[Test] Add test for disabled registration

tests/test_register.py

@@ -20,7 +20,7 @@
 import calsocial
 from calsocial.models import db, User
 
-from helpers import client
+from helpers import alter_config, client
 
 
 def test_register_page(client):
@@ -113,3 +113,9 @@ def test_register_existing_email(client):
         'password_retype': 'password',
     })
     assert b'This email address can not be used' in page.data
+
+
+def test_registration_disabled(client):
+    with alter_config(calsocial.app, REGISTRATION_ENABLED=False):
+        page = client.get('/accounts/register')
+        assert b'Registration is disabled' in page.data