public void WatchedCyclicDependency()
{
Atom <int> a, b = null;
a = Atom.Computed(Lifetime, () => b.Value, debugName: "A");
b = Atom.Computed(Lifetime, () => a.Value, debugName: "B");
Exception exception = null;
var reaction = Atom.Reaction(Lifetime, () =>
{
a.Get();
b.Get();
}, ex => exception = ex, debugName: "Reaction");
AtomAssert.That(a).SubscribersCountAreEqualTo(1);
AtomAssert.That(b).SubscribersCountAreEqualTo(1);
AtomAssert.That(a).IsSubscribedTo(b);
AtomAssert.That(reaction).IsSubscribedTo(a);
Assert.Throws <CyclicAtomDependencyException>(() => a.Get());
Assert.Throws <CyclicAtomDependencyException>(() => b.Get());
Assert.IsTrue(exception is CyclicAtomDependencyException);
}
public void ActivationOnTrackedRead()
{
var target = Atom.Computed(Lifetime, () => 1);
Atom.Reaction(Lifetime, () => target.Get());
AtomAssert.That(target).IsActive();
}
public void AtomActivatedOnRead(string type)
{
var atom = type == "Value" ? Atom.Value(Lifetime, 1) : Atom.Computed(Lifetime, () => 1);
atom.Get();
AtomAssert.That(atom).IsActive();
}
public void KeepActiveOnUnsubscribe()
{
var target = Atom.Computed(Lifetime, () => 1);
using (var nested = Lifetime.CreateNested())
{
Atom.Reaction(nested.Lifetime, () => target.Get());
}
AtomAssert.That(target).SubscribersCountAreEqualTo(0);
AtomAssert.That(target).IsActive();
}
public void DeactivationOnLifetimeDispose()
{
Atom <int> target;
using (var nested = Lifetime.CreateNested())
{
target = Atom.Computed(nested.Lifetime, () => 1);
target.Get();
}
AtomAssert.That(target).IsNotActive();
}
public void UnwatchedCyclicDependency()
{
Atom <int> a, b = null;
a = Atom.Computed(Lifetime, () => b.Value);
b = Atom.Computed(Lifetime, () => a.Value);
AtomAssert.That(a).SubscribersCountAreEqualTo(0);
AtomAssert.That(b).SubscribersCountAreEqualTo(0);
Assert.Throws <CyclicAtomDependencyException>(() => a.Get());
Assert.Throws <CyclicAtomDependencyException>(() => b.Get());
}
public void UnwatchedPullOfObsoleteActiveAtom()
{
var source = Atom.Value(Lifetime, 0);
var computed = Atom.Computed(Lifetime, () => source.Value + 1);
var reaction = Atom.Reaction(Lifetime, () => computed.Get());
AtomAssert.That(computed).IsActive();
AtomAssert.That(computed).ChildrenCountAreEqualTo(1);
using (Atom.NoWatch)
{
// make source obsolete
source.Value = 1;
// pull new value in unwatched scope
// dependencies must persist
Assert.AreEqual(2, computed.Value);
}
AtomAssert.That(computed).ChildrenCountAreEqualTo(1);
reaction.Deactivate();
}
public void InactiveByDefault()
{
var target = Atom.Computed(Lifetime, () => 1);
AtomAssert.That(target).IsNotActive();
}