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From synhers...@apache.org
Subject [14/17] lucenenet git commit: Lucene.Net.Join tests now passing
Date Sun, 23 Aug 2015 22:34:13 GMT
http://git-wip-us.apache.org/repos/asf/lucenenet/blob/4820f236/Lucene.Net.Tests.Join/Properties/AssemblyInfo.cs
----------------------------------------------------------------------
diff --git a/Lucene.Net.Tests.Join/Properties/AssemblyInfo.cs b/Lucene.Net.Tests.Join/Properties/AssemblyInfo.cs
deleted file mode 100644
index f94805a..0000000
--- a/Lucene.Net.Tests.Join/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,36 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("Lucene.Net.Tests.Join")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("Lucene.Net.Tests.Join")]
-[assembly: AssemblyCopyright("Copyright ©  2015")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("4c1b794f-8158-45e6-85b3-2c46569bebc2")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/4820f236/Lucene.Net.Tests.Join/TestBlockJoin.cs
----------------------------------------------------------------------
diff --git a/Lucene.Net.Tests.Join/TestBlockJoin.cs b/Lucene.Net.Tests.Join/TestBlockJoin.cs
deleted file mode 100644
index 7c6861f..0000000
--- a/Lucene.Net.Tests.Join/TestBlockJoin.cs
+++ /dev/null
@@ -1,1599 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using Lucene.Net.Analysis;
-using Lucene.Net.Documents;
-using Lucene.Net.Grouping;
-using Lucene.Net.Index;
-using Lucene.Net.Join;
-using Lucene.Net.Randomized;
-using Lucene.Net.Randomized.Generators;
-using Lucene.Net.Search;
-using Lucene.Net.Store;
-using Lucene.Net.Support;
-using Lucene.Net.Util;
-using NUnit.Framework;
-
-namespace Lucene.Net.Tests.Join
-{
-    /*
-	 * Licensed to the Apache Software Foundation (ASF) under one or more
-	 * contributor license agreements.  See the NOTICE file distributed with
-	 * this work for additional information regarding copyright ownership.
-	 * The ASF licenses this file to You under the Apache License, Version 2.0
-	 * (the "License"); you may not use this file except in compliance with
-	 * the License.  You may obtain a copy of the License at
-	 *
-	 *     http://www.apache.org/licenses/LICENSE-2.0
-	 *
-	 * Unless required by applicable law or agreed to in writing, software
-	 * distributed under the License is distributed on an "AS IS" BASIS,
-	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-	 * See the License for the specific language governing permissions and
-	 * limitations under the License.
-	 */
-
-    public class TestBlockJoin : LuceneTestCase
-    {
-        // One resume...
-        private Document MakeResume(string name, string country)
-        {
-            Document resume = new Document();
-            resume.Add(NewStringField("docType", "resume", Field.Store.NO));
-            resume.Add(NewStringField("name", name, Field.Store.YES));
-            resume.Add(NewStringField("country", country, Field.Store.NO));
-            return resume;
-        }
-
-        // ... has multiple jobs
-        private Document MakeJob(string skill, int year)
-        {
-            Document job = new Document();
-            job.Add(NewStringField("skill", skill, Field.Store.YES));
-            job.Add(new IntField("year", year, Field.Store.NO));
-            job.Add(new StoredField("year", year));
-            return job;
-        }
-
-        // ... has multiple qualifications
-        private Document MakeQualification(string qualification, int year)
-        {
-            Document job = new Document();
-            job.Add(NewStringField("qualification", qualification, Field.Store.YES));
-            job.Add(new IntField("year", year, Field.Store.NO));
-            return job;
-        }
-
-        [Test]
-        public void TestEmptyChildFilter()
-        {
-            Directory dir = NewDirectory();
-            IndexWriterConfig config = new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random()));
-            config.SetMergePolicy(NoMergePolicy.NO_COMPOUND_FILES);
-            // we don't want to merge - since we rely on certain segment setup
-            IndexWriter w = new IndexWriter(dir, config);
-
-            IList<Document> docs = new List<Document>();
-
-            docs.Add(MakeJob("java", 2007));
-            docs.Add(MakeJob("python", 2010));
-            docs.Add(MakeResume("Lisa", "United Kingdom"));
-            w.AddDocuments(docs);
-
-            docs.Clear();
-            docs.Add(MakeJob("ruby", 2005));
-            docs.Add(MakeJob("java", 2006));
-            docs.Add(MakeResume("Frank", "United States"));
-            w.AddDocuments(docs);
-            w.Commit();
-            int num = AtLeast(10); // produce a segment that doesn't have a value in the docType field
-            for (int i = 0; i < num; i++)
-            {
-                docs.Clear();
-                docs.Add(MakeJob("java", 2007));
-                w.AddDocuments(docs);
-            }
-
-            IndexReader r = DirectoryReader.Open(w, Random().NextBoolean());
-            w.Dispose();
-            assertTrue(r.Leaves.size() > 1);
-            IndexSearcher s = new IndexSearcher(r);
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            BooleanQuery childQuery = new BooleanQuery();
-            childQuery.Add(new BooleanClause(new TermQuery(new Term("skill", "java")), BooleanClause.Occur.MUST));
-            childQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 2006, 2011, true, true), BooleanClause.Occur.MUST));
-
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-
-            BooleanQuery fullQuery = new BooleanQuery();
-            fullQuery.Add(new BooleanClause(childJoinQuery, BooleanClause.Occur.MUST));
-            fullQuery.Add(new BooleanClause(new MatchAllDocsQuery(), BooleanClause.Occur.MUST));
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(Sort.RELEVANCE, 1, true, true);
-            s.Search(fullQuery, c);
-            TopGroups<int> results = c.GetTopGroups(childJoinQuery, null, 0, 10, 0, true);
-            assertFalse(float.IsNaN(results.MaxScore));
-            assertEquals(1, results.TotalGroupedHitCount);
-            assertEquals(1, results.Groups.Length);
-            GroupDocs<int> group = results.Groups[0];
-            Document childDoc = s.Doc(group.ScoreDocs[0].Doc);
-            assertEquals("java", childDoc.Get("skill"));
-            assertNotNull(group.GroupValue);
-            Document parentDoc = s.Doc(group.GroupValue);
-            assertEquals("Lisa", parentDoc.Get("name"));
-
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestSimple()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            IList<Document> docs = new List<Document>();
-
-            docs.Add(MakeJob("java", 2007));
-            docs.Add(MakeJob("python", 2010));
-            docs.Add(MakeResume("Lisa", "United Kingdom"));
-            w.AddDocuments(docs);
-
-            docs.Clear();
-            docs.Add(MakeJob("ruby", 2005));
-            docs.Add(MakeJob("java", 2006));
-            docs.Add(MakeResume("Frank", "United States"));
-            w.AddDocuments(docs);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            // Create a filter that defines "parent" documents in the index - in this case resumes
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            // Define child document criteria (finds an example of relevant work experience)
-            BooleanQuery childQuery = new BooleanQuery();
-            childQuery.Add(new BooleanClause(new TermQuery(new Term("skill", "java")), BooleanClause.Occur.MUST));
-            childQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 2006, 2011, true, true), BooleanClause.Occur.MUST));
-
-            // Define parent document criteria (find a resident in the UK)
-            Query parentQuery = new TermQuery(new Term("country", "United Kingdom"));
-
-            // Wrap the child document query to 'join' any matches
-            // up to corresponding parent:
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-
-            // Combine the parent and nested child queries into a single query for a candidate
-            BooleanQuery fullQuery = new BooleanQuery();
-            fullQuery.Add(new BooleanClause(parentQuery, BooleanClause.Occur.MUST));
-            fullQuery.Add(new BooleanClause(childJoinQuery, BooleanClause.Occur.MUST));
-
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(Sort.RELEVANCE, 1, true, true);
-
-            s.Search(fullQuery, c);
-
-            TopGroups<int> results = c.GetTopGroups(childJoinQuery, null, 0, 10, 0, true);
-            assertFalse(float.IsNaN(results.MaxScore));
-
-            //assertEquals(1, results.totalHitCount);
-            assertEquals(1, results.TotalGroupedHitCount);
-            assertEquals(1, results.Groups.Length);
-
-            GroupDocs<int> group = results.Groups[0];
-            assertEquals(1, group.TotalHits);
-            assertFalse(float.IsNaN(group.Score));
-
-            Document childDoc = s.Doc(group.ScoreDocs[0].Doc);
-            //System.out.println("  doc=" + group.ScoreDocs[0].Doc);
-            assertEquals("java", childDoc.Get("skill"));
-            assertNotNull(group.GroupValue);
-            Document parentDoc = s.Doc(group.GroupValue);
-            assertEquals("Lisa", parentDoc.Get("name"));
-
-
-            //System.out.println("TEST: now test up");
-
-            // Now join "up" (map parent hits to child docs) instead...:
-            ToChildBlockJoinQuery parentJoinQuery = new ToChildBlockJoinQuery(parentQuery, parentsFilter, Random().NextBoolean());
-            BooleanQuery fullChildQuery = new BooleanQuery();
-            fullChildQuery.Add(new BooleanClause(parentJoinQuery, BooleanClause.Occur.MUST));
-            fullChildQuery.Add(new BooleanClause(childQuery, BooleanClause.Occur.MUST));
-
-            //System.out.println("FULL: " + fullChildQuery);
-            TopDocs hits = s.Search(fullChildQuery, 10);
-            assertEquals(1, hits.TotalHits);
-            childDoc = s.Doc(hits.ScoreDocs[0].Doc);
-            //System.out.println("CHILD = " + childDoc + " docID=" + hits.ScoreDocs[0].Doc);
-            assertEquals("java", childDoc.Get("skill"));
-            assertEquals(2007, childDoc.GetField("year").NumericValue);
-            assertEquals("Lisa", GetParentDoc(r, parentsFilter, hits.ScoreDocs[0].Doc).Get("name"));
-
-            // Test with filter on child docs:
-            assertEquals(0, s.Search(fullChildQuery, new QueryWrapperFilter(new TermQuery(new Term("skill", "foosball"))), 1).TotalHits);
-
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestBugCausedByRewritingTwice()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            IList<Document> docs = new List<Document>();
-
-            for (int i = 0; i < 10; i++)
-            {
-                docs.Clear();
-                docs.Add(MakeJob("ruby", i));
-                docs.Add(MakeJob("java", 2007));
-                docs.Add(MakeResume("Frank", "United States"));
-                w.AddDocuments(docs);
-            }
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            MultiTermQuery qc = NumericRangeQuery.NewIntRange("year", 2007, 2007, true, true);
-            // Hacky: this causes the query to need 2 rewrite
-            // iterations: 
-            qc.SetRewriteMethod(MultiTermQuery.CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE);
-
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            int h1 = qc.GetHashCode();
-            Query qw1 = qc.Rewrite(r);
-            int h2 = qw1.GetHashCode();
-            Query qw2 = qw1.Rewrite(r);
-            int h3 = qw2.GetHashCode();
-
-            assertTrue(h1 != h2);
-            assertTrue(h2 != h3);
-            assertTrue(h3 != h1);
-
-            ToParentBlockJoinQuery qp = new ToParentBlockJoinQuery(qc, parentsFilter, ScoreMode.Max);
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(Sort.RELEVANCE, 10, true, true);
-
-            s.Search(qp, c);
-            TopGroups<int> groups = c.GetTopGroups(qp, Sort.INDEXORDER, 0, 10, 0, true);
-            foreach (GroupDocs<int> group in groups.Groups)
-            {
-                assertEquals(1, group.TotalHits);
-            }
-
-            r.Dispose();
-            dir.Dispose();
-        }
-        
-        protected QueryWrapperFilter Skill(string skill)
-        {
-            return new QueryWrapperFilter(new TermQuery(new Term("skill", skill)));
-        }
-
-        [Test]
-        public virtual void TestSimpleFilter()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            IList<Document> docs = new List<Document>();
-            docs.Add(MakeJob("java", 2007));
-            docs.Add(MakeJob("python", 2010));
-            CollectionsHelper.Shuffle(docs);
-            docs.Add(MakeResume("Lisa", "United Kingdom"));
-
-            IList<Document> docs2 = new List<Document>();
-            docs2.Add(MakeJob("ruby", 2005));
-            docs2.Add(MakeJob("java", 2006));
-            CollectionsHelper.Shuffle(docs2);
-            docs2.Add(MakeResume("Frank", "United States"));
-
-            AddSkillless(w);
-            bool turn = Random().NextBoolean();
-            w.AddDocuments(turn ? docs : docs2);
-
-            AddSkillless(w);
-
-            w.AddDocuments(!turn ? docs : docs2);
-
-            AddSkillless(w);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            // Create a filter that defines "parent" documents in the index - in this case resumes
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            // Define child document criteria (finds an example of relevant work experience)
-            BooleanQuery childQuery = new BooleanQuery();
-            childQuery.Add(new BooleanClause(new TermQuery(new Term("skill", "java")), BooleanClause.Occur.MUST));
-            childQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 2006, 2011, true, true), BooleanClause.Occur.MUST));
-
-            // Define parent document criteria (find a resident in the UK)
-            Query parentQuery = new TermQuery(new Term("country", "United Kingdom"));
-
-            // Wrap the child document query to 'join' any matches
-            // up to corresponding parent:
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-
-            assertEquals("no filter - both passed", 2, s.Search(childJoinQuery, 10).TotalHits);
-
-            assertEquals("dummy filter passes everyone ", 2, s.Search(childJoinQuery, parentsFilter, 10).TotalHits);
-            assertEquals("dummy filter passes everyone ", 2, s.Search(childJoinQuery, new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))), 10).TotalHits);
-
-            // not found test
-            assertEquals("noone live there", 0, s.Search(childJoinQuery, new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("country", "Oz")))), 1).TotalHits);
-            assertEquals("noone live there", 0, s.Search(childJoinQuery, new QueryWrapperFilter(new TermQuery(new Term("country", "Oz"))), 1).TotalHits);
-
-            // apply the UK filter by the searcher
-            TopDocs ukOnly = s.Search(childJoinQuery, new QueryWrapperFilter(parentQuery), 1);
-            assertEquals("has filter - single passed", 1, ukOnly.TotalHits);
-            assertEquals("Lisa", r.Document(ukOnly.ScoreDocs[0].Doc).Get("name"));
-
-            // looking for US candidates
-            TopDocs usThen = s.Search(childJoinQuery, new QueryWrapperFilter(new TermQuery(new Term("country", "United States"))), 1);
-            assertEquals("has filter - single passed", 1, usThen.TotalHits);
-            assertEquals("Frank", r.Document(usThen.ScoreDocs[0].Doc).Get("name"));
-
-
-            TermQuery us = new TermQuery(new Term("country", "United States"));
-            assertEquals("@ US we have java and ruby", 2, s.Search(new ToChildBlockJoinQuery(us, parentsFilter, Random().NextBoolean()), 10).TotalHits);
-
-            assertEquals("java skills in US", 1, s.Search(new ToChildBlockJoinQuery(us, parentsFilter, Random().NextBoolean()), Skill("java"), 10).TotalHits);
-
-            BooleanQuery rubyPython = new BooleanQuery();
-            rubyPython.Add(new TermQuery(new Term("skill", "ruby")), BooleanClause.Occur.SHOULD);
-            rubyPython.Add(new TermQuery(new Term("skill", "python")), BooleanClause.Occur.SHOULD);
-            assertEquals("ruby skills in US", 1, s.Search(new ToChildBlockJoinQuery(us, parentsFilter, Random().NextBoolean()), new QueryWrapperFilter(rubyPython), 10).TotalHits);
-
-            r.Dispose();
-            dir.Dispose();
-        }
-        
-        private void AddSkillless(RandomIndexWriter w)
-        {
-            if (Random().NextBoolean())
-            {
-                w.AddDocument(MakeResume("Skillless", Random().NextBoolean() ? "United Kingdom" : "United States"));
-            }
-        }
-        
-        private Document GetParentDoc(IndexReader reader, Filter parents, int childDocID)
-        {
-            IList<AtomicReaderContext> leaves = reader.Leaves;
-            int subIndex = ReaderUtil.SubIndex(childDocID, leaves);
-            AtomicReaderContext leaf = leaves[subIndex];
-            FixedBitSet bits = (FixedBitSet)parents.GetDocIdSet(leaf, null);
-            return leaf.AtomicReader.Document(bits.NextSetBit(childDocID - leaf.DocBase));
-        }
-
-        [Test]
-        public void TestBoostBug()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            ToParentBlockJoinQuery q = new ToParentBlockJoinQuery(new MatchAllDocsQuery(), new QueryWrapperFilter(new MatchAllDocsQuery()), ScoreMode.Avg);
-            QueryUtils.Check(Random(), q, s);
-            s.Search(q, 10);
-            BooleanQuery bq = new BooleanQuery();
-            bq.Boost = 2f; // we boost the BQ
-            bq.Add(q, BooleanClause.Occur.MUST);
-            s.Search(bq, 10);
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestNestedDocScoringWithDeletes()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())).SetMergePolicy(NoMergePolicy.COMPOUND_FILES));
-
-            // Cannot assert this since we use NoMergePolicy:
-            w.DoRandomForceMergeAssert = false;
-
-            IList<Document> docs = new List<Document>();
-            docs.Add(MakeJob("java", 2007));
-            docs.Add(MakeJob("python", 2010));
-            docs.Add(MakeResume("Lisa", "United Kingdom"));
-            w.AddDocuments(docs);
-
-            docs.Clear();
-            docs.Add(MakeJob("c", 1999));
-            docs.Add(MakeJob("ruby", 2005));
-            docs.Add(MakeJob("java", 2006));
-            docs.Add(MakeResume("Frank", "United States"));
-            w.AddDocuments(docs);
-
-            w.Commit();
-            IndexSearcher s = NewSearcher(DirectoryReader.Open(dir));
-
-            ToParentBlockJoinQuery q = new ToParentBlockJoinQuery(NumericRangeQuery.NewIntRange("year", 1990, 2010, true, true), new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume")))), ScoreMode.Total);
-
-            TopDocs topDocs = s.Search(q, 10);
-            assertEquals(2, topDocs.TotalHits);
-            assertEquals(6, topDocs.ScoreDocs[0].Doc);
-            assertEquals(3.0f, topDocs.ScoreDocs[0].Score, 0.0f);
-            assertEquals(2, topDocs.ScoreDocs[1].Doc);
-            assertEquals(2.0f, topDocs.ScoreDocs[1].Score, 0.0f);
-
-            s.IndexReader.Dispose();
-            w.DeleteDocuments(new Term("skill", "java"));
-            w.Dispose();
-            s = NewSearcher(DirectoryReader.Open(dir));
-
-            topDocs = s.Search(q, 10);
-            assertEquals(2, topDocs.TotalHits);
-            assertEquals(6, topDocs.ScoreDocs[0].Doc);
-            assertEquals(2.0f, topDocs.ScoreDocs[0].Score, 0.0f);
-            assertEquals(2, topDocs.ScoreDocs[1].Doc);
-            assertEquals(1.0f, topDocs.ScoreDocs[1].Score, 0.0f);
-
-            s.IndexReader.Dispose();
-            dir.Dispose();
-        }
-
-        private string[][] GetRandomFields(int maxUniqueValues)
-        {
-
-            string[][] fields = new string[TestUtil.NextInt(Random(), 2, 4)][];
-            for (int fieldID = 0; fieldID < fields.Length; fieldID++)
-            {
-                int valueCount;
-                if (fieldID == 0)
-                {
-                    valueCount = 2;
-                }
-                else
-                {
-                    valueCount = TestUtil.NextInt(Random(), 1, maxUniqueValues);
-                }
-
-                string[] values = fields[fieldID] = new string[valueCount];
-                for (int i = 0; i < valueCount; i++)
-                {
-                    values[i] = TestUtil.RandomRealisticUnicodeString(Random());
-                    //values[i] = TestUtil.randomSimpleString(random);
-                }
-            }
-
-            return fields;
-        }
-
-        private Term RandomParentTerm(string[] values)
-        {
-            return new Term("parent0", values[Random().Next(values.Length)]);
-        }
-
-        private Term RandomChildTerm(string[] values)
-        {
-            return new Term("child0", values[Random().Next(values.Length)]);
-        }
-
-        private Sort GetRandomSort(string prefix, int numFields)
-        {
-            IList<SortField> sortFields = new List<SortField>();
-            // TODO: sometimes sort by score; problem is scores are
-            // not comparable across the two indices
-            // sortFields.Add(SortField.FIELD_SCORE);
-            if (Random().NextBoolean())
-            {
-                sortFields.Add(new SortField(prefix + Random().Next(numFields), SortField.Type_e.STRING, Random().NextBoolean()));
-            }
-            else if (Random().NextBoolean())
-            {
-                sortFields.Add(new SortField(prefix + Random().Next(numFields), SortField.Type_e.STRING, Random().NextBoolean()));
-                sortFields.Add(new SortField(prefix + Random().Next(numFields), SortField.Type_e.STRING, Random().NextBoolean()));
-            }
-            // Break ties:
-            sortFields.Add(new SortField(prefix + "ID", SortField.Type_e.INT));
-            return new Sort(sortFields.ToArray());
-        }
-
-        [Test]
-        public void TestRandom()
-        {
-            // We build two indices at once: one normalized (which
-            // ToParentBlockJoinQuery/Collector,
-            // ToChildBlockJoinQuery can query) and the other w/
-            // the same docs, just fully denormalized:
-            Directory dir = NewDirectory();
-            Directory joinDir = NewDirectory();
-
-            int numParentDocs = TestUtil.NextInt(Random(), 100 * RANDOM_MULTIPLIER, 300 * RANDOM_MULTIPLIER);
-            //final int numParentDocs = 30;
-
-            // Values for parent fields:
-            string[][] parentFields = GetRandomFields(numParentDocs / 2);
-            // Values for child fields:
-            string[][] childFields = GetRandomFields(numParentDocs);
-
-            bool doDeletes = Random().NextBoolean();
-            IList<int> toDelete = new List<int>();
-
-            // TODO: parallel star join, nested join cases too!
