public UpgradeInvoker(Lookup protoLookup, @Nullable Consumer<LookupContext> contextConsumer) {
        super(protoLookup, contextConsumer);
    }

    @Override
    protected UpgradeContext createContext(InvokerRequest invokerRequest) {
        return new UpgradeContext(
                invokerRequest, (UpgradeOptions) invokerRequest.options().orElse(null));
    }

    @Override

        public CredentialsInternal clone() {
            // For testing purposes, return this instance (allowed by return type)
            return this;
        }

        @Override
        public SSPContext createContext(CIFSContext tc, String targetDomain, String host, byte[] initialToken, boolean doSigning)
                throws SmbException {
            // Not used within these tests
            throw new SmbException("not used in tests");

                            + " (data start: " + ncpos + ", length: " + dataLen + ", buffer size: " + buffer.length + ")");
                }

                final NegotiateContextResponse ctx = createContext(type);
                if (ctx != null) {
                    try {
                        ctx.decode(buffer, ncpos, dataLen);
                        contexts[i] = ctx;
                    } catch (Exception e) {

    public ShellInvoker(Lookup protoLookup, @Nullable Consumer<LookupContext> contextConsumer) {
        super(protoLookup, contextConsumer);
    }

    @Override
    protected LookupContext createContext(InvokerRequest invokerRequest) {
        return new LookupContext(invokerRequest, true, invokerRequest.options().orElse(null));
    }

    public static final int OK = 0; // OK

    }

    /**
     *
     * {@inheritDoc}
     *
     * @see jcifs.smb.CredentialsInternal#createContext(jcifs.CIFSContext, java.lang.String, java.lang.String, byte[],
     *      boolean)
     */
    @Override
    public SSPContext createContext(CIFSContext tc, String targetDomain, String host, byte[] initialToken, boolean doSigning)
            throws SmbException {
        checkNotClosed();

        // Use separate contexts for different operations
        CIFSContext createContext = createFreshContext();
        String sourceFileName = "source_" + timestamp + ".txt";
        String targetFileName = "target_" + timestamp + ".txt";

        SmbFile sourceFile = new SmbFile(baseUrl + "shared/" + sourceFileName, createContext);

        // Create source file with content

            clientCreds = manager.createCredential(this.clientName, userLifetime, mechOid, GSSCredential.INITIATE_ONLY);
        } else {
            this.clientName = null;
        }

        this.gssContext = manager.createContext(this.serviceName, mechOid, clientCreds, contextLifetime);

        this.gssContext.requestAnonymity(false);
        this.gssContext.requestSequenceDet(false);
        this.gssContext.requestConf(false);

        Properties oldProps = new Properties();
        oldProps.putAll(System.getProperties());
        ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
        try (C context = createContext(invokerRequest)) {
            if (contextConsumer != null) {
                contextConsumer.accept(context);
            }
            try {
                if (context.containerCapsule != null

        lenient().when(gssManager.createName(anyString(), any(), any())).thenReturn(serviceName);
        lenient().when(gssManager.createName(anyString(), any())).thenReturn(serviceName);
        lenient().when(gssManager.createContext(any(), any(), any(), anyInt())).thenReturn(gssContext);

        // Create Kerb5Context with mocked dependencies
        ctx = new Kerb5Context("host.example", "cifs", null, 0, 0, null);
    }

    @AfterEach

        assertThrows(IllegalStateException.class, () -> {
            // This would normally be called during authentication
            auth.createContext(null, null, "host", null, false);
        });
    }

    /**
     * Test TTL with different constructor types
     */
    @Test