public class SmbRandomAccessFileTest {

    // Helper: build a minimally wired instance with mocks; avoids real I/O
    private SmbRandomAccessFile newInstance(String mode, boolean smb2, boolean ntSmbsCap, boolean unshared) throws CIFSException {
        SmbFile file = mock(SmbFile.class);
        SmbTreeHandleImpl tree = mock(SmbTreeHandleImpl.class);
        Configuration cfg = mock(Configuration.class);