mirror of
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113 lines
4.0 KiB
Python
113 lines
4.0 KiB
Python
from typing import Any
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import pytest
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from conftest import DEFAULT_URI # type: ignore
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from langchain_core.runnables import RunnableConfig
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from langgraph.checkpoint.base import (
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Checkpoint,
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CheckpointMetadata,
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create_checkpoint,
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empty_checkpoint,
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)
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from langgraph.checkpoint.postgres import PostgresSaver
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class TestPostgresSaver:
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@pytest.fixture(autouse=True)
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def setup(self) -> None:
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# objects for test setup
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self.config_1: RunnableConfig = {
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"configurable": {
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"thread_id": "thread-1",
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# for backwards compatibility testing
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"thread_ts": "1",
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"checkpoint_ns": "",
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}
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}
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self.config_2: RunnableConfig = {
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"configurable": {
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"thread_id": "thread-2",
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"checkpoint_id": "2",
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"checkpoint_ns": "",
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}
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}
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self.config_3: RunnableConfig = {
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"configurable": {
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"thread_id": "thread-2",
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"checkpoint_id": "2-inner",
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"checkpoint_ns": "inner",
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}
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}
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self.chkpnt_1: Checkpoint = empty_checkpoint()
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self.chkpnt_2: Checkpoint = create_checkpoint(self.chkpnt_1, {}, 1)
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self.chkpnt_3: Checkpoint = empty_checkpoint()
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self.metadata_1: CheckpointMetadata = {
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"source": "input",
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"step": 2,
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"writes": {},
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"score": 1,
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}
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self.metadata_2: CheckpointMetadata = {
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"source": "loop",
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"step": 1,
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"writes": {"foo": "bar"},
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"score": None,
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}
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self.metadata_3: CheckpointMetadata = {}
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with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
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saver.setup()
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def test_search(self) -> None:
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with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
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# save checkpoints
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saver.put(self.config_1, self.chkpnt_1, self.metadata_1, {})
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saver.put(self.config_2, self.chkpnt_2, self.metadata_2, {})
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saver.put(self.config_3, self.chkpnt_3, self.metadata_3, {})
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# call method / assertions
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query_1 = {"source": "input"} # search by 1 key
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query_2 = {
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"step": 1,
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"writes": {"foo": "bar"},
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} # search by multiple keys
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query_3: dict[str, Any] = {} # search by no keys, return all checkpoints
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query_4 = {"source": "update", "step": 1} # no match
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search_results_1 = list(saver.list(None, filter=query_1))
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assert len(search_results_1) == 1
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assert search_results_1[0].metadata == self.metadata_1
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search_results_2 = list(saver.list(None, filter=query_2))
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assert len(search_results_2) == 1
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assert search_results_2[0].metadata == self.metadata_2
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search_results_3 = list(saver.list(None, filter=query_3))
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assert len(search_results_3) == 3
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search_results_4 = list(saver.list(None, filter=query_4))
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assert len(search_results_4) == 0
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# search by config (defaults to checkpoints across all namespaces)
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search_results_5 = list(
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saver.list({"configurable": {"thread_id": "thread-2"}})
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)
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assert len(search_results_5) == 2
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assert {
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search_results_5[0].config["configurable"]["checkpoint_ns"],
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search_results_5[1].config["configurable"]["checkpoint_ns"],
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} == {"", "inner"}
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# TODO: test before and limit params
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def test_null_chars(self) -> None:
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with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
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config = saver.put(self.config_1, self.chkpnt_1, {"my_key": "\x00abc"}, {})
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assert saver.get_tuple(config).metadata["my_key"] == "abc" # type: ignore
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assert (
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list(saver.list(None, filter={"my_key": "abc"}))[0].metadata["my_key"] # type: ignore
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== "abc"
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)
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