@ParameterizedTest
    @ArgumentsSource(SslTransportLayerArgumentsProvider.class)
    public void testClientAuthenticationDisabledNotProvided(Args args) throws Exception {
        args.sslServerConfigs.put(BrokerSecurityConfigs.SSL_CLIENT_AUTH_CONFIG, "none");

        CertStores.KEYSTORE_PROPS.forEach(args.sslClientConfigs::remove);
        verifySslConfigs(args);
    }
Tests that server accepts connections from a client that does not provide
a certificate if client authentication is disabled
clients/src/test/java/org/apache/kafka/common/network/SslTransportLayerTest.java