fix: key error prev_case_id

Author: congnghiahieu

src/schemathesis/specs/openapi/links.py

@@ -62,6 +62,10 @@ def from_definition(
  logger.debug(f"from_definition -> Link source operation: {source_operation}")
  logger.debug(f"from_definition -> Link target operation: {operation}")
  logger.debug(f"from_definition -> Link definition: {definition}")
+ extension = definition.get(SCHEMATHESIS_LINK_EXTENSION)
+ logger.debug(f"from_definition -> Link source operation: {source_operation}")
+ logger.debug(f"from_definition -> Link target operation: {operation}")
+ logger.debug(f"from_definition -> Link definition: {definition}")
  return cls(
  # Pylint can't detect that the API operation is always defined at this point
  # E.g. if there is no matching operation or no operations at all, then a ValueError will be risen

src/schemathesis/specs/openapi/schemas.py

@@ -615,7 +615,7 @@ def get_case_strategy(
  generator=data_generation_method,
  generation_config=generation_config,
  # **kwargs,
- prev_stateful_case=kwargs["prev_stateful_case"],
+ prev_stateful_case=kwargs["prev_stateful_case"] if "prev_stateful_case" in kwargs else None,
  )
 
  def get_parameter_serializer(