public void After_it_is_subscribed_a_Feature_is_available_if_an_initialization_function_is_supplied()
{
var feature = new Feature<string>(() => "hello");
feature.Subscribe(f => { });
Assert.That(feature.Availability.First(), Is.True);
}
public void Feature_observable_returns_feature_from_object_ctor()
{
var feature = new Feature<string>((object) "hello");
feature.Subscribe(v => { });
Assert.That(feature.First(), Is.EqualTo("hello"));
}
public void Feature_observable_returns_feature_from_object_ctor_when_passed_a_delegate()
{
Func<object> getter = () => "hello";
var feature = new Feature<string>(getter);
feature.Subscribe(v => { });
Assert.That(feature.First(), Is.EqualTo("hello"));
}
public void Feature_starts_in_an_unavailable_state_if_no_instance_is_provided()
{
var feature = new Feature<string>();
var scheduler = new TestScheduler();
bool wasAvailable = false;
feature.Availability.Timeout(TimeSpan.FromMinutes(5), scheduler).Subscribe(i => wasAvailable = i, ex => { });
scheduler.AdvanceBy(TimeSpan.FromDays(1).Ticks);
Assert.That(wasAvailable, Is.False);
}
public void Feature_initialization_can_time_out()
{
string result = null;
var feature = new Feature<string>(() =>
{
Thread.Sleep(TimeSpan.FromSeconds(1));
return "hi";
});
var featureWithTimeout = feature.Timeout(TimeSpan.FromSeconds(.1));
featureWithTimeout.Subscribe(s => result = s, ex => { /* ignore the TimeoutException */ });
Assert.That(result, Is.Null);
}
public void A_feature_can_be_subscribed_before_it_is_registered_and_when_it_is_later_initialized_subscribers_will_be_notified()
{
string result = null;
var feature = new Feature<string>();
feature.Subscribe(s => result = s);
Assert.That(result, Is.Null);
feature.OnNext("hello");
Assert.That(result, Is.EqualTo("hello"));
}
public void When_a_feature_fails_to_load_the_error_is_published_to_OnError_and_not_thrown()
{
var feature = new Feature<string>(() => { throw new ArgumentException("oops!"); });
Exception error = null;
string result = null;
feature.Subscribe(f => result = f, ex => error = ex);
Assert.That(result, Is.Null);
Assert.That(error, Is.InstanceOf<ArgumentException>());
}
public void A_Feature_whose_instance_is_an_IFeature_is_unavailable_until_the_IFeature_is_available()
{
var inner = new Feature<string>();
var outer = new Feature<Feature<string>>(inner);
bool available = false;
outer.Availability.Subscribe(a => available = a);
Assert.That(available, Is.False);
inner.OnNext("hello");
Assert.That(available, Is.True);
}
public void When_wrapped_class_duck_types_IFeature_then_its_Availability_is_mirrored_by_Feature_of_Ts_Availability()
{
var feature = new Feature<DuckTypedFeature>(() => new DuckTypedFeature());
DuckTypedFeature.ActivateCount.Should().Be(0);
feature.Availability
.SubscribeOn(Scheduler.Immediate)
.Subscribe();
DuckTypedFeature.ActivateCount.Should().Be(1);
}
public void When_true_availability_has_been_signaled_then_IsAvailable_is_true()
{
var feature = new Feature<ActivatableFeature>(new ActivatableFeature(Observable.Return(true)));
Assert.That(feature.IsAvailable(), Is.True);
}
public void When_no_availability_has_been_signaled_then_IsAvailable_is_false()
{
var subject = new ReplaySubject<bool>();
var feature = new Feature<ActivatableFeature>(new ActivatableFeature(subject));
Assert.That(feature.IsAvailable(), Is.False);
}
public void A_Feature_name_can_be_overridden_using_DisplayNameAttribute()
{
var feature = new Feature<SomethingWithDisplayName>();
Assert.That(feature.Name, Is.EqualTo("hello"));
}
public void A_Feature_has_a_name_based_on_the_type()
{
var feature = new Feature<string>();
Assert.That(feature.Name, Is.EqualTo("System.String"));
}
public void A_Feature_whose_instance_is_an_IFeature_produces_a_value_when_the_IFeature_is_available()
{
var inner = new Feature<string>();
var outer = new Feature<Feature<string>>(inner);
Feature<string> result = null;
outer.Subscribe(v => result = v);
inner.OnNext("hello");
Assert.That(outer.Availability.First(), Is.EqualTo(true));
Assert.That(outer.First().First(), Is.EqualTo("hello"));
}