}
        }
        return pipeIn;
    }

    /**
     * Return the <code>OutputStream</code> used to write
     * information to this pipe instance. The act of writing data
     * to this stream will result in response data recieved in the
     * <code>InputStream</code> associated with this Named Pipe

        // Arrange: first ensureTreeConnected comes from pipe
        when(pipe.ensureTreeConnected()).thenReturn(tree);
        when(tree.acquire()).thenReturn(tree); // method returns itself per implementation

        // Act: call twice
        try (SmbTreeHandleImpl t1 = target.ensureTreeConnected(); SmbTreeHandleImpl t2 = target.ensureTreeConnected()) {
            assertSame(tree, t1);
            assertSame(tree, t2);
        }

      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability

      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability

        byte[] b = new byte[10];
        // Fill with non-zero to verify zeroing on release
        for (int i = 0; i < b.length; i++) {
            b[i] = (byte) (i + 1);
        }

        // Act: release should zero immediately to avoid leaks
        impl.releaseBuffer(b);

        // Assert: original array is zeroed in-place
        for (byte value : b) {

        SmbRandomAccessFile raf = spy(newInstance("rw", false, true, false));
        SmbFileHandleImpl fh = mock(SmbFileHandleImpl.class);
        doReturn(fh).when(raf).ensureOpen();

        // Act
        raf.open();

        // Assert: open() ensures handle and closes it via try-with-resources
        verify(raf, times(1)).ensureOpen();
        verify(fh, times(1)).close();
    }

    @Test

        when(this.mechContext.getFlags()).thenReturn(0x1234);
        when(this.mechContext.initSecContext(any(byte[].class), eq(0), eq(0))).thenReturn(new byte[] { 0x01, 0x02 });

        // Act: len==0 triggers initial token construction
        byte[] out = ctx.initSecContext(null, 0, 0);

        // Assert: returns a SPNEGO token (opaque here but non-null/non-empty)
        assertNotNull(out);

        // Mock tree and ensure it is returned by getSmbTree
        SmbTreeImpl tree = mock(SmbTreeImpl.class);
        doReturn(tree).when(session).getSmbTree(eq("LOGON$"), isNull());

        // Act
        session.treeConnectLogon();

        // Assert: treeConnect invoked once with null params
        verify(tree, times(1)).treeConnect(isNull(), isNull());

    @Test
    @DisplayName("ensureDFSResolved forwards to tree connection with locator")
    void ensureDFSResolvedDelegates() throws Exception {
        // Confirms DFS resolution is delegated with the correct locator
        // Act
        handle.ensureDFSResolved();
        // Assert & interaction verify
        verify(treeConnection).ensureDFSResolved(resourceLoc);
    }

    @Test

      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability