}

    @Test
    @DisplayName("handle: sets NameCallback and PasswordCallback on happy path")
    void testHandleSetsNameAndPasswordHappyPath() throws Exception {
        JAASAuthenticator auth = new JAASAuthenticator("DOM", "user", "pass");
        NameCallback nc = new NameCallback("user:");
        PasswordCallback pc = new PasswordCallback("pass:", false);

        // Exercise callback handler with both callbacks supplied

import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.Configuration;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;