def test_copy_center_is_readonly(self):
"""Ensure copy centers can't be changed except for deleted status"""
original = RegistrationCenterFactory()
copy = RegistrationCenterFactory(copy_of=original)
center_admin = RegistrationCenterAdmin(RegistrationCenter, admin.site)
fields = set(center_admin.get_fields(Mock(), obj=copy))
readonly_fields = set(center_admin.get_readonly_fields(Mock(), obj=copy))
readwrite_fields = list(fields - readonly_fields)
self.assertEqual(readwrite_fields, ['deleted'])
