with tutil.mock_keep_responses(self.locator, return_code, return_code, **headers):
case_desc = 'wanted_copies={}, wanted_classes="{}", confirmed_copies={}, confirmed_classes="{}"'.format(w_copies, ', '.join(w_classes), c_copies, c_classes)
with self.assertRaises(arvados.errors.KeepWriteError, msg=case_desc):
with tutil.mock_keep_responses(self.locator, return_code, return_code, **headers):
case_desc = 'wanted_copies={}, wanted_classes="{}", confirmed_copies={}, confirmed_classes="{}"'.format(w_copies, ', '.join(w_classes), c_copies, c_classes)
with self.assertRaises(arvados.errors.KeepWriteError, msg=case_desc):