Introduce another dummy backend more amenable for testing

This allows us to more easily mock the Nemesis responses a bit more
directly, which is easier to use when not trying to test the auth
logic specifically.

Author: PeterJCLaw

code_submitter/auth.py

@@ -161,3 +161,32 @@ async def validate(self, username: str, password: str) -> ValidationResult:
         team = self.get_team(info)
 
         return ['authenticated'], User(username, team)
+
+
+class DummyNemesisBackend(NemesisBackend):
+    DEFAULT = [
+        NemesisUserInfo({
+            'username': 'blueshirt',
+            'first_name': 'Blue',
+            'last_name': 'Shirt',
+            'teams': ['team-SRZ'],
+            'is_blueshirt': True,
+            'is_student': False,
+            'is_team_leader': False,
+        }),
+        NemesisUserInfo({
+            'username': 'competitor',
+            'first_name': 'Competitor',
+            'last_name': '',
+            'teams': ['team-ABC'],
+            'is_blueshirt': False,
+            'is_student': False,
+            'is_team_leader': False,
+        }),
+    ]
+
+    def __init__(self, data: List[NemesisUserInfo] = DEFAULT) -> None:
+        self.data = {x['username']: x for x in data}
+
+    async def load_user(self, username: str, password: str) -> NemesisUserInfo:
+        return self.data[username]

tests/test_utils.py

@@ -9,6 +9,7 @@
 from sqlalchemy import create_engine
 from alembic.config import Config  # type: ignore[import]
 from starlette.config import environ
+from code_submitter.auth import NemesisUserInfo, DummyNemesisBackend
 
 T = TypeVar('T')
 
@@ -32,8 +33,19 @@ def ensure_database_configured() -> None:
     environ['DATABASE_URL'] = url
 
     environ['AUTH_BACKEND'] = json.dumps({
-        'backend': 'code_submitter.auth.DummyBackend',
-        'kwargs': {'team': 'SRZ2'},
+        'backend': 'code_submitter.auth.DummyNemesisBackend',
+        'kwargs': {'data': [
+            NemesisUserInfo({
+                'username': 'test_user',
+                'first_name': 'Test',
+                'last_name': 'User',
+                'teams': ['team-SRZ2'],
+                'is_blueshirt': False,
+                'is_student': False,
+                'is_team_leader': False,
+            }),
+            *DummyNemesisBackend.DEFAULT,
+        ]},
     })
 
     create_engine(url)