import org.springframework.security.oauth2.client.registration.ClientRegistration;

/**
 * Prints whether a Spring OAuth2 <i>client</i> registration requires PKCE out of the box.
 * Run against spring-security-oauth2-client 6.5.1 and 7.1.1, it shows the default flipping
 * in the same release that flipped it on the authorization server.
 */
public class ClientPkceDefault {
    public static void main(String[] args) {
        ClientRegistration.ClientSettings cs =
                ClientRegistration.ClientSettings.builder().build();
        System.out.println("ClientRegistration.ClientSettings.requireProofKey = "
                + cs.isRequireProofKey());
    }
}