* Expects the server to respond with a 'WWW-Authenticate' header containing a Type 2 message.
     * @throws IOException
     */
    @Test
    public void testAuthenticate_Type1Message() throws IOException {
        // Setup: "Authorization" header with a Type 1 message
        when(mockRequest.getHeader("Authorization")).thenReturn("NTLM " + type1MessageBase64);

        // Execute