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-            RandomIndexWriter joinW = new RandomIndexWriter(Random(), joinDir);
-            for (int parentDocID = 0; parentDocID < numParentDocs; parentDocID++)
-            {
-                Document parentDoc = new Document();
-                Document parentJoinDoc = new Document();
-                Field id = NewStringField("parentID", "" + parentDocID, Field.Store.YES);
-                parentDoc.Add(id);
-                parentJoinDoc.Add(id);
-                parentJoinDoc.Add(NewStringField("isParent", "x", Field.Store.NO));
-                for (int field = 0; field < parentFields.Length; field++)
-                {
-                    if (Random().NextDouble() < 0.9)
-                    {
-                        Field f = NewStringField("parent" + field, parentFields[field][Random().Next(parentFields[field].Length)], Field.Store.NO);
-                        parentDoc.Add(f);
-                        parentJoinDoc.Add(f);
-                    }
-                }
-
-                if (doDeletes)
-                {
-                    parentDoc.Add(NewStringField("blockID", "" + parentDocID, Field.Store.NO));
-                    parentJoinDoc.Add(NewStringField("blockID", "" + parentDocID, Field.Store.NO));
-                }
-
-                IList<Document> joinDocs = new List<Document>();
-
-                if (VERBOSE)
-                {
-                    StringBuilder sb = new StringBuilder();
-                    sb.Append("parentID=").Append(parentDoc.Get("parentID"));
-                    for (int fieldID = 0; fieldID < parentFields.Length; fieldID++)
-                    {
-                        string parent = parentDoc.Get("parent" + fieldID);
-                        if (parent != null)
-                        {
-                            sb.Append(" parent" + fieldID + "=" + parent);
-                        }
-                    }
-                    Console.WriteLine("  " + sb);
-                }
-
-                int numChildDocs = TestUtil.NextInt(Random(), 1, 20);
-                for (int childDocID = 0; childDocID < numChildDocs; childDocID++)
-                {
-                    // Denormalize: copy all parent fields into child doc:
-                    Document childDoc = TestUtil.CloneDocument(parentDoc);
-                    Document joinChildDoc = new Document();
-                    joinDocs.Add(joinChildDoc);
-
-                    Field childID = NewStringField("childID", "" + childDocID, Field.Store.YES);
-                    childDoc.Add(childID);
-                    joinChildDoc.Add(childID);
-
-                    for (int childFieldID = 0; childFieldID < childFields.Length; childFieldID++)
-                    {
-                        if (Random().NextDouble() < 0.9)
-                        {
-                            Field f = NewStringField("child" + childFieldID, childFields[childFieldID][Random().Next(childFields[childFieldID].Length)], Field.Store.NO);
-                            childDoc.Add(f);
-                            joinChildDoc.Add(f);
-                        }
-                    }
-
-                    if (VERBOSE)
-                    {
-                        StringBuilder sb = new StringBuilder();
-                        sb.Append("childID=").Append(joinChildDoc.Get("childID"));
-                        for (int fieldID = 0; fieldID < childFields.Length; fieldID++)
-                        {
-                            string child = joinChildDoc.Get("child" + fieldID);
-                            if (child != null)
-                            {
-                                sb.Append(" child" + fieldID + "=" + child);
-                            }
-                        }
-                        Console.WriteLine("    " + sb);
-                    }
-
-                    if (doDeletes)
-                    {
-                        joinChildDoc.Add(NewStringField("blockID", "" + parentDocID, Field.Store.NO));
-                    }
-
-                    w.AddDocument(childDoc);
-                }
-
-                // Parent last:
-                joinDocs.Add(parentJoinDoc);
-                joinW.AddDocuments(joinDocs);
-
-                if (doDeletes && Random().Next(30) == 7)
-                {
-                    toDelete.Add(parentDocID);
-                }
-            }
-
-            foreach (int deleteID in toDelete)
-            {
-                if (VERBOSE)
-                {
-                    Console.WriteLine("DELETE parentID=" + deleteID);
-                }
-                w.DeleteDocuments(new Term("blockID", "" + deleteID));
-                joinW.DeleteDocuments(new Term("blockID", "" + deleteID));
-            }
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexReader joinR = joinW.Reader;
-            joinW.Dispose();
-
-            if (VERBOSE)
-            {
-                Console.WriteLine("TEST: reader=" + r);
-                Console.WriteLine("TEST: joinReader=" + joinR);
-
-                for (int docIDX = 0; docIDX < joinR.MaxDoc; docIDX++)
-                {
-                    Console.WriteLine("  docID=" + docIDX + " doc=" + joinR.Document(docIDX));
-                }
-            }
-
-            IndexSearcher s = NewSearcher(r);
-
-            IndexSearcher joinS = new IndexSearcher(joinR);
-
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isParent", "x"))));
-
-            int iters = 200 * RANDOM_MULTIPLIER;
-
-            for (int iter = 0; iter < iters; iter++)
-            {
-                if (VERBOSE)
-                {
-                    Console.WriteLine("TEST: iter=" + (1 + iter) + " of " + iters);
-                }
-
-                Query childQuery;
-                if (Random().Next(3) == 2)
-                {
-                    int childFieldID = Random().Next(childFields.Length);
-                    childQuery = new TermQuery(new Term("child" + childFieldID, childFields[childFieldID][Random().Next(childFields[childFieldID].Length)]));
-                }
-                else if (Random().Next(3) == 2)
-                {
-                    BooleanQuery bq = new BooleanQuery();
-                    childQuery = bq;
-                    int numClauses = TestUtil.NextInt(Random(), 2, 4);
-                    bool didMust = false;
-                    for (int clauseIDX = 0; clauseIDX < numClauses; clauseIDX++)
-                    {
-                        Query clause;
-                        BooleanClause.Occur occur;
-                        if (!didMust && Random().NextBoolean())
-                        {
-                            occur = Random().NextBoolean() ? BooleanClause.Occur.MUST : BooleanClause.Occur.MUST_NOT;
-                            clause = new TermQuery(RandomChildTerm(childFields[0]));
-                            didMust = true;
-                        }
-                        else
-                        {
-                            occur = BooleanClause.Occur.SHOULD;
-                            int childFieldID = TestUtil.NextInt(Random(), 1, childFields.Length - 1);
-                            clause = new TermQuery(new Term("child" + childFieldID, childFields[childFieldID][Random().Next(childFields[childFieldID].Length)]));
-                        }
-                        bq.Add(clause, occur);
-                    }
-                }
-                else
-                {
-                    BooleanQuery bq = new BooleanQuery();
-                    childQuery = bq;
-
-                    bq.Add(new TermQuery(RandomChildTerm(childFields[0])), BooleanClause.Occur.MUST);
-                    int childFieldID = TestUtil.NextInt(Random(), 1, childFields.Length - 1);
-                    bq.Add(new TermQuery(new Term("child" + childFieldID, childFields[childFieldID][Random().Next(childFields[childFieldID].Length)])), Random().NextBoolean() ? BooleanClause.Occur.MUST : BooleanClause.Occur.MUST_NOT);
-                }
-
-                int x = Random().Next(4);
-                ScoreMode agg;
-                if (x == 0)
-                {
-                    agg = ScoreMode.None;
-                }
-                else if (x == 1)
-                {
-                    agg = ScoreMode.Max;
-                }
-                else if (x == 2)
-                {
-                    agg = ScoreMode.Total;
-                }
-                else
-                {
-                    agg = ScoreMode.Avg;
-                }
-
-                ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, agg);
-
-                // To run against the block-join index:
-                Query parentJoinQuery;
-
-                // Same query as parentJoinQuery, but to run against
-                // the fully denormalized index (so we can compare
-                // results):
-                Query parentQuery;
-
-                if (Random().NextBoolean())
-                {
-                    parentQuery = childQuery;
-                    parentJoinQuery = childJoinQuery;
-                }
-                else
-                {
-                    // AND parent field w/ child field
-                    BooleanQuery bq = new BooleanQuery();
-                    parentJoinQuery = bq;
-                    Term parentTerm = RandomParentTerm(parentFields[0]);
