verify(mockConfig, never()).getOemEncoding();
        }

        @Test
        @DisplayName("getOEMBytes should throw RuntimeCIFSException for unsupported encoding")
        void testGetOEMBytesWithUnsupportedEncoding() {
            // Given
            Configuration mockConfig = mock(Configuration.class);
            when(mockConfig.getOemEncoding()).thenReturn("INVALID-ENCODING");

            // When & Then