test: MockHub default allow_all=True

not unconditional

jupyterhub/tests/mocking.py

@@ -243,7 +243,8 @@ class MockHub(JupyterHub):
             cert_location = kwargs['internal_certs_location']
             kwargs['external_certs'] = ssl_setup(cert_location, 'hub-ca')
         super().__init__(*args, **kwargs)
-        self.config.Authenticator.allow_all = True
+        if 'allow_all' not in self.config.Authenticator:
+            self.config.Authenticatorallow_all = True
 
     @default('subdomain_host')
     def _subdomain_host_default(self):

jupyterhub/tests/test_app.py

@@ -475,6 +475,7 @@ async def test_user_creation(tmpdir, request):
     ]
 
     cfg = Config()
+    cfg.Authenticator.allow_all = False
     cfg.Authenticator.allowed_users = allowed_users
     cfg.JupyterHub.load_groups = groups
     cfg.JupyterHub.load_roles = roles