public void ObservePropertyChangedEmptyClear()
{
var queue = new ObservableQueue <int>();
int count = 0;
queue.PropertyChanged += (o, e) => count++;
queue.Clear();
count
.Should().Be(0);
}
public void ObserveCollectionChanged()
{
var queue = new ObservableQueue <string>();
var args = new List <NotifyCollectionChangedEventArgs>();
queue.CollectionChanged += (o, e) => args.Add(e);
queue.Enqueue("A");
args
.Should().ContainSingle()
.Which
.Should().BeEquivalentTo(
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, "A", 0)
);
args.Clear();
queue.Enqueue("B");
args
.Should().ContainSingle()
.Which
.Should().BeEquivalentTo(
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, "B", 1)
);
args.Clear();
queue.Enqueue("C");
args
.Should().ContainSingle()
.Which
.Should().BeEquivalentTo(
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, "C", 2)
);
args.Clear();
queue.Dequeue();
args
.Should().ContainSingle()
.Which
.Should().BeEquivalentTo(
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, "A", 0)
);
args.Clear();
queue.Clear();
args
.Should().ContainSingle()
.Which
.Should().BeEquivalentTo(
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)
);
}
public void ObservePropertyChanged()
{
var queue = new ObservableQueue <int>();
var props = new List <string>();
var itemQuery = props.Where(p => p == "Item[]");
var countQuery = props.Where(p => p == "Count");
queue.PropertyChanged += (o, e) => props.Add(e.PropertyName);
queue.Enqueue(1);
itemQuery
.Should().HaveCount(1);
countQuery
.Should().HaveCount(1);
queue.Enqueue(2);
itemQuery
.Should().HaveCount(2);
countQuery
.Should().HaveCount(2);
queue.Enqueue(3);
itemQuery
.Should().HaveCount(3);
countQuery
.Should().HaveCount(3);
queue.Dequeue();
itemQuery
.Should().HaveCount(4);
countQuery
.Should().HaveCount(4);
queue.Clear();
itemQuery
.Should().HaveCount(5);
countQuery
.Should().HaveCount(5);
}
public void ShouldGrowAutomatically()
{
var target = new ObservableQueue<string>( 3 );
for ( var i = 0; i < 10; i++ )
target.Enqueue( ( i + 1 ).ToString() );
target.Clear();
target.TrimExcess();
}