Question

My current task is to wait for a couple of fields from the backend (DB) and then modify them at my side. The backend changes will take time and in the meanwhile, I want to create a simulator and start of with my changes. Is there a design pattern, somebody can suggest, which will help me design a simulator for the backend and later on, without much code changes, allow me to port to the real backend values?

Answer 1

Look into mockito, it is pretty great. The basics are:

ClassYouAreTesting fake = mock(ClassYouAreTesting.class);
when(fake.callsSomeMethod()).thenReturn(sampleData);

You may also need to use some dependency injection so that you can pass in real (during production) or mock (during testing) objects to functions.