}
    }

    private void doHandshake() throws IOException {
        connect();
        try {
            int response = parseResponseCode();
            if (response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH) {
                return;
            }
            final Type1Message type1 = (Type1Message) attemptNegotiation(response);
            if (type1 == null) {

        // Arrange
        mockResponse(HTTP_UNAUTHORIZED, "Unauthorized",
                Collections.singletonMap("WWW-Authenticate", Collections.singletonList("Basic realm=\"Test\"")),
                new ByteArrayInputStream(new byte[0]));

        // Act
        int responseCode = ntlmConnection.getResponseCode();

        // Assert
        assertEquals(HTTP_UNAUTHORIZED, responseCode);

import java.net.HttpURLConnection.HTTP_MULT_CHOICE
import java.net.HttpURLConnection.HTTP_PROXY_AUTH
import java.net.HttpURLConnection.HTTP_SEE_OTHER
import java.net.HttpURLConnection.HTTP_UNAUTHORIZED
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.internal.connection.Exchange
import okhttp3.internal.http.HTTP_PERM_REDIRECT
import okhttp3.internal.http.HTTP_TEMP_REDIRECT

        }
    }

    private void doHandshake() throws IOException, GeneralSecurityException {
        connect();
        try {
            int response = parseResponseCode();
            if (response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH) {
                return;
            }
            final NtlmMessage type1 = attemptNegotiation(response);
            if (type1 == null) {
                return; // no NTLM

import java.net.HttpURLConnection.HTTP_MULT_CHOICE
import java.net.HttpURLConnection.HTTP_PROXY_AUTH
import java.net.HttpURLConnection.HTTP_SEE_OTHER
import java.net.HttpURLConnection.HTTP_UNAUTHORIZED
import java.net.HttpURLConnection.HTTP_UNAVAILABLE
import java.net.ProtocolException
import java.net.Proxy
import java.net.SocketTimeoutException
import java.security.cert.CertificateException

        .requestIOException()
        .exhaustResponse()
    server.enqueue(
      MockResponse
        .Builder()
        .clearHeaders()
        .code(HttpURLConnection.HTTP_UNAUTHORIZED)
        .socketHandler(body1)
        .build(),
    )
    val body =
      MockSocketHandler()
        .sendResponse("response body\n")
        .exhaustResponse()