import 'package:rules_of_living/service/engine_service.dart'; import 'package:rules_of_living/service/simulation_service.dart'; import 'package:rules_of_living/src/Simulation.dart'; import 'package:test/test.dart'; import 'package:mockito/mockito.dart'; class MockSimulation extends Mock implements Simulation {} class MockEngineService extends Mock implements EngineService {} void main() { SimulationService sut; MockSimulation mockSim = MockSimulation(); setUp(() => sut = SimulationService(MockEngineService(), mockSim)); test("calling save calls through to Simulation.saveSnapshot", () { sut.save(); verify(mockSim.saveSnapshot()); }); test("calling load calls through to Simulation.loadSnapshot", () { sut.load(); verify(mockSim.loadSnapshot()); }); }