Fix issue where CI is failing because pseduo cluster does not have re…

…sponse mapping (project-chip#24823)

scripts/py_matter_yamltests/matter_yamltests/parser.py

@@ -690,14 +690,21 @@ def _response_constraints_validation(self, response, result):
  received_value = response.get('value')
  if not self.is_attribute:
  expected_name = value.get('name')
- response_type_name = self._test.response_mapping.get(
- expected_name)
  if received_value is None or expected_name not in received_value:
  received_value = None
  else:
  received_value = received_value.get(
  expected_name) if received_value else None
 
+ if self._test.response_mapping:
+ response_type_name = self._test.response_mapping.get(
+ expected_name)
+ else:
+ # We don't have a mapping for this type. This happens for pseduo clusters.
+ # If there is a constraint check for the type it is likely an incorrect
+ # constraint check by the test writter.
+ response_type_name = None
+
  constraints = get_constraints(value['constraints'])
 
  if all([constraint.is_met(received_value, response_type_name) for constraint in constraints]):