mock-overload-resolution

Moq unit tests silently pass after method signature changes because the mock setup no longer matches the new interface overload, causing the setup to be bypassed without throwing an exception.

You update Moq mock setups by matching the actual method call parameters to the new interface overload signature, ensuring the test configuration accurately reflects the changed code behavior and avoids false results.

Overload resolution mismatch causes false positives in Moq tests when a modified method signature bypasses the configured setup entirely, making the test pass silently while the underlying code path remains unverified.

You can use this Skill to fix C# unit test maintenance issues by detecting signature mismatches between mocked methods and actual interface overloads, guiding accurate Moq setup updates for new parameters.

The best way to prevent silent failures when adding parameters to mocked methods is to resolve the overload mismatch by updating the Moq setup to explicitly match the actual method call parameters.

When interface method overloads are modified, existing Moq configurations fail to match the new signatures, leading to silent test failures or false positives that require updating the mock setups to resolve.