-                    if (Random().NextBoolean())
-                    {
-                        bq.Add(childJoinQuery, BooleanClause.Occur.MUST);
-                        bq.Add(new TermQuery(parentTerm), BooleanClause.Occur.MUST);
-                    }
-                    else
-                    {
-                        bq.Add(new TermQuery(parentTerm), BooleanClause.Occur.MUST);
-                        bq.Add(childJoinQuery, BooleanClause.Occur.MUST);
-                    }
-
-                    BooleanQuery bq2 = new BooleanQuery();
-                    parentQuery = bq2;
-                    if (Random().NextBoolean())
-                    {
-                        bq2.Add(childQuery, BooleanClause.Occur.MUST);
-                        bq2.Add(new TermQuery(parentTerm), BooleanClause.Occur.MUST);
-                    }
-                    else
-                    {
-                        bq2.Add(new TermQuery(parentTerm), BooleanClause.Occur.MUST);
-                        bq2.Add(childQuery, BooleanClause.Occur.MUST);
-                    }
-                }
-
-                Sort parentSort = GetRandomSort("parent", parentFields.Length);
-                Sort childSort = GetRandomSort("child", childFields.Length);
-
-                if (VERBOSE)
-                {
-                    Console.WriteLine("\nTEST: query=" + parentQuery + " joinQuery=" + parentJoinQuery + " parentSort=" + parentSort + " childSort=" + childSort);
-                }
-
-                // Merge both sorts:
-                IList<SortField> sortFields = new List<SortField>(Arrays.AsList(parentSort.GetSort()));
-                sortFields.AddRange(Arrays.AsList(childSort.GetSort()));
-                Sort parentAndChildSort = new Sort(sortFields.ToArray());
-
-                TopDocs results = s.Search(parentQuery, null, r.NumDocs, parentAndChildSort);
-
-                if (VERBOSE)
-                {
-                    Console.WriteLine("\nTEST: normal index gets " + results.TotalHits + " hits");
-                    ScoreDoc[] hits = results.ScoreDocs;
-                    for (int hitIDX = 0; hitIDX < hits.Length; hitIDX++)
-                    {
-                        Document doc = s.Doc(hits[hitIDX].Doc);
-                        //System.out.println("  score=" + hits[hitIDX].Score + " parentID=" + doc.Get("parentID") + " childID=" + doc.Get("childID") + " (docID=" + hits[hitIDX].Doc + ")");
-                        Console.WriteLine("  parentID=" + doc.Get("parentID") + " childID=" + doc.Get("childID") + " (docID=" + hits[hitIDX].Doc + ")");
-                        FieldDoc fd = (FieldDoc)hits[hitIDX];
-                        if (fd.Fields != null)
-                        {
-                            Console.Write("    ");
-                            foreach (object o in fd.Fields)
-                            {
-                                if (o is BytesRef)
-                                {
-                                    Console.Write(((BytesRef)o).Utf8ToString() + " ");
-                                }
-                                else
-                                {
-                                    Console.Write(o + " ");
-                                }
-                            }
-                            Console.WriteLine();
-                        }
-                    }
-                }
-
-                bool trackScores;
-                bool trackMaxScore;
-                if (agg == ScoreMode.None)
-                {
-                    trackScores = false;
-                    trackMaxScore = false;
-                }
-                else
-                {
-                    trackScores = Random().NextBoolean();
-                    trackMaxScore = Random().NextBoolean();
-                }
-                ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(parentSort, 10, trackScores, trackMaxScore);
-
-                joinS.Search(parentJoinQuery, c);
-
-                int hitsPerGroup = TestUtil.NextInt(Random(), 1, 20);
-                //final int hitsPerGroup = 100;
-                TopGroups<int> joinResults = c.GetTopGroups(childJoinQuery, childSort, 0, hitsPerGroup, 0, true);
-
-                if (VERBOSE)
-                {
-                    Console.WriteLine("\nTEST: block join index gets " + (joinResults == null ? 0 : joinResults.Groups.Length) + " groups; hitsPerGroup=" + hitsPerGroup);
-                    if (joinResults != null)
-                    {
-                        GroupDocs<int>[] groups = joinResults.Groups;
-                        for (int groupIDX = 0; groupIDX < groups.Length; groupIDX++)
-                        {
-                            GroupDocs<int> group = groups[groupIDX];
-                            if (group.GroupSortValues != null)
-                            {
-                                Console.Write("  ");
-                                foreach (object o in group.GroupSortValues)
-                                {
-                                    if (o is BytesRef)
-                                    {
-                                        Console.Write(((BytesRef)o).Utf8ToString() + " ");
-                                    }
-                                    else
-                                    {
-                                        Console.Write(o + " ");
-                                    }
-                                }
-                                Console.WriteLine();
-                            }
-
-                            assertNotNull(group.GroupValue);
-                            Document parentDoc = joinS.Doc(group.GroupValue);
-                            Console.WriteLine("  group parentID=" + parentDoc.Get("parentID") + " (docID=" + group.GroupValue + ")");
-                            for (int hitIDX = 0; hitIDX < group.ScoreDocs.Length; hitIDX++)
-                            {
-                                Document doc = joinS.Doc(group.ScoreDocs[hitIDX].Doc);
-                                //System.out.println("    score=" + group.ScoreDocs[hitIDX].Score + " childID=" + doc.Get("childID") + " (docID=" + group.ScoreDocs[hitIDX].Doc + ")");
-                                Console.WriteLine("    childID=" + doc.Get("childID") + " child0=" + doc.Get("child0") + " (docID=" + group.ScoreDocs[hitIDX].Doc + ")");
-                            }
-                        }
-                    }
-                }
-
-                if (results.TotalHits == 0)
-                {
-                    assertNull(joinResults);
-                }
-                else
-                {
-                    CompareHits(r, joinR, results, joinResults);
-                    TopDocs b = joinS.Search(childJoinQuery, 10);
-                    foreach (ScoreDoc hit in b.ScoreDocs)
-                    {
-                        Explanation explanation = joinS.Explain(childJoinQuery, hit.Doc);
-                        Document document = joinS.Doc(hit.Doc - 1);
-                        int childId = Convert.ToInt32(document.Get("childID"));
-                        assertTrue(explanation.IsMatch);
-                        assertEquals(hit.Score, explanation.Value, 0.0f);
-                        assertEquals(string.Format("Score based on child doc range from {0} to {1}", hit.Doc - 1 - childId, hit.Doc - 1), explanation.Description);
-                    }
-                }
-
-                // Test joining in the opposite direction (parent to
-                // child):
-
-                // Get random query against parent documents:
-                Query parentQuery2;
-                if (Random().Next(3) == 2)
-                {
-                    int fieldID = Random().Next(parentFields.Length);
-                    parentQuery2 = new TermQuery(new Term("parent" + fieldID, parentFields[fieldID][Random().Next(parentFields[fieldID].Length)]));
-                }
-                else if (Random().Next(3) == 2)
-                {
-                    BooleanQuery bq = new BooleanQuery();
-                    parentQuery2 = bq;
-                    int numClauses = TestUtil.NextInt(Random(), 2, 4);
-                    bool didMust = false;
-                    for (int clauseIDX = 0; clauseIDX < numClauses; clauseIDX++)
-                    {
-                        Query clause;
-                        BooleanClause.Occur occur;
-                        if (!didMust && Random().NextBoolean())
-                        {
-                            occur = Random().NextBoolean() ? BooleanClause.Occur.MUST : BooleanClause.Occur.MUST_NOT;
-                            clause = new TermQuery(RandomParentTerm(parentFields[0]));
-                            didMust = true;
-                        }
-                        else
-                        {
-                            occur = BooleanClause.Occur.SHOULD;
-                            int fieldID = TestUtil.NextInt(Random(), 1, parentFields.Length - 1);
-                            clause = new TermQuery(new Term("parent" + fieldID, parentFields[fieldID][Random().Next(parentFields[fieldID].Length)]));
-                        }
-                        bq.Add(clause, occur);
-                    }
-                }
-                else
