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import abc
from typing import Any, Final, Optional
class MockedResponse(abc.ABC):
range_start: Final[int]
range_end: Final[int]
def __init__(self, range_start: int, range_end: int):
super().__init__()
if range_start < 0 or range_end < 0:
raise ValueError(
f"Invalid range: both '{range_start}' and '{range_end}' must be positive integers."
)
if range_start != range_end and range_end < range_start + 1:
raise ValueError(
f"Invalid range: values must be equal or '{range_start}' "
f"must be at least one greater than '{range_end}'."
)
self.range_start = range_start
self.range_end = range_end
class MockedResponseReturn(MockedResponse):
payload: Final[Any]
def __init__(self, range_start: int, range_end: int, payload: Any):
super().__init__(range_start=range_start, range_end=range_end)
self.payload = payload
class MockedResponseThrow(MockedResponse):
error: Final[str]
cause: Final[str]
def __init__(self, range_start: int, range_end: int, error: str, cause: str):
super().__init__(range_start=range_start, range_end=range_end)
self.error = error
self.cause = cause
class StateMockedResponses:
state_name: Final[str]
mocked_response_name: Final[str]
mocked_responses: Final[list[MockedResponse]]
def __init__(
self,
state_name: str,
mocked_response_name: str,
mocked_responses: list[MockedResponse],
):
self.state_name = state_name
self.mocked_response_name = mocked_response_name
self.mocked_responses = []
last_range_end: int = -1
mocked_responses_sorted = sorted(
mocked_responses, key=lambda mr: mr.range_start
)
for mocked_response in mocked_responses_sorted:
if not mocked_response.range_start - last_range_end == 1:
raise RuntimeError(
f"Inconsistent event numbering detected for state '{state_name}': "
f"the previous mocked response ended at event '{last_range_end}' "
f"while the next response '{mocked_response_name}' "
f"starts at event '{mocked_response.range_start}'. "
"Mock responses must be consecutively numbered. "
f"Expected the next response to begin at event {last_range_end + 1}."
)
repeats = mocked_response.range_end - mocked_response.range_start + 1
self.mocked_responses.extend([mocked_response] * repeats)
last_range_end = mocked_response.range_end
class MockTestCase:
state_machine_name: Final[str]
test_case_name: Final[str]
state_mocked_responses: Final[dict[str, StateMockedResponses]]
def __init__(
self,
state_machine_name: str,
test_case_name: str,
state_mocked_responses_list: list[StateMockedResponses],
):
self.state_machine_name = state_machine_name
self.test_case_name = test_case_name
self.state_mocked_responses = {}
for state_mocked_response in state_mocked_responses_list:
state_name = state_mocked_response.state_name
if state_name in self.state_mocked_responses:
raise RuntimeError(
f"Duplicate definition of state '{state_name}' for test case '{test_case_name}'"
)
self.state_mocked_responses[state_name] = state_mocked_response
def _parse_mocked_response_range(string_definition: str) -> tuple[int, int]:
definition_parts = string_definition.strip().split("-")
if len(definition_parts) == 1:
range_part = definition_parts[0]
try:
range_value = int(range_part)
return range_value, range_value
except Exception:
raise RuntimeError(
f"Unknown mocked response retry range value '{range_part}', not a valid integer"
)
elif len(definition_parts) == 2:
range_part_start = definition_parts[0]
range_part_end = definition_parts[1]
try:
return int(range_part_start), int(range_part_end)
except Exception:
raise RuntimeError(
f"Unknown mocked response retry range value '{range_part_start}:{range_part_end}', "
"not valid integer values"
)
else:
raise RuntimeError(
f"Unknown mocked response retry range definition '{string_definition}', "
"range definition should consist of one integer (e.g. '0'), or a integer range (e.g. '1-2')'."
)
def _mocked_response_from_raw(
raw_response_model_range: str, raw_response_model
) -> MockedResponse:
range_start, range_end = _parse_mocked_response_range(raw_response_model_range)
if raw_response_model.Return:
payload = raw_response_model.Return.model_dump()
return MockedResponseReturn(
range_start=range_start, range_end=range_end, payload=payload
)
throw_definition = raw_response_model.Throw
return MockedResponseThrow(
range_start=range_start,
range_end=range_end,
error=throw_definition.Error,
cause=throw_definition.Cause,
)
def _mocked_responses_from_raw(
mocked_response_name: str, raw_mock_config
) -> list[MockedResponse]:
raw_response_models = raw_mock_config.MockedResponses.get(mocked_response_name)
if not raw_response_models:
raise RuntimeError(
f"No definitions for mocked response '{mocked_response_name}' in the mock configuration file."
)
mocked_responses: list[MockedResponse] = []
for raw_response_model_range, raw_response_model in raw_response_models.items():
mocked_response: MockedResponse = _mocked_response_from_raw(
raw_response_model_range=raw_response_model_range,
raw_response_model=raw_response_model,
)
mocked_responses.append(mocked_response)
return mocked_responses
def _state_mocked_responses_from_raw(
state_name: str, mocked_response_name: str, raw_mock_config
) -> StateMockedResponses:
mocked_responses = _mocked_responses_from_raw(
mocked_response_name=mocked_response_name, raw_mock_config=raw_mock_config
)
return StateMockedResponses(
state_name=state_name,
mocked_response_name=mocked_response_name,
mocked_responses=mocked_responses,
)
def _mock_test_case_from_raw(
state_machine_name: str, test_case_name: str, raw_mock_config
) -> MockTestCase:
state_machine = raw_mock_config.StateMachines.get(state_machine_name)
if not state_machine:
raise RuntimeError(
f"No definitions for state machine '{state_machine_name}' in the mock configuration file."
)
test_case = state_machine.TestCases.get(test_case_name)
if not test_case:
raise RuntimeError(
f"No definitions for test case '{test_case_name}' and "
f"state machine '{state_machine_name}' in the mock configuration file."
)
state_mocked_responses_list: list[StateMockedResponses] = []
for state_name, mocked_response_name in test_case.root.items():
state_mocked_responses = _state_mocked_responses_from_raw(
state_name=state_name,
mocked_response_name=mocked_response_name,
raw_mock_config=raw_mock_config,
)
state_mocked_responses_list.append(state_mocked_responses)
return MockTestCase(
state_machine_name=state_machine_name,
test_case_name=test_case_name,
state_mocked_responses_list=state_mocked_responses_list,
)
def load_mock_test_case_for(
state_machine_name: str, test_case_name: str
) -> Optional[MockTestCase]:
raw_mock_config = None
if raw_mock_config is None:
return None
mock_test_case: MockTestCase = _mock_test_case_from_raw(
state_machine_name=state_machine_name,
test_case_name=test_case_name,
raw_mock_config=raw_mock_config,
)
return mock_test_case
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