public async Task CollectionChangedHandlerInvokedForConjAsync()
{
var loader = new AsyncLoader <int>(Seq.ListBased, eventContext: new RunInlineSynchronizationContext());
var listener = Substitute.For <CollectionChangedHandler <int> >();
loader.CollectionChanged += listener;
await loader.ConjAsync(1, CancellationToken.None); // --- Perform ---
listener.Received().Invoke(loader, Fluent.Match <IntChangesAlias>(changes =>
changes.Should().ContainSingle().Which.ShouldBeEquivalentTo(new ItemChange <int>(ChangeType.Added, 1))));
}