-                {
-                    BooleanQuery bq = new BooleanQuery();
-                    parentQuery2 = bq;
-
-                    bq.Add(new TermQuery(RandomParentTerm(parentFields[0])), BooleanClause.Occur.MUST);
-                    int fieldID = TestUtil.NextInt(Random(), 1, parentFields.Length - 1);
-                    bq.Add(new TermQuery(new Term("parent" + fieldID, parentFields[fieldID][Random().Next(parentFields[fieldID].Length)])), Random().NextBoolean() ? BooleanClause.Occur.MUST : BooleanClause.Occur.MUST_NOT);
-                }
-
-                if (VERBOSE)
-                {
-                    Console.WriteLine("\nTEST: top down: parentQuery2=" + parentQuery2);
-                }
-
-                // Maps parent query to child docs:
-                ToChildBlockJoinQuery parentJoinQuery2 = new ToChildBlockJoinQuery(parentQuery2, parentsFilter, Random().NextBoolean());
-
-                // To run against the block-join index:
-                Query childJoinQuery2;
-
-                // Same query as parentJoinQuery, but to run against
-                // the fully denormalized index (so we can compare
-                // results):
-                Query childQuery2;
-
-                // apply a filter to children
-                Filter childFilter2, childJoinFilter2;
-
-                if (Random().NextBoolean())
-                {
-                    childQuery2 = parentQuery2;
-                    childJoinQuery2 = parentJoinQuery2;
-                    childFilter2 = null;
-                    childJoinFilter2 = null;
-                }
-                else
-                {
-                    Term childTerm = RandomChildTerm(childFields[0]);
-                    if (Random().NextBoolean()) // filtered case
-                    {
-                        childJoinQuery2 = parentJoinQuery2;
-                        Filter f = new QueryWrapperFilter(new TermQuery(childTerm));
-                        childJoinFilter2 = Random().NextBoolean() ? new FixedBitSetCachingWrapperFilter(f) : f;
-                    }
-                    else
-                    {
-                        childJoinFilter2 = null;
-                        // AND child field w/ parent query:
-                        BooleanQuery bq = new BooleanQuery();
-                        childJoinQuery2 = bq;
-                        if (Random().NextBoolean())
-                        {
-                            bq.Add(parentJoinQuery2, BooleanClause.Occur.MUST);
-                            bq.Add(new TermQuery(childTerm), BooleanClause.Occur.MUST);
-                        }
-                        else
-                        {
-                            bq.Add(new TermQuery(childTerm), BooleanClause.Occur.MUST);
-                            bq.Add(parentJoinQuery2, BooleanClause.Occur.MUST);
-                        }
-                    }
-
-                    if (Random().NextBoolean()) // filtered case
-                    {
-                        childQuery2 = parentQuery2;
-                        Filter f = new QueryWrapperFilter(new TermQuery(childTerm));
-                        childFilter2 = Random().NextBoolean() ? new FixedBitSetCachingWrapperFilter(f) : f;
-                    }
-                    else
-                    {
-                        childFilter2 = null;
-                        BooleanQuery bq2 = new BooleanQuery();
-                        childQuery2 = bq2;
-                        if (Random().NextBoolean())
-                        {
-                            bq2.Add(parentQuery2, BooleanClause.Occur.MUST);
-                            bq2.Add(new TermQuery(childTerm), BooleanClause.Occur.MUST);
-                        }
-                        else
-                        {
-                            bq2.Add(new TermQuery(childTerm), BooleanClause.Occur.MUST);
-                            bq2.Add(parentQuery2, BooleanClause.Occur.MUST);
-                        }
-                    }
-                }
-
-                Sort childSort2 = GetRandomSort("child", childFields.Length);
-
-                // Search denormalized index:
-                if (VERBOSE)
-                {
-                    Console.WriteLine("TEST: run top down query=" + childQuery2 + " filter=" + childFilter2 + " sort=" + childSort2);
-                }
-                TopDocs results2 = s.Search(childQuery2, childFilter2, r.NumDocs, childSort2);
-                if (VERBOSE)
-                {
-                    Console.WriteLine("  " + results2.TotalHits + " totalHits:");
-                    foreach (ScoreDoc sd in results2.ScoreDocs)
-                    {
-                        Document doc = s.Doc(sd.Doc);
-                        Console.WriteLine("  childID=" + doc.Get("childID") + " parentID=" + doc.Get("parentID") + " docID=" + sd.Doc);
-                    }
-                }
-
-                // Search join index:
-                if (VERBOSE)
-                {
-                    Console.WriteLine("TEST: run top down join query=" + childJoinQuery2 + " filter=" + childJoinFilter2 + " sort=" + childSort2);
-                }
-                TopDocs joinResults2 = joinS.Search(childJoinQuery2, childJoinFilter2, joinR.NumDocs, childSort2);
-                if (VERBOSE)
-                {
-                    Console.WriteLine("  " + joinResults2.TotalHits + " totalHits:");
-                    foreach (ScoreDoc sd in joinResults2.ScoreDocs)
-                    {
-                        Document doc = joinS.Doc(sd.Doc);
-                        Document parentDoc = GetParentDoc(joinR, parentsFilter, sd.Doc);
-                        Console.WriteLine("  childID=" + doc.Get("childID") + " parentID=" + parentDoc.Get("parentID") + " docID=" + sd.Doc);
-                    }
-                }
-
-                CompareChildHits(r, joinR, results2, joinResults2);
-            }
-
-            r.Dispose();
-            joinR.Dispose();
-            dir.Dispose();
-            joinDir.Dispose();
-        }
-        
-        private void CompareChildHits(IndexReader r, IndexReader joinR, TopDocs results, TopDocs joinResults)
-        {
-            assertEquals(results.TotalHits, joinResults.TotalHits);
-            assertEquals(results.ScoreDocs.Length, joinResults.ScoreDocs.Length);
-            for (int hitCount = 0; hitCount < results.ScoreDocs.Length; hitCount++)
-            {
-                ScoreDoc hit = results.ScoreDocs[hitCount];
-                ScoreDoc joinHit = joinResults.ScoreDocs[hitCount];
-                Document doc1 = r.Document(hit.Doc);
-                Document doc2 = joinR.Document(joinHit.Doc);
-                assertEquals("hit " + hitCount + " differs", doc1.Get("childID"), doc2.Get("childID"));
-                // don't compare scores -- they are expected to differ
-
-
-                assertTrue(hit is FieldDoc);
-                assertTrue(joinHit is FieldDoc);
-
-                FieldDoc hit0 = (FieldDoc)hit;
-                FieldDoc joinHit0 = (FieldDoc)joinHit;
-                assertArrayEquals(hit0.Fields, joinHit0.Fields);
-            }
-        }
-        
-        private void CompareHits(IndexReader r, IndexReader joinR, TopDocs results, TopGroups<int> joinResults)
-        {
-            // results is 'complete'; joinResults is a subset
-            int resultUpto = 0;
-            int joinGroupUpto = 0;
-
-            ScoreDoc[] hits = results.ScoreDocs;
-            GroupDocs<int>[] groupDocs = joinResults.Groups;
-
-            while (joinGroupUpto < groupDocs.Length)
-            {
-                GroupDocs<int> group = groupDocs[joinGroupUpto++];
-                ScoreDoc[] groupHits = group.ScoreDocs;
-                assertNotNull(group.GroupValue);
-                Document parentDoc = joinR.Document(group.GroupValue);
-                string parentID = parentDoc.Get("parentID");
-                //System.out.println("GROUP groupDoc=" + group.groupDoc + " parent=" + parentDoc);
-                assertNotNull(parentID);
-                assertTrue(groupHits.Length > 0);
-                for (int hitIDX = 0; hitIDX < groupHits.Length; hitIDX++)
-                {
-                    Document nonJoinHit = r.Document(hits[resultUpto++].Doc);
-                    Document joinHit = joinR.Document(groupHits[hitIDX].Doc);
-                    assertEquals(parentID, nonJoinHit.Get("parentID"));
-                    assertEquals(joinHit.Get("childID"), nonJoinHit.Get("childID"));
-                }
-
-                if (joinGroupUpto < groupDocs.Length)
-                {
-                    // Advance non-join hit to the next parentID:
-                    //System.out.println("  next joingroupUpto=" + joinGroupUpto + " gd.Length=" + groupDocs.Length + " parentID=" + parentID);
-                    while (true)
-                    {
-                        assertTrue(resultUpto < hits.Length);
-                        if (!parentID.Equals(r.Document(hits[resultUpto].Doc).Get("parentID")))
-                        {
-                            break;
-                        }
-                        resultUpto++;
-                    }
-                }
-            }
-        }
-
-        [Test]
-        public void TestMultiChildTypes()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            IList<Document> docs = new List<Document>();
