SmbSessionImpl session = new SmbSessionImpl(mockContext, "testhost", "testdomain", mockTransport);

        // Add some trees
        SmbTreeImpl tree1 = session.getSmbTree("share1", null);
        SmbTreeImpl tree2 = session.getSmbTree("share2", null);
        assertNotNull(tree1);
        assertNotNull(tree2);

        // When - Release session to trigger cleanup
        session.release();

        // Session starts with usage count > 0
        assertTrue(session.isInUse(), "Session should be in use initially");

        // Create and release trees
        SmbTreeImpl tree = session.getSmbTree("share1", null);
        assertNotNull(tree, "Tree should be created");
        tree.release();

        // Release the session (back to initial state)
        session.release();