Melvin StroblandClaude Fable 5
06a4506767
Makes the flow engine reachable from the API, which is what M3 needs before
any of it can reach the browser.
- app/flow is a package now; the prototype's watch-dir scripts and the
matplotlib/networkx visualiser are gone with their dependencies.
- Messages carry a serializable dtype instead of a live Python type, and a
port name, so the graph can speak qualified names while node functions keep
local arguments. Redis state is JSON, not pickle.
- Message names are namespaced per flow ("heating.temp"); a bare name resolves
to its own flow, a dotted one crosses flows.
- Several nodes may provide the same message: producers are a list, so fan-in
is a real edge instead of a silently dropped one.
- Flows are stored as flow.json plus node sources in a git repository, one
commit per save, with identical saves skipped so autosave stays quiet.
- Node failures are isolated and reported per node; validate() returns cycles
and unconnected inputs instead of raising deep in a run.
- Credentials live in an encrypted store and are referenced as {"$secret": …}.
- Engine events reach websocket clients through a bus, so values, node status
and execution show up live.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016WzrvW7rjQbynnhF6pxh6i
76 lines
1.9 KiB
Python
76 lines
1.9 KiB
Python
import subprocess
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from pathlib import Path
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import pytest
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from app.flow.messages import MessageSpec
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from app.flow.schemas import FlowDef, NodeDef
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from app.flow.store import FlowNotFound, FlowStore
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@pytest.fixture
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def store(tmp_path: Path) -> FlowStore:
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return FlowStore(tmp_path / "flows")
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def commit_count(store: FlowStore) -> int:
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result = subprocess.run(
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["git", "-C", str(store.root), "rev-list", "--count", "HEAD"],
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capture_output=True,
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text=True,
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check=True,
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)
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return int(result.stdout.strip())
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def a_flow() -> FlowDef:
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return FlowDef(
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name="heating",
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nodes=[NodeDef(id="sensor", provides=[MessageSpec(name="temp")])],
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)
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def test_flow_round_trips(store: FlowStore):
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store.write_flow(a_flow())
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assert store.list_flows() == ["heating"]
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assert store.read_flow("heating").nodes[0].provides[0].name == "temp"
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def test_every_change_is_committed(store: FlowStore):
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before = commit_count(store)
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store.write_flow(a_flow())
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assert commit_count(store) == before + 1
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store.write_node_source(
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"heating", "sensor", "def process(params):\n return {}\n"
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)
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assert commit_count(store) == before + 2
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def test_saving_unchanged_content_does_nothing(store: FlowStore):
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store.write_flow(a_flow())
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commits = commit_count(store)
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# Autosave repeats the same document; history should not grow.
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assert store.write_flow(a_flow()) is False
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assert commit_count(store) == commits
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def test_missing_flow_is_reported(store: FlowStore):
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with pytest.raises(FlowNotFound):
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store.read_flow("nope")
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def test_deleting_removes_flow_and_its_nodes(store: FlowStore):
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store.write_flow(a_flow())
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store.write_node_source(
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"heating", "sensor", "def process(params):\n return {}\n"
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)
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store.delete_flow("heating")
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assert store.list_flows() == []
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assert not (store.root / "heating").exists()
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