-
-            docs.Add(MakeJob("java", 2007));
-            docs.Add(MakeJob("python", 2010));
-            docs.Add(MakeQualification("maths", 1999));
-            docs.Add(MakeResume("Lisa", "United Kingdom"));
-            w.AddDocuments(docs);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            // Create a filter that defines "parent" documents in the index - in this case resumes
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            // Define child document criteria (finds an example of relevant work experience)
-            BooleanQuery childJobQuery = new BooleanQuery();
-            childJobQuery.Add(new BooleanClause(new TermQuery(new Term("skill", "java")), BooleanClause.Occur.MUST));
-            childJobQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 2006, 2011, true, true), BooleanClause.Occur.MUST));
-
-            BooleanQuery childQualificationQuery = new BooleanQuery();
-            childQualificationQuery.Add(new BooleanClause(new TermQuery(new Term("qualification", "maths")), BooleanClause.Occur.MUST));
-            childQualificationQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 1980, 2000, true, true), BooleanClause.Occur.MUST));
-
-
-            // Define parent document criteria (find a resident in the UK)
-            Query parentQuery = new TermQuery(new Term("country", "United Kingdom"));
-
-            // Wrap the child document query to 'join' any matches
-            // up to corresponding parent:
-            ToParentBlockJoinQuery childJobJoinQuery = new ToParentBlockJoinQuery(childJobQuery, parentsFilter, ScoreMode.Avg);
-            ToParentBlockJoinQuery childQualificationJoinQuery = new ToParentBlockJoinQuery(childQualificationQuery, parentsFilter, ScoreMode.Avg);
-
-            // Combine the parent and nested child queries into a single query for a candidate
-            BooleanQuery fullQuery = new BooleanQuery();
-            fullQuery.Add(new BooleanClause(parentQuery, BooleanClause.Occur.MUST));
-            fullQuery.Add(new BooleanClause(childJobJoinQuery, BooleanClause.Occur.MUST));
-            fullQuery.Add(new BooleanClause(childQualificationJoinQuery, BooleanClause.Occur.MUST));
-
-            // Collects all job and qualification child docs for
-            // each resume hit in the top N (sorted by score):
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(Sort.RELEVANCE, 10, true, false);
-
-            s.Search(fullQuery, c);
-
-            // Examine "Job" children
-            TopGroups<int> jobResults = c.GetTopGroups(childJobJoinQuery, null, 0, 10, 0, true);
-
-            //assertEquals(1, results.totalHitCount);
-            assertEquals(1, jobResults.TotalGroupedHitCount);
-            assertEquals(1, jobResults.Groups.Length);
-
-            GroupDocs<int> group = jobResults.Groups[0];
-            assertEquals(1, group.TotalHits);
-
-            Document childJobDoc = s.Doc(group.ScoreDocs[0].Doc);
-            //System.out.println("  doc=" + group.ScoreDocs[0].Doc);
-            assertEquals("java", childJobDoc.Get("skill"));
-            assertNotNull(group.GroupValue);
-            Document parentDoc = s.Doc(group.GroupValue);
-            assertEquals("Lisa", parentDoc.Get("name"));
-
-            // Now Examine qualification children
-            TopGroups<int> qualificationResults = c.GetTopGroups(childQualificationJoinQuery, null, 0, 10, 0, true);
-
-            assertEquals(1, qualificationResults.TotalGroupedHitCount);
-            assertEquals(1, qualificationResults.Groups.Length);
-
-            GroupDocs<int> qGroup = qualificationResults.Groups[0];
-            assertEquals(1, qGroup.TotalHits);
-
-            Document childQualificationDoc = s.Doc(qGroup.ScoreDocs[0].Doc);
-            assertEquals("maths", childQualificationDoc.Get("qualification"));
-            assertNotNull(qGroup.GroupValue);
-            parentDoc = s.Doc(qGroup.GroupValue);
-            assertEquals("Lisa", parentDoc.Get("name"));
-
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestAdvanceSingleParentSingleChild()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-            Document childDoc = new Document();
-            childDoc.Add(NewStringField("child", "1", Field.Store.NO));
-            Document parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "1", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(childDoc, parentDoc));
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-            Query tq = new TermQuery(new Term("child", "1"));
-            Filter parentFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("parent", "1"))));
-
-            ToParentBlockJoinQuery q = new ToParentBlockJoinQuery(tq, parentFilter, ScoreMode.Avg);
-            Weight weight = s.CreateNormalizedWeight(q);
-            DocIdSetIterator disi = weight.Scorer(s.IndexReader.Leaves.First(), null);
-            assertEquals(1, disi.Advance(1));
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestAdvanceSingleParentNoChild()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())).SetMergePolicy(new LogDocMergePolicy()));
-            Document parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "1", Field.Store.NO));
-            parentDoc.Add(NewStringField("isparent", "yes", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(parentDoc));
-
-            // Add another doc so scorer is not null
-            parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "2", Field.Store.NO));
-            parentDoc.Add(NewStringField("isparent", "yes", Field.Store.NO));
-            Document childDoc = new Document();
-            childDoc.Add(NewStringField("child", "2", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(childDoc, parentDoc));
-
-            // Need single seg:
-            w.ForceMerge(1);
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-            Query tq = new TermQuery(new Term("child", "2"));
-            Filter parentFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isparent", "yes"))));
-
-            ToParentBlockJoinQuery q = new ToParentBlockJoinQuery(tq, parentFilter, ScoreMode.Avg);
-            Weight weight = s.CreateNormalizedWeight(q);
-            DocIdSetIterator disi = weight.Scorer(s.IndexReader.Leaves.First(), null);
-            assertEquals(2, disi.Advance(0));
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        [Test]
-        public void TestGetTopGroups()
-        {
-
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            IList<Document> docs = new List<Document>();
-            docs.Add(MakeJob("ruby", 2005));
-            docs.Add(MakeJob("java", 2006));
-            docs.Add(MakeJob("java", 2010));
-            docs.Add(MakeJob("java", 2012));
-            CollectionsHelper.Shuffle(docs);
-            docs.Add(MakeResume("Frank", "United States"));
-
-            AddSkillless(w);
-            w.AddDocuments(docs);
-            AddSkillless(w);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = new IndexSearcher(r);
-
-            // Create a filter that defines "parent" documents in the index - in this case resumes
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("docType", "resume"))));
-
-            // Define child document criteria (finds an example of relevant work experience)
-            BooleanQuery childQuery = new BooleanQuery();
-            childQuery.Add(new BooleanClause(new TermQuery(new Term("skill", "java")), BooleanClause.Occur.MUST));
-            childQuery.Add(new BooleanClause(NumericRangeQuery.NewIntRange("year", 2006, 2011, true, true), BooleanClause.Occur.MUST));
-
-            // Wrap the child document query to 'join' any matches
-            // up to corresponding parent:
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(Sort.RELEVANCE, 2, true, true);
-            s.Search(childJoinQuery, c);
-
-            //Get all child documents within groups
-            TopGroups<int>[] getTopGroupsResults = new TopGroups<int>[2];
-            getTopGroupsResults[0] = c.GetTopGroups(childJoinQuery, null, 0, 10, 0, true);
-            getTopGroupsResults[1] = c.GetTopGroupsWithAllChildDocs(childJoinQuery, null, 0, 0, true);
-
-            foreach (TopGroups<int> results in getTopGroupsResults)
-            {
-                assertFalse(float.IsNaN(results.MaxScore));
-                assertEquals(2, results.TotalGroupedHitCount);
-                assertEquals(1, results.Groups.Length);
-
-                GroupDocs<int> resultGroup = results.Groups[0];
-                assertEquals(2, resultGroup.TotalHits);
-                assertFalse(float.IsNaN(resultGroup.Score));
-                assertNotNull(resultGroup.GroupValue);
-                Document parentDocument = s.Doc(resultGroup.GroupValue);
-                assertEquals("Frank", parentDocument.Get("name"));
-
-                assertEquals(2, resultGroup.ScoreDocs.Length); //all matched child documents collected
-
-                foreach (ScoreDoc scoreDoc in resultGroup.ScoreDocs)
-                {
-                    Document childDoc = s.Doc(scoreDoc.Doc);
-                    assertEquals("java", childDoc.Get("skill"));
-                    int year = Convert.ToInt32(childDoc.Get("year"));
-                    assertTrue(year >= 2006 && year <= 2011);
-                }
-            }
-
