}

    @Test
    @DisplayName("createContext returns SSPContext and interacts with CIFSContext")
    void createContext_happy_interacts_and_returns_context() throws Exception {
        // Arrange
        TestCredentials creds = new TestCredentials("D", false, false, new Subject(), false);

        // Act
        SSPContext ctx = creds.createContext(mockContext, "TARGET", "host", new byte[0], true);

        SmbUnsupportedOperationException ex =
                assertThrows(SmbUnsupportedOperationException.class, () -> auth.createContext(tc, null, "SERVER", new byte[0], false));
        assertTrue(ex.getMessage().contains("Cannot use netbios/short names"));
    }

    @Test
    @DisplayName("createContext: no Kerberos in initial token and no fallback -> throws")
    void createContext_noKerberosNoFallback_throws() throws CIFSException {

    }

    /**
     *
     * {@inheritDoc}
     *
     * @see jcifs.smb.NtlmPasswordAuthenticator#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 {

        } else {
            CreateContextRequest[] newContexts = new CreateContextRequest[this.createContexts.length + 1];
            System.arraycopy(this.createContexts, 0, newContexts, 0, this.createContexts.length);
            newContexts[this.createContexts.length] = context;
            this.createContexts = newContexts;
        }
    }

    /**
     * Add a lease V1 context to this request

     * @param doSigning whether message signing should be enabled
     * @return a new SSP authentication context
     * @throws SmbException if context creation fails
     */
    SSPContext createContext(CIFSContext tc, String targetDomain, String host, byte[] initialToken, boolean doSigning) throws SmbException;

    /**
     * Get the security subject associated with these credentials.

        }

        if (s == null) {
            return this.credentials.createContext(getContext(), tdomain, host, negoResp.getSecurityBlob(), doSigning);
        }

        try {
            final String hostName = host;
            return Subject.doAs(s, (PrivilegedExceptionAction<SSPContext>) () -> getCredentials().createContext(getContext(), tdomain,
                    hostName, negoResp.getSecurityBlob(), doSigning));

     * @return the createContexts
     */
    public CreateContextResponse[] getCreateContexts() {
        return this.createContexts;
    }

    /**
     * Get the lease V1 context response if present
     * @return the lease V1 context or null if not present
     */
    public LeaseV1CreateContextResponse getLeaseV1Context() {
        if (this.createContexts != null) {

        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");

        // Test encryption context
        NegotiateContextResponse enc = Smb2NegotiateResponse.createContext(EncryptionNegotiateContext.NEGO_CTX_ENC_TYPE);
        assertNotNull(enc);
        assertTrue(enc instanceof EncryptionNegotiateContext);

        // Test preauth context
        NegotiateContextResponse preauth = Smb2NegotiateResponse.createContext(PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE);
        assertNotNull(preauth);

                            + " (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) {