@Test
void testAuthenticateRequestNoSignature() {

    URL url = URL.valueOf("dubbo://10.10.10.10:2181")
            .addParameter(Constants.ACCESS_KEY_ID_KEY, "ak")
            .addParameter(CommonConstants.APPLICATION_KEY, "test")
            .addParameter(Constants.SECRET_ACCESS_KEY_KEY, "sk");
    Invocation invocation = new RpcInvocation();
    AccessKeyAuthenticator helper = new AccessKeyAuthenticator();
    assertThrows(RpcAuthenticationException.class, () -> helper.authenticate(invocation, url));
}