@Test
public void loadingResourceShouldWork() {

    final Set<String> knownClasses = ClassWithInterfaceFieldsRegistry.getKnownClasses();
    assertThat(knownClasses).isNotEmpty();
    assertThat(knownClasses).size().isEqualTo(4);
    assertThat(knownClasses).contains(
            "me.snowdrop.istio.api.test.Simple",
            "me.snowdrop.istio.api.test.Interface",
            "me.snowdrop.istio.api.test.Class",
            "me.snowdrop.istio.api.test.Map");
}