public void ViewModel_WhenInitialized_WithRefreshOnCollectionUpdateNotification_ShouldRefresh(
IFixture fixture,
TestSchedulers scheduler,
int[] expectedValue)
{
//arrange
var notifications = scheduler.CreateColdObservable(OnNext(200, 1));
var observer = scheduler.CreateObserver <ObservableViewModelNotification>();
var sut = new UpdatableObservableViewModelBuilderOptions <int, int[], int>(
_ => { },
ct => Task.FromResult(expectedValue),
() => notifications,
scheduler,
scheduler,
scheduler)
.UpdateAction((i, o) => () => { })
.RefreshOnCollectionUpdateNotification()
.ToViewModel();
sut.Subscribe(observer);
//act
scheduler.Start();
//assert
var expected = new ObservableViewModelNotification()
{
Status = ObservableViewModelStatus.Value,
Value = expectedValue
};
observer.Values().Last().Value.As <ObservableCollection <int> >().ShouldAllBeEquivalentTo(expectedValue);
}
public async Task ViewModel_WhenRefreshed_ShouldDisposePreviousNotificationsSubscriptions(
IFixture fixture,
TestSchedulers scheduler,
int[] values)
{
//arrange
var notifications = scheduler.CreateColdObservable <int>();
var sut = new UpdatableObservableViewModelBuilderOptions <int, int[], int>(
_ => { },
ct => Task.FromResult(values),
() => notifications,
scheduler,
scheduler,
scheduler)
.UpdateAction((i, o) => () => { })
.ToViewModel();
const long disposeTime = 805;
//act
scheduler.Start();
await sut.RefreshAsync();
//we advance to an arbitrary time
scheduler.AdvanceBy(disposeTime);
//the subscription to the new observable should happen here
//the first subscription should be dispose at the current scheduler time
await sut.RefreshAsync();
//assert
notifications.Subscriptions[0].Unsubscribe.Should().Be(disposeTime);
}
public async Task ViewModel_WhenEmpty_WithRefreshOnCollectionUpdateNotification_ShouldRefresh(
IFixture fixture,
TestSchedulers scheduler,
int[] expectedValue)
{
//arrange
var notifications = scheduler.CreateColdObservable(OnNext(200, 1));
var observer = scheduler.CreateObserver <ObservableViewModelNotification>();
var count = 0;
var sut = new UpdatableObservableViewModelBuilderOptions <int, int[], int>(
_ => { },
ct => Task.FromResult(expectedValue),
() => notifications,
scheduler,
scheduler,
scheduler)
.UpdateAction((i, o) => () => { })
.RefreshOnCollectionUpdateNotification()
.EmptyPredicate(_ => ++ count == 1)
.ToViewModel();
sut.Subscribe(observer);
//act
await sut.RefreshAsync();
scheduler.AdvanceBy(300);
//assert
observer.Values().Last().Value.As <ObservableCollection <int> >().ShouldAllBeEquivalentTo(expectedValue);
}
public async Task ViewModel_ShouldReturnCorrectValue(
IFixture fixture,
TestSchedulers scheduler)
{
//arrange
const int insertionIndex = 5;
var initialList = fixture.CreateMany <int>(10).ToArray();
var addedList = fixture.CreateMany <int>(10).ToArray();
var expected = initialList.Take(insertionIndex)
.Concat(addedList.Reverse())
.Concat(initialList.Skip(insertionIndex))
.ToArray();
var notifications = scheduler.CreateColdObservable(addedList.Select((i, ii) => OnNext(Subscribed + 1 + ii, i)).ToArray());
var sut = new UpdatableObservableViewModelBuilderOptions <int, int[], int>(
_ => { },
ct => Task.FromResult(initialList),
() => notifications,
scheduler,
scheduler,
scheduler)
.UpdateAction((i, o) => () => o.Insert(insertionIndex, i))
.ToViewModel();
//act
scheduler.Start();
await sut.RefreshAsync();
scheduler.AdvanceBy(Disposed);
var actual = ((IObservableViewModel <ObservableCollection <int> >)sut).CurrentValue;
//assert
actual.ShouldAllBeEquivalentTo(expected);
}
public void Execute_WhenExuctingWhileOtherExecutionIsOccuring_ShouldCancelPreviousExecution(
[Frozen] TestSchedulers schedulers)
{
//arrange
var firstObservable = schedulers.CreateColdObservable(OnNext(200, new object()), OnNext(300, new object()));
var secondObservable = schedulers.CreateColdObservable(OnNext(400, new object()), OnNext(500, new object()));
var i = 0;
Func <object, IObservable <object> > observableFactory = _ => ++ i == 1 ? firstObservable : secondObservable;
var sut = new ObservableMvvmCommand <object, object>(observableFactory, schedulers, schedulers, "name", new AlwaysTrueCanExecuteStrategy <object>());
//act
sut.Execute(null);
schedulers.AdvanceBy(250);
sut.Execute(null);
schedulers.AdvanceBy(350);
//assert
firstObservable.Subscriptions.Single().Unsubscribe.Should().Be(250);
}
