assertEquals(0x5678, testBlock.getPid());
        }

        @Test
        @DisplayName("Test UID property")
        void testUidProperty() {
            testBlock.setUid(0x9ABC);
            assertEquals(0x9ABC, testBlock.getUid());
        }

        @Test
        @DisplayName("Test MID property")
        void testMidProperty() {
            testBlock.setMid(0xDEF0L);

			utimes(path, atime, mtime, callback) { callback(enosys()); },
		};
	}

	if (!globalThis.process) {
		globalThis.process = {
			getuid() { return -1; },
			getgid() { return -1; },
			geteuid() { return -1; },
			getegid() { return -1; },
			getgroups() { throw enosys(); },
			pid: -1,
			ppid: -1,
			umask() { throw enosys(); },
			cwd() { throw enosys(); },
			chdir() { throw enosys(); },

        }
    }

    @Test
    @DisplayName("Test setUid method")
    void testSetUid() {
        // Given
        int uid = 1000;
        doNothing().when(messageBlock).setUid(uid);

        // When
        messageBlock.setUid(uid);

        // Then
        verify(messageBlock).setUid(uid);
    }

    @Test
    @DisplayName("Test setUid with boundary values")
    void testSetUidWithBoundaryValues() {

            this.andx.setFlags(getFlags());
            this.andx.setFlags2(getFlags2());
            this.andx.setTid(getTid());
            this.andx.setPid(getPid());
            this.andx.setUid(getUid());
            this.andx.setMid(getMid());
            this.andx.setUseUnicode(this.isUseUnicode());

            if (this.andx instanceof AndXServerMessageBlock) {

        response.setCommand(command);
        assertEquals(command, response.getCommand());

        // Test other setter methods
        doNothing().when(response).setUid(1000);
        response.setUid(1000);
        verify(response).setUid(1000);

        doNothing().when(response).setExtendedSecurity(true);
        response.setExtendedSecurity(true);
        verify(response).setExtendedSecurity(true);

            return command;
        }

        @Override
        public void setCommand(int command) {
            this.command = command;
        }

        @Override
        public void setUid(int uid) {
            // No-op for test
        }

        @Override
        public void setExtendedSecurity(boolean extendedSecurity) {
            // No-op for test
        }

        @Override

		Method: Store,
		Mode:   0666,
	},
	{
		Name:   "bar",
		Data:   nil, // large data set in the test
		Method: Deflate,
		Mode:   0644,
	},
	{
		Name:   "setuid",
		Data:   []byte("setuid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetuid,
	},
	{
		Name:   "setgid",
		Data:   []byte("setgid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetgid,
	},
	{

			Typeflag: TypeFifo,
		},
		fm: 0600 | fs.ModeNamedPipe,
	}, {
		// setuid.
		h: &Header{
			Name:     "bin/su",
			Mode:     0755 | c_ISUID,
			Size:     23232,
			ModTime:  time.Unix(1355405093, 0),
			Typeflag: TypeReg,
		},
		fm: 0755 | fs.ModeSetuid,
	}, {
		// setguid.
		h: &Header{
			Name:     "group.txt",
			Mode:     0750 | c_ISGID,
			Size:     0,

    }

    /**
     * Gets the user identifier
     * @return the uid
     */
    public final int getUid() {
        return this.uid;
    }

    /**
     * @param uid
     *            the uid to set
     */
    @Override
    public final void setUid(final int uid) {
        this.uid = uid;
    }

    /**
     * Gets the signature sequence number

        public int getCommand() {
            return 0;
        }

        @Override
        public void setCommand(int command) {
        }

        @Override
        public void setUid(int uid) {
        }

        @Override
        public void setExtendedSecurity(boolean extendedSecurity) {
        }

        @Override
        public void setSessionId(long sessionId) {
        }