assertThat(url, is(nullValue()));
}
public void custom_validation_should_fail() {
WebResponse response = post("?notNull=abc&positive=5&fail=true");
assertThat(response.status(), equalTo(HttpServletResponse.SC_OK));
FormResponseJson res = response.to(FormResponseJson.class).using(Json.class);
assertThat(res.isValid(), equalTo(false));
List<FieldErrorJson> errors = res.getErrors();