(name="setpoint", port="setpoint", dtype=DType.FLOAT)],
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params={"topic": {"setpoint": "heating/setpoint"}},
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)
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node.assign_flow("heating", "out")
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return node
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def test_a_started_publisher_queues_instead_of_connecting():
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"""The handler runs on a worker thread; it must not block on the broker."""
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node = _publisher()
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async def scenario() -> None:
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node._publish_queue = asyncio.Queue(maxsize=4)
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node._loop = asyncio.get_running_loop()
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await asyncio.to_thread(node._publisher_handler, {}, setpoint=21.0)
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# call_soon_threadsafe lands on the next loop pass.
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await asyncio.sleep(0)
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assert node._publish_queue.qsize() == 1
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assert node._publish_queue.get_nowait() == {"setpoint": 21.0}
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asyncio.run(scenario())
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def test_a_full_publish_queue_drops_the_oldest():
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"""A broker that cannot keep up must not grow the queue without bound."""
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node = _publisher()
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health: list[tuple[str, str | None]] = []
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node._on_health = lambda _n, status, detail: health.append((status, detail))
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async def scenario() -> None:
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queue: asyncio.Queue[dict] = asyncio.Queue(maxsize=2)
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for value in (1.0, 2.0, 3.0):
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node._enqueue(queue, {"setpoint": value})
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assert queue.qsize() == 2
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assert queue.get_nowait() == {"setpoint": 2.0}
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assert queue.get_nowait() == {"setpoint": 3.0}
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assert health == [("degraded", "publish queue full")]
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asyncio.run(scenario())
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def test_a_string_goes_on_the_wire_bare():
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"""Devices on a shared broker expect `ON`, not `"ON"`."""
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class Recorder:
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def __init__(self) -> None:
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self.published: list[tuple[str, str]] = []
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async def publish(self, topic, payload, **_):
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self.published.append((topic, payload))
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node = MqttNode(
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requires=[
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MessageSpec(name="plug", port="plug", dtype=DType.STR),
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MessageSpec(name="level", port="level", dtype=DType.INT),
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],
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params={"topic": {"plug": "actor/plug", "level": "light/level"}},
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)
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node.assign_flow("house", "out")
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client = Recorder()
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asyncio.run(node._publish_with(client, {"plug": "ON", "level": 60}))
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assert client.published == [("actor/plug", "ON"), ("light/level", "60")]
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