test/memory+runtime: cover store and client factory

Enable pytest-asyncio auto mode; assert default user, message
round-trip, and provider→client mapping including errors.

tests/test_memory/test_store.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import pytest
+
+from plyngent.config.models import DatabaseConfig
+from plyngent.lmproto.openai_compatible.model import AssistantChatMessage, UserChatMessage
+from plyngent.memory import DEFAULT_USER_NAME, MemoryStore
+
+if TYPE_CHECKING:
+    from collections.abc import AsyncIterator
+
+
+@pytest.fixture
+async def store() -> AsyncIterator[MemoryStore]:
+    memory = await MemoryStore.open(DatabaseConfig())
+    yield memory
+    await memory.close()
+
+
+async def test_open_creates_default_user(store: MemoryStore) -> None:
+    user = await store.get_user_by_name(DEFAULT_USER_NAME)
+    assert user is not None
+    assert user.name == DEFAULT_USER_NAME
+
+
+async def test_create_session_uses_default_user(store: MemoryStore) -> None:
+    session = await store.create_session(name="chat-1")
+    assert session.sid is not None
+    assert session.name == "chat-1"
+    user = await store.get_user_by_name(DEFAULT_USER_NAME)
+    assert user is not None
+    assert session.uid == user.uid
+
+
+async def test_append_and_list_messages(store: MemoryStore) -> None:
+    session = await store.create_session()
+    user_msg = UserChatMessage(content="hello")
+    assistant_msg = AssistantChatMessage(content="hi")
+
+    row0 = await store.append_message(session.sid, user_msg)
+    row1 = await store.append_message(session.sid, assistant_msg)
+    assert row0.seq == 0
+    assert row1.seq == 1
+
+    messages = await store.list_messages(session.sid)
+    assert len(messages) == 2  # noqa: PLR2004
+    assert isinstance(messages[0], UserChatMessage)
+    assert messages[0].content == "hello"
+    assert isinstance(messages[1], AssistantChatMessage)
+    assert messages[1].content == "hi"
+
+
+async def test_list_sessions(store: MemoryStore) -> None:
+    s1 = await store.create_session(name="a")
+    s2 = await store.create_session(name="b")
+    sessions = await store.list_sessions()
+    ids = {s.sid for s in sessions}
+    assert s1.sid in ids
+    assert s2.sid in ids