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_WithObservableYielding3Values_ShouldReturnCorrectResult(
object value1,
object value2,
object value3,
TestSchedulers schedulers,
ThrowingTestScheduler scheduler)
{
//arrange
var observable = scheduler.CreateColdObservable(OnNext(10, value1),
OnNext(20, value2),
OnNext(30, value3),
OnCompleted(40, new object()));
var observer = scheduler.CreateObserver <object>();
var sut = new ObservableMvvmCommand <object, object>(o => observable, schedulers, schedulers, "name", new AlwaysTrueCanExecuteStrategy <object>(), doObserver: () => observer, doScheduler: ImmediateScheduler.Instance);
//act
sut.Execute(null);
//allow any work scheduled with the schedulers to advance
schedulers.AdvanceBy(200);
//allow notifications to advance
scheduler.AdvanceBy(200);
//assert
observer.Messages.AssertEqual(OnNext(10, value1),
OnNext(20, value2),
OnNext(30, value3),
OnCompleted(40, new object()));
}
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);
}
public void Execute_ShouldCallNotifyExecuting(
[Frozen] Mock <ICanExecuteStrategy <object> > canExecute,
ObservableMvvmCommand <object, object> sut,
[Frozen] object obj,
TestSchedulers schedulers)
{
//arrange
//act
sut.Execute(obj);
schedulers.AdvanceBy(200);
//assert
canExecute.Verify(c => c.NotifyExecuting(obj), Times.Once());
}
public void CanExecuteChanged_WhenCanExecuteStrategyObservableYieldValue_ShouldBeRaiseCanExecute(
[Frozen] Subject <Unit> canExecuteChanged,
[Frozen] TestSchedulers schedulers,
ObservableMvvmCommand <object, object> sut
)
{
//arrange
sut.MonitorEvents();
//act
canExecuteChanged.OnNext(Unit.Default);
schedulers.AdvanceBy(200);
//assert
sut.ShouldRaise("CanExecuteChanged");
}
public void Execute_WhenComplete_ShouldCallNotifyNotExecuting(
Mock <ICanExecuteStrategy <object> > canExecute,
object obj,
TestSchedulers schedulers)
{
//arrange
var value = Observable.Return(obj, ImmediateScheduler.Instance);
var sut = new ObservableMvvmCommand <object, object>(_ => value, schedulers, schedulers, "name", canExecute.Object);
//act
sut.Execute(obj);
schedulers.AdvanceBy(200);
//assert
canExecute.Verify(c => c.NotifyNotExecuting(obj), Times.Once());
}
public void Execute_ShouldExecuteObservable(
TestSchedulers schedulers)
{
//arrange
bool observableCalled = false;
var value = Observable.Return(Unit.Default, ImmediateScheduler.Instance)
.Do(unit => observableCalled = true);
var sut = new ObservableMvvmCommand <object, System.Reactive.Unit>(o => value, schedulers, schedulers, "name", new AlwaysTrueCanExecuteStrategy <object>());
//act
sut.Execute(null);
schedulers.AdvanceBy(200);
//assert
observableCalled.Should().BeTrue();
}
public void Execute_WithError_ShouldExecuteErrorTask(
object obj,
Exception expected,
TestSchedulers schedulers)
{
//arrange
Exception actual = null;
var value = Observable.Throw <object>(expected, ImmediateScheduler.Instance);
Func <CancellationToken, Exception, Task> errorTask = async(ct, ex) => actual = ex;
var sut = new ObservableMvvmCommand <object, object>(_ => value, schedulers, schedulers, "name", new AlwaysTrueCanExecuteStrategy <object>(), errorTask: errorTask);
//act
sut.Execute(obj);
schedulers.AdvanceBy(200);
//assert
actual.Should().Be(expected);
}
public void Execute_WhenErrorInErrorAction_ShouldCallNotifyNotExecuting(
Mock <ICanExecuteStrategy <object> > canExecute,
Exception error,
object obj,
TestSchedulers schedulers)
{
//arrange
var value = Observable.Throw <object>(error, ImmediateScheduler.Instance);
Func <CancellationToken, Exception, Task> errorTask = async(ct, ex) =>
{
throw new Exception();
};
var sut = new ObservableMvvmCommand <object, object>(_ => value, schedulers, schedulers, "name", canExecute.Object, errorTask: errorTask);
//act
sut.Execute(obj);
schedulers.AdvanceBy(200);
//assert
canExecute.Verify(c => c.NotifyNotExecuting(obj), Times.Once());
}
public void Execute_ShouldCallOnError(
Exception expected,
TestSchedulers schedulers)
{
//arrange
Exception actual = null;
var value = Observable.Throw <object>(expected, ImmediateScheduler.Instance);
var sut = new ObservableMvvmCommand <object, object>(
o => value,
schedulers,
schedulers,
"name",
new AlwaysTrueCanExecuteStrategy <object>(),
doObserver: () => Observer.Create <object>(_ => { }, e => actual = e),
doScheduler: ImmediateScheduler.Instance);
//act
sut.Execute(null);
schedulers.AdvanceBy(200);
//assert
actual.Should().Be(expected);
}
public void Execute_ShouldCallCallback(
object expected,
TestSchedulers schedulers)
{
//arrange
object actual = null;
var value = Observable.Return(expected, ImmediateScheduler.Instance);
var sut = new ObservableMvvmCommand <object, object>(
o => value,
schedulers,
schedulers,
"name",
new AlwaysTrueCanExecuteStrategy <object>(),
doObserver: () => Observer.Create <object>(o => actual = o),
doScheduler: ImmediateScheduler.Instance);
//act
sut.Execute(null);
schedulers.AdvanceBy(200);
//assert
actual.Should().Be(expected);
}
public void Execute_ShouldBeCalledWithArg(
IObservable <object> value,
object arg,
TestSchedulers schedulers)
{
//arrange
object actual = null;
var sut = new ObservableMvvmCommand <object, object>(o =>
{
actual = o;
return(value);
},
schedulers,
schedulers,
"name",
new AlwaysTrueCanExecuteStrategy <object>());
//act
sut.Execute(arg);
schedulers.AdvanceBy(200);
//assert
actual.Should().Be(arg);
}
