when(mockWriteResponse.getCount()).thenReturn(1);

        outputStream = new SmbFileOutputStream(mockFile, mockTreeHandle, mockFileHandle,
                SmbConstants.O_CREAT | SmbConstants.O_WRONLY | SmbConstants.O_TRUNC, SmbConstants.FILE_WRITE_DATA,
                SmbConstants.DEFAULT_SHARING);

        // When
        outputStream.write(65); // Write 'A'

        // Then

package ioutil

import (
	"io"
	"os"
)

// AppendFile - appends the file "src" to the file "dst"
func AppendFile(dst string, src string, osync bool) error {
	flags := os.O_WRONLY | os.O_APPEND | os.O_CREATE
	if osync {
		flags |= os.O_SYNC
	}
	appendFile, err := os.OpenFile(dst, flags, 0o666)
	if err != nil {
		return err
	}
	defer appendFile.Close()

	srcFile, err := os.Open(src)

    }

    /**
     * Test if the PIPE_TYPE_WRONLY constant has the correct value.
     */
    @Test
    void testPipeTypeWronly() {
        assertEquals(SmbConstants.O_WRONLY, SmbPipeResource.PIPE_TYPE_WRONLY, "PIPE_TYPE_WRONLY should match SmbConstants.O_WRONLY");
    }

    /**
     * Test if the PIPE_TYPE_RDWR constant has the correct value.
     */
    @Test
    void testPipeTypeRdwr() {

	var lockType int16
	switch flag {
	case syscall.O_RDONLY:
		lockType = syscall.F_RDLCK
	case syscall.O_WRONLY:
		fallthrough
	case syscall.O_RDWR:
		fallthrough
	case syscall.O_WRONLY | syscall.O_CREAT:
		fallthrough
	case syscall.O_RDWR | syscall.O_CREAT:
		lockType = syscall.F_WRLCK
	default:
		return nil, &os.PathError{
			Op:   "open",

func lockedOpenFile(path string, flag int, perm os.FileMode, lockType int) (*LockedFile, error) {
	switch flag {
	case syscall.O_RDONLY:
		lockType |= syscall.LOCK_SH
	case syscall.O_WRONLY:
		fallthrough
	case syscall.O_RDWR:
		fallthrough
	case syscall.O_WRONLY | syscall.O_CREAT:
		fallthrough
	case syscall.O_RDWR | syscall.O_CREAT:
		lockType |= syscall.LOCK_EX
	default:
		return nil, &os.PathError{
			Op:   "open",

	switch flag {
	case syscall.O_RDONLY:
		access = syscall.GENERIC_READ
	case syscall.O_WRONLY:
		access = syscall.GENERIC_WRITE
	case syscall.O_RDWR:
		fallthrough
	case syscall.O_RDWR | syscall.O_CREAT:
		fallthrough
	case syscall.O_WRONLY | syscall.O_CREAT:
		access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
	case syscall.O_WRONLY | syscall.O_CREAT | syscall.O_APPEND:
		access = syscall.FILE_APPEND_DATA
	default:

			t.Fatal(err)
		}
	}()

	// lock the file
	l, err := LockedOpenFile(f.Name(), os.O_WRONLY, 0o600)
	if err != nil {
		t.Fatal(err)
	}

	// unlock the file
	if err = l.Close(); err != nil {
		t.Fatal(err)
	}

	// try lock the unlocked file
	dupl, err := LockedOpenFile(f.Name(), os.O_WRONLY|os.O_CREATE, 0o600)
	if err != nil {
		t.Errorf("err = %v, want %v", err, nil)
	}

     */

    int PIPE_TYPE_RDONLY = SmbConstants.O_RDONLY;

    /**
     * The pipe should be opened only for writing.
     */

    int PIPE_TYPE_WRONLY = SmbConstants.O_WRONLY;

    /**
     * The pipe should be opened for both reading and writing.
     */

    int PIPE_TYPE_RDWR = SmbConstants.O_RDWR;

    /**

            // Assert
            assertNotNull(outputStream);
            verify(smbFile).openUnshared(SmbConstants.O_CREAT | SmbConstants.O_WRONLY | SmbConstants.O_TRUNC, // 82
                    SmbConstants.O_WRONLY, // 2
                    SmbConstants.DEFAULT_SHARING, // 7, not FILE_SHARE_READ (1)
                    SmbConstants.ATTR_NORMAL, // 128
                    0);
        }

     */
    static SmbFileHandleImpl openCopyTargetFile(final SmbFile dest, final int attrs, final boolean alsoRead) throws CIFSException {
        try {
            return dest.openUnshared(SmbConstants.O_CREAT | SmbConstants.O_WRONLY | SmbConstants.O_TRUNC,
                    SmbConstants.FILE_WRITE_DATA | SmbConstants.FILE_WRITE_ATTRIBUTES | (alsoRead ? SmbConstants.FILE_READ_DATA : 0),
                    SmbConstants.FILE_NO_SHARE, attrs, 0);