interface-contract-verifier

To check API compatibility after refactoring, you verify that interface contracts—preconditions, postconditions, and invariants—remain intact between the old and new software versions. This process detects strengthened preconditions or weakened postconditions to prevent behavioral regressions.

Design by contract prevents software regressions by defining strict behavioral guarantees through preconditions, postconditions, and invariants. Verifying these contracts across software versions ensures that new code adheres to original behavioral expectations and maintains program correctness.

You detect Liskov substitution principle violations by analyzing extracted contract definitions to identify strengthened preconditions, weakened postconditions, or broken invariants between parent and child class versions. This analysis confirms behavioral compatibility across your software.

Yes, you can use contract verification to ensure behavioral compatibility between two program versions. It compares extracted contract definitions to identify violations like broken invariants, confirming that the new version preserves the original program correctness guarantees.

Automated contract verification for code quality is limited by its reliance on explicitly extracted contract definitions. It detects violations like strengthened preconditions and broken invariants, but cannot verify implicit or undocumented behavioral guarantees not formally defined in the code.

You should run interface contract checks after refactoring a critical API to ensure the new version still adheres to original behavioral guarantees. This prevents unexpected client-side errors by confirming preconditions, postconditions, and invariants are preserved across versions.