yunke/yunke-server/tests/test_api_customer.py

"""Tests for app.api — minimal customer list API + health check.

Drives the FastAPI app over an in-process transport (``httpx.AsyncClient`` with
``ASGITransport``) — no real network socket. The ``get_session`` dependency is
overridden to yield an isolated in-memory async SQLite session. ``StaticPool``
keeps a single connection behind every session so all requests inside a test
see the same seeded schema/rows.

Coverage (Task 1.8 acceptance):
* ``GET /api/health`` -> 200 ``{"status": "ok"}``.
* ``GET /api/customers?channel=wechat`` -> ``total == 2`` and correct shape.
* ``GET /api/customers?channel=whatsapp`` -> ``total == 1``.
* Pagination: ``page_size=1&page=1`` -> 1 item, ``total`` still 3.
* Ordering: ``last_chat_time desc`` (nulls last) then ``friend_id``.
* Documented filters ``owner_account_id`` and ``department_id`` actually filter.
"""

from __future__ import annotations

import pytest
from httpx import ASGITransport, AsyncClient
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
from sqlalchemy.pool import StaticPool

from app.api import deps
from app.api.main import app
from app.db.base import Base
from app.db.models import Customer, Staff


@pytest.fixture
async def client():
    """Yield an ``AsyncClient`` against ``app`` with a seeded in-memory DB.

    Seeds three Customers (two wechat, one whatsapp) plus two Staff rows so the
    ``department_id`` filter (Customer.user_id -> Staff.dept_id) is exercisable.
    """
    engine = create_async_engine(
        "sqlite+aiosqlite:///:memory:",
        poolclass=StaticPool,
        connect_args={"check_same_thread": False},
    )
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

    SessionLocal = async_sessionmaker(engine, expire_on_commit=False)
    async with SessionLocal() as session:
        session.add_all(
            [
                Customer(
                    friend_id="wx_a",
                    channel="wechat",
                    owner_account_id="wx_owner_1",
                    user_id="u1",
                    friend_nickname="Alice",
                    last_chat_time=2000,
                    message_count=10,
                    version="v1",
                ),
                Customer(
                    friend_id="wx_b",
                    channel="wechat",
                    owner_account_id="wx_owner_1",
                    user_id="u2",
                    friend_nickname="Bob",
                    last_chat_time=1000,
                    version="v1",
                ),
                Customer(
                    friend_id="wa_c",
                    channel="whatsapp",
                    owner_account_id="wa_owner_1",
                    user_id="u3",
                    friend_nickname="Carol",
                    last_chat_time=None,
                    version="v1",
                ),
                Staff(user_id="u1", dept_id="d100"),
                Staff(user_id="u2", dept_id="d200"),
            ]
        )
        await session.commit()

    async def _override_session():
        async with SessionLocal() as s:
            yield s

    app.dependency_overrides[deps.get_session] = _override_session
    try:
        async with AsyncClient(
            transport=ASGITransport(app=app), base_url="http://test"
        ) as ac:
            yield ac
    finally:
        app.dependency_overrides.clear()
        await engine.dispose()


async def test_health_returns_ok(client: AsyncClient):
    """``GET /api/health`` -> 200 ``{"status": "ok"}``."""
    r = await client.get("/api/health")
    assert r.status_code == 200
    assert r.json() == {"status": "ok"}


async def test_list_default_page_returns_all(client: AsyncClient):
    """No query params -> page 1, page_size 20, all 3 rows."""
    r = await client.get("/api/customers")
    assert r.status_code == 200
    body = r.json()
    assert body["page"] == 1
    assert body["page_size"] == 20
    assert body["total"] == 3
    assert len(body["items"]) == 3
    # Shape: every documented CustomerOut field is present.
    item = body["items"][0]
    for key in (
        "friend_id",
        "channel",
        "owner_account_id",
        "friend_nickname",
        "friend_remark",
        "real_name",
        "phone",
        "region",
        "sale_name",
        "dept_name",
        "head_image_url",
        "last_chat_time",
        "message_count",
        "version",
    ):
        assert key in item


async def test_list_filters_by_channel_wechat(client: AsyncClient):
    """``?channel=wechat`` -> total 2, both wechat rows."""
    r = await client.get(
        "/api/customers", params={"channel": "wechat", "page": 1, "page_size": 10}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 2
    assert len(body["items"]) == 2
    assert {it["friend_id"] for it in body["items"]} == {"wx_a", "wx_b"}
    assert all(it["channel"] == "wechat" for it in body["items"])


async def test_list_filters_by_channel_whatsapp(client: AsyncClient):
    """``?channel=whatsapp`` -> total 1."""
    r = await client.get("/api/customers", params={"channel": "whatsapp"})
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["friend_id"] == "wa_c"


async def test_pagination_page_size_one(client: AsyncClient):
    """``page_size=1&page=1`` -> 1 item but ``total`` still reflects all rows."""
    r = await client.get(
        "/api/customers", params={"page": 1, "page_size": 1}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 3
    assert len(body["items"]) == 1


async def test_order_is_last_chat_time_desc_nulls_last(client: AsyncClient):
    """Order: ``last_chat_time desc`` (nulls last), then ``friend_id``.

    Seeded rows have last_chat_time 2000 / 1000 / None -> expected order
    ``[wx_a, wx_b, wa_c]`` (the whatsapp row with NULL last_chat_time lands
    last even though it has no timestamp).
    """
    r = await client.get(
        "/api/customers", params={"page": 1, "page_size": 20}
    )
    assert r.status_code == 200
    ids = [it["friend_id"] for it in r.json()["items"]]
    assert ids == ["wx_a", "wx_b", "wa_c"]


async def test_filter_by_owner_account_id(client: AsyncClient):
    """``?owner_account_id=wa_owner_1`` -> only the whatsapp customer."""
    r = await client.get(
        "/api/customers", params={"owner_account_id": "wa_owner_1"}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["friend_id"] == "wa_c"


async def test_filter_by_department_id(client: AsyncClient):
    """``?department_id=d100`` -> customers whose ``user_id`` maps to that dept.

    Customer ``wx_a`` has ``user_id=u1``; Staff ``u1`` belongs to ``d100``.
    """
    r = await client.get(
        "/api/customers", params={"department_id": "d100"}
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 1
    assert body["items"][0]["friend_id"] == "wx_a"


async def test_filters_compose_channel_and_owner(client: AsyncClient):
    """Two filters AND together: channel=wechat + owner=wx_owner_1 -> 2 rows."""
    r = await client.get(
        "/api/customers",
        params={"channel": "wechat", "owner_account_id": "wx_owner_1"},
    )
    assert r.status_code == 200
    body = r.json()
    assert body["total"] == 2
    assert {it["friend_id"] for it in body["items"]} == {"wx_a", "wx_b"}