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langchain-ai--langgraph/libs/sdk-py/integration/scripts/test_values.py
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chore: import upstream snapshot with attribution
2026-07-13 12:37:18 +08:00

90 lines
2.7 KiB
Python

"""Exercise `thread.values` against the integration API.
The integration graph's `ask_human` node interrupts mid-run. The
projection iterators (`thread.values`, `.messages`, `.tool_calls`,
`.subgraphs`) do not terminate on interrupt — they're paused, waiting
for more events. To drain the full run end-to-end we use a background
auto-responder that watches `thread.interrupted` and calls
`thread.run.respond(...)` so the run continues to the terminal.
Run after `docker compose up -d` from `libs/sdk-py/integration/`:
uv run python integration/scripts/test_values.py
"""
from __future__ import annotations
import asyncio
from _common import (
ASSISTANT_ID,
auto_respond_async,
auto_respond_sync,
check_api_reachable,
header,
make_async_client,
make_sync_client,
)
async def run_async() -> None:
header("async values")
threads, raw = make_async_client()
try:
async with threads.stream(assistant_id=ASSISTANT_ID) as thread:
await thread.run.start(input={"messages": [], "value": "init", "items": []})
# Background task: respond to the interrupt so the iterator
# eventually sees terminal-completion events.
responder = auto_respond_async(thread)
snapshots: list[dict] = []
async for snap in thread.values:
snapshots.append(snap)
print(
f" values snapshot: items={snap.get('items')!r} value={snap.get('value')!r}"
)
await responder
final = await thread.output
print(f" final output items={final.get('items')!r}")
assert "sub" in final.get("items", []), "expected subgraph to have run"
finally:
await raw.aclose()
def run_sync() -> None:
header("sync values")
threads, raw = make_sync_client()
try:
with threads.stream(assistant_id=ASSISTANT_ID) as thread:
thread.run.start(input={"messages": [], "value": "init", "items": []})
responder = auto_respond_sync(thread)
snapshots: list[dict] = []
for snap in thread.values:
snapshots.append(snap)
print(
f" values snapshot: items={snap.get('items')!r} value={snap.get('value')!r}"
)
responder.join(timeout=5)
final = thread.output
print(f" final output items={final.get('items')!r}")
assert "sub" in final.get("items", []), "expected subgraph to have run"
finally:
raw.close()
def main() -> None:
check_api_reachable()
asyncio.run(run_async())
run_sync()
if __name__ == "__main__":
main()