CannotMockMethod
Mockito cannot mock final or static methods, and can't detect this at runtime

Alternate names: MockitoBadFinalMethod, CannotMockFinalMethod

The problem

Mockito cannot mock final or static methods, and cannot tell at runtime that this is attempted and fail with an error (as mocking final classes does).

when(mock.finalMethod()) will invoke the real implementation of finalMethod. In some cases, this may wind up accidentally doing what’s intended:

when(converter.convert(a)).thenReturn(b);

convert is final, but under the hood, calls doForward, so we wind up mocking that method instead.

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("CannotMockMethod") to the enclosing element.