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langgraph/libs/checkpoint/tests/test_conformance_delta.py
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Python

"""Run delta-channel conformance capabilities against InMemorySaver."""
from __future__ import annotations
import pytest
conformance = pytest.importorskip(
"langgraph.checkpoint.conformance",
reason="langgraph-checkpoint-conformance not installed",
)
@pytest.mark.asyncio
async def test_delta_channel_conformance():
from langgraph.checkpoint.conformance import validate
from langgraph.checkpoint.conformance.initializer import checkpointer_test
from langgraph.checkpoint.memory import InMemorySaver
@checkpointer_test(name="InMemorySaver")
async def mem_saver():
yield InMemorySaver()
report = await validate(
mem_saver,
capabilities={
"delta_channel_history",
"delta_channel_keepset",
"delta_channel_reconstruction",
},
)
for cap, result in report.results.items():
if result.passed is False:
details = "\n".join(result.failures or [])
pytest.fail(f"Capability {cap} failed:\n{details}")