}

        w.join(2000);
        assertFalse(w.isAlive(), "WriterThread should stop after -1 sentinel");
    }

    @Test
    @DisplayName("WriterThread surfaces SmbException via checkException")
    void writerThread_propagates_exception() throws Exception {
        // Arrange
        WriterThread w = new WriterThread();
        SmbFileOutputStream out = mock(SmbFileOutputStream.class);

        }
    }

}

class WriterThread extends Thread {

    private byte[] b;
    private int n;
    private boolean ready;
    private SmbFileOutputStream out;

    private SmbException e = null;

    WriterThread() {
        super("JCIFS-WriterThread");
        this.ready = false;
    }

    /**
     * @return the ready
     */

            }
        });
        writerThread.start();

        // Give threads a moment to reach the latch
        Thread.sleep(50);

        // Release all threads to start simultaneously
        startLatch.countDown();

        // Wait for writer thread to complete
        writerThread.join(1000);

        // Wait for all reader threads to complete

    }

    class WriterThread extends Thread {
        byte[] b;
        int n;
        long off;
        boolean ready;
        SmbFile dest;
        SmbException e = null;
        boolean useNTSmbs;
        SmbComWriteAndX reqx;
        SmbComWrite req;
        ServerMessageBlock resp;

        WriterThread() throws SmbException {

             */
            if (this.fileLocator.overlaps(dest.getLocator())) {
                throw new SmbException("Source and destination paths overlap.");
            }

            final WriterThread w = new WriterThread();
            w.setDaemon(true);

            try {
                w.start();
                // use commonly acceptable buffer size