Fix fastapi example test not working and make deps raise SolverProblemError.

CHANGELOG.rst

@@ -15,7 +15,9 @@ Added
 - Added config_class option to pydantic model genator that allows the developer to customize the generated pydantic model's `Config` class. (#1048)
 Fixed
 ^^^^^
+- Fastapi example test not working. (#1029)
 - Fix create index sql error. (#1202)
+- Fix dependencies resolve error. (#1246)
 
 0.19.2
 ------

examples/fastapi/_tests.py

@@ -1,40 +1,32 @@
 # mypy: no-disallow-untyped-decorators
 # pylint: disable=E0611,E0401
-import asyncio
-from typing import Generator
-
 import pytest
-from fastapi.testclient import TestClient
+from asgi_lifespan import LifespanManager
+from httpx import AsyncClient
 from main import app
 from models import Users
 
-from tortoise.contrib.test import finalizer, initializer
-
 
 @pytest.fixture(scope="module")
-def client() -> Generator:
-    initializer(["models"])
-    with TestClient(app) as c:
-        yield c
-    finalizer()
+def anyio_backend():
+    return "asyncio"
 
 
 @pytest.fixture(scope="module")
-def event_loop(client: TestClient) -> Generator:
-    yield client.task.get_loop()  # type: ignore
+async def client():
+    async with LifespanManager(app):
+        async with AsyncClient(app=app, base_url="http://test") as c:
+            yield c
 
 
-def test_create_user(client: TestClient, event_loop: asyncio.AbstractEventLoop):  # nosec
-    response = client.post("/users", json={"username": "admin"})
+@pytest.mark.anyio
+async def test_create_user(client: AsyncClient):  # nosec
+    response = await client.post("/users", json={"username": "admin"})
     assert response.status_code == 200, response.text
     data = response.json()
     assert data["username"] == "admin"
     assert "id" in data
     user_id = data["id"]
 
-    async def get_user_by_db():
-        user = await Users.get(id=user_id)
-        return user
-
-    user_obj = event_loop.run_until_complete(get_user_by_db())
+    user_obj = await Users.get(id=user_id)
     assert user_obj.id == user_id