public void DeleteTroopObject_WhenTroopObjectFailsToRemoveFromCity_DoesNotAddUnitsBackToStub( [Frozen] ITroopStub stub, [Frozen] ISimpleStub unitsToRetreat, StationedPartialTroopObjectInitializer troopInitializer) { unitsToRetreat.TotalCount.Returns <ushort>(1); stub.State.Returns(TroopState.Stationed); stub.RemoveFromFormation(FormationType.Defense, Arg.Any <ISimpleStub>()).Returns(true); var newStub = Substitute.For <ITroopStub>(); newStub.TroopId.Returns <ushort>(5); stub.City.CreateTroopStub().Returns(newStub); stub.City.Troops.Remove(newStub.TroopId).Returns(false); ITroopObject troopObject; troopInitializer.GetTroopObject(out troopObject); troopInitializer.DeleteTroopObject(); stub.DidNotReceiveWithAnyArgs().AddAllToFormation(FormationType.Defense, null); }