// install the mocked services with TestingUtility.registerServices(..)

// The process service defined the behavior for: load() and calculate()
// * loadFormData for OtherField contains LOADED_VALUE
// * calcFormData for OtherField contains CALCULATED_VALUE

when(service.load(any(MyFormData.class))).thenReturn(loadFormData);
when(service.calculate(any(MyFormData.class))).thenReturn(calcFormData);

Form f = new Form();
f.startNew();
assertEquals(LOADED_VALUE, f.getOtherField().getValue());

f.getMyField().setValue(NEW_VALUE); //<= this triggers a calculate job

// TODO: how to tell the test he should wait on the calculate_job?

assertEquals(CALCULATED_VALUE, f.getOtherField().getValue());

verify(service, times(1)).calculate(any(MyFormData.class));

Job.getJobManager().join(ClientSyncJob.class, null);