public IObservable <ITransition> Start(IFetchObservables fetch)
=> fetch.GetSingle <TInterface>()
.SingleAsync()
.SelectMany(entity => entity == null
? Observable.Return(Unit.Default)
: dataSource.UpdateWithConflictResolution(convertToThreadsafeEntity(entity)).Select(_ => Unit.Default))
.Select(_ => FinishedPersisting.Transition(fetch));
public void ThrowsWhenUpdateWithConflictResolutionThrows()
{
var entity = new TestModel();
var observables = createObservables(entity);
dataSource.UpdateWithConflictResolution(Arg.Any <IThreadSafeTestModel>()).Returns(
Observable.Throw <IConflictResolutionResult <IThreadSafeTestModel> >(new TestException()));
Action startingState = () => state.Start(observables).SingleAsync().Wait();
startingState.Should().Throw <TestException>();
}
