avoid cleaning users when we are testing resume

jupyterhub/tests/mocking.py

@@ -40,7 +40,7 @@ from tornado import gen
 from tornado.concurrent import Future
 from tornado.ioloop import IOLoop
 
-from traitlets import default
+from traitlets import Bool, default
 
 from ..app import JupyterHub
 from ..auth import PAMAuthenticator
@@ -282,9 +282,12 @@ class MockHub(JupyterHub):
             self.db.expire(service)
         return super().init_services()
 
+    clean_users = Bool(True)
+
     def init_db(self):
         """Ensure we start with a clean user list"""
         super().init_db()
+        if self.clean_users:
             for user in self.db.query(orm.User):
                 self.db.delete(user)
             self.db.commit()

jupyterhub/tests/test_app.py

@@ -206,7 +206,7 @@ def test_resume_spawners(tmpdir, request):
         ssl_enabled = getattr(request.module, "ssl_enabled", False)
         if ssl_enabled:
             kwargs['internal_certs_location'] = str(tmpdir)
-        app = MockHub(**kwargs)
+        app = MockHub(clean_users=False, **kwargs)
         app.config.ConfigurableHTTPProxy.should_start = False
         app.config.ConfigurableHTTPProxy.auth_token = 'unused'
         yield app.initialize([])