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Sarj Sarj Sarj Standards

repeated-unimplemented-test-contract

Share repeated typed fail-fast abstract operations between test fakes.

SARJ490 Rule source Tests Catalog JSON

Why

Copied unconfigured operations add test support code and drift independently when a contract changes.

Fix

Use one explicit typed strict test base for the contract. Preserve each leaf fake's configured behavior and failure timing; verify that the complete base and wiring reduce maintained code.

Examples

Before — flagged Two test fakes repeat one unconfigured operation
tests/__init__.py
# Example test package.
tests/test_store.py
from abc import ABC, abstractmethod




class Store(ABC):
    @abstractmethod
    def read(self, key: str) -> str:
        pass




class First(Store):
    def read(self, key: str) -> str:
        raise NotImplementedError




class Second(Store):
    def read(self, key: str) -> str:
        raise NotImplementedError
After — preferred Configured fake behavior belongs to the leaf
tests/__init__.py
# Example test package.
tests/test_store.py
from abc import ABC, abstractmethod




class Store(ABC):
    @abstractmethod
    def read(self, key: str) -> str:
        pass




class First(Store):
    def read(self, key: str) -> str:
        raise NotImplementedError




class Second(Store):
    def read(self, key: str) -> str:
        return key