private Credentials creds;

    /**
     * Constructs a CIFS context wrapper with custom credentials.
     *
     * @param delegate the context to wrap
     * @param creds
     *            Credentials to use
     */
    public CIFSContextCredentialWrapper(final AbstractCIFSContext delegate, final Credentials creds) {
        super(delegate);
        this.creds = creds;
    }

    /**
     *

    void testWithCredentials() {
        // Given
        Credentials creds = mock(Credentials.class);
        CIFSContext newContext = mock(CIFSContext.class);
        when(mockContext.withCredentials(creds)).thenReturn(newContext);

        // When
        CIFSContext context = mockContext.withCredentials(creds);

        // Then
        assertEquals(newContext, context);

        Runtime.getRuntime().addShutdownHook(this);
    }

    /**
     * @param creds the credentials to use
     * @return a wrapped context with the given credentials
     */
    @Override
    public CIFSContext withCredentials(final Credentials creds) {
        return new CIFSContextCredentialWrapper(this, creds);
    }

    /**
     *
     * {@inheritDoc}
     *

/_artifacts/
/_rundir/

# Go dependencies installed on Jenkins
/_gopath/

# Config directories created by gcloud and gsutil on Jenkins
/.config/gcloud*/
/.gsutil/

# CoreOS stuff
/cluster/libvirt-coreos/coreos_*.img

# Downloaded Kubernetes binary release
/kubernetes/

# direnv .envrc files
.envrc

# Downloaded kubernetes binary release tar ball
kubernetes.tar.gz

     */
    CIFSContext withGuestCrendentials();

    /**
     * Create a child context with specified credentials
     *
     * @param creds the credentials to use
     * @return a child context using using the given credentials
     */
    CIFSContext withCredentials(Credentials creds);

    /**
     * Attempt to renew credentials after authentication failure
     *

    public boolean hasDefaultCredentials() {
        return this.delegate.hasDefaultCredentials();
    }

    @Override
    public CIFSContext withCredentials(final Credentials creds) {
        return wrap(this.delegate.withCredentials(creds));
    }

    @Override
    public CIFSContext withDefaultCredentials() {
        return wrap(this.delegate.withDefaultCredentials());
    }

    @Override

        // Arrange: null reference to the interface
        SmbRenewableCredentials creds = null;

        // Act + Assert: invoking renew() on null triggers NullPointerException
        assertThrows(NullPointerException.class, () -> {
            // Intentional NPE through dereference of a null interface reference
            creds.renew();
        });
    }

    @Test