public void MoveNextAfterDispose(IEnumerable<int> source)
{
// Select is specialized for a bunch of different types, so we want
// to make sure this holds true for all of them.
var identityTransforms = new List<Func<IEnumerable<int>, IEnumerable<int>>>
{
e => e,
e => ForceNotCollection(e),
e => e.ToArray(),
e => e.ToList(),
e => new LinkedList<int>(e), // IList<T> that's not a List
e => e.Select(i => i) // Multiple Select() chains are optimized
};
foreach (IEnumerable<int> equivalentSource in identityTransforms.Select(t => t(source)))
{
IEnumerable<int> result = equivalentSource.Select(i => i);
using (IEnumerator<int> e = result.GetEnumerator())
{
while (e.MoveNext()) ; // Loop until we reach the end of the iterator, @ which pt it gets disposed.
Assert.False(e.MoveNext()); // MoveNext should not throw an exception after Dispose.
}
}
}
