public void Activate_is_not_called_until_dependencies_return_true()
{
var activations = 0;
var notifications = new List <bool>();
var subject = new BehaviorSubject <bool>(false);
var activator = new FeatureActivator(() => activations++, dependsOn: subject);
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
subject.OnNext(false);
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
subject.OnNext(true);
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true));
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true, true));
}
public void When_there_are_multiple_subscribers_then_activate_is_not_called_repeatedly()
{
var activations = 0;
var activator = new FeatureActivator(() => activations++);
disposables.Add(activator.Subscribe(_ => { }));
disposables.Add(activator.Subscribe(_ => { }));
disposables.Add(activator.Subscribe(_ => { }));
Assert.That(activations, Is.EqualTo(1));
}
public void When_there_are_multiple_dependencies_they_must_all_return_true_before_Activate_is_called()
{
var activations = 0;
var dependency1 = new BehaviorSubject <bool>(false);
var dependency2 = new BehaviorSubject <bool>(false);
var activator = new FeatureActivator(
activate: () => activations++,
dependsOn: new[] { dependency1, dependency2 });
var notifications = new List <bool>();
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
dependency1.OnNext(true);
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
dependency2.OnNext(true);
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true));
}
public void Deactivate_is_not_called_until_after_activate_has_been_called()
{
var deactivations = 0;
var subject = new BehaviorSubject <bool>(false);
var activator = new FeatureActivator(() => { }, () => deactivations++, dependsOn: subject);
disposables.Add(activator.Subscribe(_ => { }));
subject.OnNext(true);
Assert.That(deactivations, Is.EqualTo(0));
subject.OnNext(false);
Assert.That(deactivations, Is.EqualTo(1));
}
public void Produces_a_value_each_time_the_aggregate_availability_of_dependencies_changes()
{
var dependency = new BehaviorSubject <bool>(false);
var activator = new FeatureActivator(() => { }, dependsOn: dependency);
var notifications = new List <bool>();
disposables.Add(activator.Subscribe(notifications.Add));
dependency.OnNext(false);
dependency.OnNext(false);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(false);
dependency.OnNext(false);
dependency.OnNext(false);
Assert.That(notifications.IsSameSequenceAs(false, true, false));
}
public void Produces_a_value_each_time_the_aggregate_availability_of_dependencies_changes()
{
var dependency = new BehaviorSubject<bool>(false);
var activator = new FeatureActivator(() => { }, dependsOn: dependency);
var notifications = new List<bool>();
disposables.Add(activator.Subscribe(notifications.Add));
dependency.OnNext(false);
dependency.OnNext(false);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(true);
dependency.OnNext(false);
dependency.OnNext(false);
dependency.OnNext(false);
Assert.That(notifications.IsSameSequenceAs(false, true, false));
}
public void When_any_dependency_produces_false_then_deactivate_is_called()
{
var deactivations = 0;
var dependency1 = new BehaviorSubject <bool>(true);
var dependency2 = new BehaviorSubject <bool>(true);
var activator = new FeatureActivator(
activate: () => { },
deactivate: () => deactivations++,
dependsOn: new[] { dependency1, dependency2 });
var notifications = new List <bool>();
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(deactivations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(true));
dependency1.OnNext(false);
Assert.That(deactivations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(true, false));
}
public void Deactivate_is_not_called_until_after_activate_has_been_called()
{
var deactivations = 0;
var subject = new BehaviorSubject<bool>(false);
var activator = new FeatureActivator(() => { }, () => deactivations++, dependsOn: subject);
disposables.Add(activator.Subscribe(_ => { }));
subject.OnNext(true);
Assert.That(deactivations, Is.EqualTo(0));
subject.OnNext(false);
Assert.That(deactivations, Is.EqualTo(1));
}
public void When_any_dependency_produces_false_then_deactivate_is_called()
{
var deactivations = 0;
var dependency1 = new BehaviorSubject<bool>(true);
var dependency2 = new BehaviorSubject<bool>(true);
var activator = new FeatureActivator(
activate: () => { },
deactivate: () => deactivations++,
dependsOn: new[] { dependency1, dependency2 });
var notifications = new List<bool>();
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(deactivations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(true));
dependency1.OnNext(false);
Assert.That(deactivations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(true, false));
}
public void When_there_are_multiple_dependencies_they_must_all_return_true_before_Activate_is_called()
{
var activations = 0;
var dependency1 = new BehaviorSubject<bool>(false);
var dependency2 = new BehaviorSubject<bool>(false);
var activator = new FeatureActivator(
activate: () => activations++,
dependsOn: new[] { dependency1, dependency2 });
var notifications = new List<bool>();
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
dependency1.OnNext(true);
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
dependency2.OnNext(true);
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true));
}
public void Activate_is_not_called_until_dependencies_return_true()
{
var activations = 0;
var notifications = new List<bool>();
var subject = new BehaviorSubject<bool>(false);
var activator = new FeatureActivator(() => activations++, dependsOn: subject);
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
subject.OnNext(false);
Assert.That(activations, Is.EqualTo(0));
Assert.That(notifications.IsSameSequenceAs(false));
subject.OnNext(true);
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true));
disposables.Add(activator.Subscribe(notifications.Add));
Assert.That(activations, Is.EqualTo(1));
Assert.That(notifications.IsSameSequenceAs(false, true, true));
}
public void When_there_are_multiple_subscribers_then_activate_is_not_called_repeatedly()
{
var activations = 0;
var activator = new FeatureActivator(() => activations++);
disposables.Add(activator.Subscribe(_ => { }));
disposables.Add(activator.Subscribe(_ => { }));
disposables.Add(activator.Subscribe(_ => { }));
Assert.That(activations, Is.EqualTo(1));
}