assertTrue(ALWAYSACTIVE.accept(mockFile));
        }
    }

    @Nested
    @DisplayName("Invalid input – null file handling")
    class InvalidPath {
        @Test
        void acceptWithNullThrows() {
            SmbFileFilter throwOnNull = new SmbFileFilter() {
                @Override
                public boolean accept(SmbFile file) throws SmbException {
                    if (file == null) {