public void DynamicAnonCollection()
{
var n = 0;
var t2 = new AnonymousReadOnlyCollection<int>(() => n, () => n.CRange().Select(i => i + 10).GetEnumerator());
t2.Count.AssertEquals(0);
t2.AssertSequenceEquals(new int[0]);
n = 1;
t2.Count.AssertEquals(1);
t2.AssertSequenceEquals(new[] { 10 });
}
public void DynamicAnonCollection()
{
var n = 0;
var t2 = new AnonymousReadOnlyCollection <int>(() => n, () => n.CRange().Select(i => i + 10).GetEnumerator());
t2.Count.AssertEquals(0);
t2.AssertSequenceEquals(new int[0]);
n = 1;
t2.Count.AssertEquals(1);
t2.AssertSequenceEquals(new[] { 10 });
}
public void AnonCollectionEfficientIterator()
{
var li = new List<int> {0};
var ri1 = new AnonymousReadOnlyCollection<int>(() => li.Count, () => li.ToArray().AsEnumerable().GetEnumerator());
var ri2 = new AnonymousReadOnlyCollection<int>(() => li.Count, ((IEnumerable<int>)li).GetEnumerator);
using (var e1 = ri1.GetEnumerator()) {
using (var e2 = ri2.GetEnumerator()) {
e1.MoveNext().AssertIsTrue();
e2.MoveNext().AssertIsTrue();
li.Add(1);
TestUtil.AssertThrows<InvalidOperationException>(() => e2.MoveNext()); // collection modified during iteration
e1.MoveNext(); // not using collection iterator
}
}
}
public void AnonCollectionEfficientIterator()
{
var li = new List <int> {
0
};
var ri1 = new AnonymousReadOnlyCollection <int>(() => li.Count, () => li.ToArray().AsEnumerable().GetEnumerator());
var ri2 = new AnonymousReadOnlyCollection <int>(() => li.Count, ((IEnumerable <int>)li).GetEnumerator);
using (var e1 = ri1.GetEnumerator()) {
using (var e2 = ri2.GetEnumerator()) {
e1.MoveNext().AssertIsTrue();
e2.MoveNext().AssertIsTrue();
li.Add(1);
TestUtil.AssertThrows <InvalidOperationException>(() => e2.MoveNext()); // collection modified during iteration
e1.MoveNext(); // not using collection iterator
}
}
}
