fix aurweb.auth test coverage

With mysqlclient, we no longer need to account for a user not existing
when an ssh key is found.

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/auth.py

@@ -4,7 +4,8 @@ from datetime import datetime
 from http import HTTPStatus
 
 from fastapi.responses import RedirectResponse
-from starlette.authentication import AuthCredentials, AuthenticationBackend, AuthenticationError
+from sqlalchemy import and_
+from starlette.authentication import AuthCredentials, AuthenticationBackend
 from starlette.requests import HTTPConnection
 
 import aurweb.config
@@ -42,14 +43,17 @@ class BasicAuthBackend(AuthenticationBackend):
 
         now_ts = datetime.utcnow().timestamp()
         record = session.query(Session).filter(
-            Session.SessionID == sid, Session.LastUpdateTS >= now_ts).first()
+            and_(Session.SessionID == sid,
+                 Session.LastUpdateTS >= now_ts)).first()
+
+        # If no session with sid and a LastUpdateTS now or later exists.
         if not record:
             return None, AnonymousUser()
 
+        # At this point, we cannot have an invalid user if the record
+        # exists, due to ForeignKey constraints in the schema upheld
+        # by mysqlclient.
         user = session.query(User).filter(User.ID == record.UsersID).first()
-        if not user:
-            raise AuthenticationError(f"Invalid User ID: {record.UsersID}")
-
         user.authenticated = True
         return AuthCredentials(["authenticated"]), user
 

test/test_auth.py

@@ -2,7 +2,7 @@ from datetime import datetime
 
 import pytest
 
-from starlette.authentication import AuthenticationError
+from sqlalchemy.exc import IntegrityError
 
 import aurweb.config
 
@@ -53,13 +53,13 @@ async def test_auth_backend_invalid_sid():
 
 @pytest.mark.asyncio
 async def test_auth_backend_invalid_user_id():
+    from aurweb.db import session
+
     # Create a new session with a fake user id.
     now_ts = datetime.utcnow().timestamp()
-    db_backend = aurweb.config.get("database", "backend")
     with pytest.raises(IntegrityError):
         create(Session, UsersID=666, SessionID="realSession",
                LastUpdateTS=now_ts + 5)
-
     session.rollback()
 
 
@@ -70,6 +70,7 @@ async def test_basic_auth_backend():
     now_ts = datetime.utcnow().timestamp()
     create(Session, UsersID=user.ID, SessionID="realSession",
            LastUpdateTS=now_ts + 5)
+    request.cookies["AURSID"] = "realSession"
     _, result = await backend.authenticate(request)
     assert result == user