handle.close();
        assertTrue(handle.isStale(), "Closed handle reports stale");
    }

    @Test
    @DisplayName("getSessionKey propagates CIFSException from session acquisition")
    void getSessionKey_exception_propagates() throws Exception {
        SmbPipeHandleImpl handle = newHandleWithBasicStubs(0, "\\\\pipe\\\\sess");
        when(pipe.ensureTreeConnected()).thenReturn(tree);
        when(tree.acquire()).thenReturn(tree);