byte[] buffer = createValidBuffer(expectedFilename, "FILE-N~1.TXT", true);

        // Decode
        fileBothDirectoryInfo.decode(buffer, 0, buffer.length);

        // Verify
        assertEquals(expectedFilename, fileBothDirectoryInfo.getFilename());
    }

    // Helper methods to create valid buffer data
    private byte[] createValidBuffer(String filename, String shortName, boolean unicode) {