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https://github.com/langchain-ai/langgraph.git
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Elior Nataf LackritzandGitHub
36a505ac65
Depends on #8535 `libs/checkpoint-conformance/tests/` only validates `InMemorySaver`. `checkpoint-sqlite` has had a `test_conformance_delta.py` for a while, but it guards on `importorskip("langgraph.checkpoint.conformance")` and the package was never in its test environment — so it has been skipping silently every run. `checkpoint-postgres` had no runner at all. Net effect: the shared checkpointer contract was effectively unenforced everywhere except in-memory. ### Change Adds `langgraph-checkpoint-conformance` to the `test` dependency group of both packages, with a path source like the existing `langgraph-checkpoint` entry. That alone is what makes sqlite's runner start executing. Postgres gets the equivalent runner. Both pass the `delta_channel_history` capability. ### Why it's stacked Against `main`'s Postgres, the new runner fails: ``` Capability delta_channel_history failed: test_history_migration_plain_value_as_seed ``` That is exactly the bug #8535 fixes, and it had been failing unnoticed precisely because nothing ran the suite there. So this is based on that branch rather than `main` — the diff here is the one conformance commit, and it will retarget once #8535 lands. Reasonable to read that as the change justifying itself: the first thing turning the suite on did was catch a real bug that had been sitting in `main`. ### Verified `checkpoint-postgres` 270 passed on PG 15 and 16, `checkpoint-sqlite` 118 passed, lint and `ty` clean in both. The `uv.lock` updates are the conformance package entry only. ### Note The sync `PostgresSaver` and `SqliteSaver` aren't covered — the conformance harness reports every capability as `detected=False` for them, so only the async savers are exercised. Pre-existing and not addressed here, but worth knowing the coverage isn't total.
31 lines
977 B
Python
31 lines
977 B
Python
"""Run delta-channel conformance capabilities against AsyncPostgresSaver."""
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from __future__ import annotations
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import pytest
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from langgraph.checkpoint.conformance import validate
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from langgraph.checkpoint.conformance.initializer import checkpointer_test
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from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
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from tests.conftest import DEFAULT_URI
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@pytest.mark.asyncio
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async def test_delta_channel_conformance():
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@checkpointer_test(name="AsyncPostgresSaver")
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async def postgres_saver():
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async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
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await saver.setup()
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yield saver
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report = await validate(
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postgres_saver,
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capabilities={
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"delta_channel_history",
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},
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)
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for cap, result in report.results.items():
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if result.passed is False:
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details = "\n".join(result.failures or [])
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pytest.fail(f"Capability {cap} failed:\n{details}")
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