}

    @Test
    void testIsVerifyFailed() {
        // Simulate verification failed status
        when(mockResponse.isVerifyFailed()).thenReturn(true);
        assertTrue(mockResponse.isVerifyFailed());

        // Verify the method was called
        verify(mockResponse, times(1)).isVerifyFailed();
    }

    @Test
    void testIsError() {
        // Test initial state (should be false by default for a fresh mock)

     */
    boolean verifySignature(byte[] buffer, int i, int size);

    /**
     * Checks if signature verification failed.
     *
     * @return whether signature verification failed
     */
    boolean isVerifyFailed();

    /**
     * Checks if the response indicates an error.
     *
     * @return whether the response is an error
     */
    boolean isError();

    /**
     * Set error status
     */

    public final int getErrorCode() {
        return getStatus();
    }

    /**
     *
     * @return whether signature verification failed
     */
    @Override
    public final boolean isVerifyFailed() {
        return this.verifyFailed;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.util.transport.Response#getGrantedCredits()
     */
    @Override