@Test
public void testDirectCaller() throws Exception {

    interceptor.preHandle(request, response, new Object());
    CallMetadata callMetadata = expectCallMetadataAuthentication();
    assertThat(callMetadata.getCallers()).hasSize(1);
    assertThat(callMetadata.getCallers().get(0).getId()).isEqualTo(MY_DIRECT_CALLER);
    assertThat(callMetadata.getCallers().get(0).getCallerType()).isEqualTo(CallerType.Unknown);
}