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https://issues.apache.org/jira/browse/LUCENENET-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523697
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Neal Granroth commented on LUCENENET-97:
----------------------------------------
The problem description lists the specific failure.
However, to be very specific, here is an NUnit test case illustrating the
problem:
[Test]
public virtual void TestIterator2()
{
RAMDirectory directory = new RAMDirectory();
IndexWriter writer = new IndexWriter(directory, new
WhitespaceAnalyzer(), true);
Lucene.Net.Documents.Document doc = new
Lucene.Net.Documents.Document();
doc.Add(new Field("field", "iterator test doc 1",
Field.Store.YES, Field.Index.TOKENIZED));
writer.AddDocument(doc);
doc = new Lucene.Net.Documents.Document();
doc.Add(new Field("field", "iterator test doc 2",
Field.Store.YES, Field.Index.TOKENIZED));
writer.AddDocument(doc);
writer.Close();
IndexSearcher searcher = new IndexSearcher(directory);
Hits hits = searcher.Search(new TermQuery(new
Term("field", "iterator")));
// ..................
HitIterator iterator = (HitIterator) hits.Iterator();
Assert.AreEqual(2, iterator.Length());
// ..................
iterator.MoveNext(); // position to 1st hit
iterator.MoveNext(); // position to 2nd hit
Assert.AreEqual("iterator test doc 2",
((Hit)iterator.Current).GetDocument().Get("field"));
// ..................
HitIterator iterator2 = (HitIterator) hits.Iterator();
Hit hit = (Hit) iterator2.Current;
Assert.AreEqual("iterator test doc 1",
hit.Get("field"));
// Verify that "Current" does not move, when MoveNext
is not called.
Hit hitAgain = (Hit) iterator2.Current;
Assert.AreEqual("iterator test doc 1",
hitAgain.Get("field"));
}
> HitIterator does not correctly implement System.Collections.IEnumerator
> -----------------------------------------------------------------------
>
> Key: LUCENENET-97
> URL: https://issues.apache.org/jira/browse/LUCENENET-97
> Project: Lucene.Net
> Issue Type: Bug
> Environment: .NET
> Reporter: Neal Granroth
>
> method MoveNext() is supposed to increment the position within the list; it
> does not.
> method Current() is supposed to return the object at the current position,
> but not change the position within the list.
> It incorrectly moves to the next position.
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