return resourceId;
    }

    /**
     * Mark a resource as closed
     *
     * @param resourceId the resource ID
     */
    public void markClosed(String resourceId) {
        ResourceHolder holder = activeResources.get(resourceId);
        if (holder != null) {
            holder.closed = true;
            totalReleased.incrementAndGet();

        int available = stream.available();
        assertEquals(0, available, "Disconnected/server-closed should yield 0 available");

        verify(fd, times(1)).markClosed();
        verify(tree, times(1)).close();
        verify(fd, times(1)).close();
    }

    @Test
    @DisplayName("available() on SMB1 returns reported available when connected")

        assertTrue(reqCap.getValue() instanceof Smb2ChangeNotifyRequest, "SMB2 request must be used");
        verify(tree, times(1)).close(); // try-with-resources must close
        verify(handle, never()).markClosed();
        verify(tree, never()).hasCapability(anyInt()); // not checked on SMB2
    }

    // SMB1 path: without CAP_NT_SMBS it should throw SmbUnsupportedOperationException
    @Test

        assertFalse(h.isValid());

        // Mark closed makes it invalid
        when(tree.isConnected()).thenReturn(true);
        assertTrue(h.isValid());
        h.markClosed();
        assertFalse(h.isValid());
    }

    @Test
    @DisplayName("getFid/getFileId throw SmbException when invalid")
    void getters_throw_whenInvalid() {