-            //Get part of child documents
-            TopGroups<int> boundedResults = c.GetTopGroups(childJoinQuery, null, 0, 1, 0, true);
-            assertFalse(float.IsNaN(boundedResults.MaxScore));
-            assertEquals(2, boundedResults.TotalGroupedHitCount);
-            assertEquals(1, boundedResults.Groups.Length);
-
-            GroupDocs<int> group = boundedResults.Groups[0];
-            assertEquals(2, group.TotalHits);
-            assertFalse(float.IsNaN(group.Score));
-            assertNotNull(group.GroupValue);
-            Document parentDoc = s.Doc(group.GroupValue);
-            assertEquals("Frank", parentDoc.Get("name"));
-
-            assertEquals(1, group.ScoreDocs.Length); //not all matched child documents collected
-
-            foreach (ScoreDoc scoreDoc in group.ScoreDocs)
-            {
-                Document childDoc = s.Doc(scoreDoc.Doc);
-                assertEquals("java", childDoc.Get("skill"));
-                int year = Convert.ToInt32(childDoc.Get("year"));
-                assertTrue(year >= 2006 && year <= 2011);
-            }
-
-            r.Dispose();
-            dir.Dispose();
-        }
-
-        // LUCENE-4968
-        [Test]
-        public void TestSometimesParentOnlyMatches()
-        {
-            Directory d = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), d);
-            Document parent = new Document();
-            parent.Add(new StoredField("parentID", "0"));
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-
-            IList<Document> docs = new List<Document>();
-
-            Document child = new Document();
-            docs.Add(child);
-            child.Add(new StoredField("childID", "0"));
-            child.Add(NewTextField("childText", "text", Field.Store.NO));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            docs.Clear();
-
-            parent = new Document();
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-            parent.Add(new StoredField("parentID", "1"));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-
-            Query childQuery = new TermQuery(new Term("childText", "text"));
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isParent", "yes"))));
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-            BooleanQuery parentQuery = new BooleanQuery();
-            parentQuery.Add(childJoinQuery, BooleanClause.Occur.SHOULD);
-            parentQuery.Add(new TermQuery(new Term("parentText", "text")), BooleanClause.Occur.SHOULD);
-
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(new Sort(new SortField("parentID", SortField.Type_e.STRING)), 10, true, true);
-            NewSearcher(r).Search(parentQuery, c);
-            TopGroups<int> groups = c.GetTopGroups(childJoinQuery, null, 0, 10, 0, false);
-
-            // Two parents:
-            assertEquals(2, (int)groups.TotalGroupCount);
-
-            // One child docs:
-            assertEquals(1, groups.TotalGroupedHitCount);
-
-            GroupDocs<int> group = groups.Groups[0];
-            Document doc = r.Document((int)group.GroupValue);
-            assertEquals("0", doc.Get("parentID"));
-
-            group = groups.Groups[1];
-            doc = r.Document((int)group.GroupValue);
-            assertEquals("1", doc.Get("parentID"));
-
-            r.Dispose();
-            d.Dispose();
-        }
-
-        // LUCENE-4968
-        [Test]
-        public void TestChildQueryNeverMatches()
-        {
-            Directory d = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), d);
-            Document parent = new Document();
-            parent.Add(new StoredField("parentID", "0"));
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-
-            IList<Document> docs = new List<Document>();
-
-            Document child = new Document();
-            docs.Add(child);
-            child.Add(new StoredField("childID", "0"));
-            child.Add(NewTextField("childText", "text", Field.Store.NO));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            docs.Clear();
-
-            parent = new Document();
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-            parent.Add(new StoredField("parentID", "1"));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-
-            // never matches:
-            Query childQuery = new TermQuery(new Term("childText", "bogus"));
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isParent", "yes"))));
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-            BooleanQuery parentQuery = new BooleanQuery();
-            parentQuery.Add(childJoinQuery, BooleanClause.Occur.SHOULD);
-            parentQuery.Add(new TermQuery(new Term("parentText", "text")), BooleanClause.Occur.SHOULD);
-
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(new Sort(new SortField("parentID", SortField.Type_e.STRING)), 10, true, true);
-            NewSearcher(r).Search(parentQuery, c);
-            TopGroups<int> groups = c.GetTopGroups(childJoinQuery, null, 0, 10, 0, false);
-
-            // Two parents:
-            assertEquals(2, (int)groups.TotalGroupCount);
-
-            // One child docs:
-            assertEquals(0, groups.TotalGroupedHitCount);
-
-            GroupDocs<int> group = groups.Groups[0];
-            Document doc = r.Document((int)group.GroupValue);
-            assertEquals("0", doc.Get("parentID"));
-
-            group = groups.Groups[1];
-            doc = r.Document((int)group.GroupValue);
-            assertEquals("1", doc.Get("parentID"));
-
-            r.Dispose();
-            d.Dispose();
-        }
-
-        // LUCENE-4968
-        [Test]
-        public void TestChildQueryMatchesParent()
-        {
-            Directory d = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), d);
-            Document parent = new Document();
-            parent.Add(new StoredField("parentID", "0"));
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-
-            IList<Document> docs = new List<Document>();
-
-            Document child = new Document();
-            docs.Add(child);
-            child.Add(new StoredField("childID", "0"));
-            child.Add(NewTextField("childText", "text", Field.Store.NO));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            docs.Clear();
-
-            parent = new Document();
-            parent.Add(NewTextField("parentText", "text", Field.Store.NO));
-            parent.Add(NewStringField("isParent", "yes", Field.Store.NO));
-            parent.Add(new StoredField("parentID", "1"));
-
-            // parent last:
-            docs.Add(parent);
-            w.AddDocuments(docs);
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-
-            // illegally matches parent:
-            Query childQuery = new TermQuery(new Term("parentText", "text"));
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isParent", "yes"))));
-            ToParentBlockJoinQuery childJoinQuery = new ToParentBlockJoinQuery(childQuery, parentsFilter, ScoreMode.Avg);
-            BooleanQuery parentQuery = new BooleanQuery();
-            parentQuery.Add(childJoinQuery, BooleanClause.Occur.SHOULD);
-            parentQuery.Add(new TermQuery(new Term("parentText", "text")), BooleanClause.Occur.SHOULD);
-
-            ToParentBlockJoinCollector c = new ToParentBlockJoinCollector(new Sort(new SortField("parentID", SortField.Type_e.STRING)), 10, true, true);
-
-            try
-            {
-                NewSearcher(r).Search(parentQuery, c);
-                fail("should have hit exception");
-            }
-            catch (IllegalStateException ise)
-            {
-                // expected
-            }
-
-            r.Dispose();
-            d.Dispose();
-        }
-
-        [Test]
-        public void TestAdvanceSingleDeletedParentNoChild()
-        {
-            Directory dir = NewDirectory();
-            RandomIndexWriter w = new RandomIndexWriter(Random(), dir);
-
-            // First doc with 1 children
-            Document parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "1", Field.Store.NO));
-            parentDoc.Add(NewStringField("isparent", "yes", Field.Store.NO));
-            Document childDoc = new Document();
-            childDoc.Add(NewStringField("child", "1", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(childDoc, parentDoc));
-
-            parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "2", Field.Store.NO));
-            parentDoc.Add(NewStringField("isparent", "yes", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(parentDoc));
-
-            w.DeleteDocuments(new Term("parent", "2"));
-
-            parentDoc = new Document();
-            parentDoc.Add(NewStringField("parent", "2", Field.Store.NO));
-            parentDoc.Add(NewStringField("isparent", "yes", Field.Store.NO));
-            childDoc = new Document();
-            childDoc.Add(NewStringField("child", "2", Field.Store.NO));
-            w.AddDocuments(Arrays.AsList(childDoc, parentDoc));
-
-            IndexReader r = w.Reader;
-            w.Dispose();
-            IndexSearcher s = NewSearcher(r);
-
-            // Create a filter that defines "parent" documents in the index - in this case resumes
-            Filter parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("isparent", "yes"))));
-
-            Query parentQuery = new TermQuery(new Term("parent", "2"));
-
-            ToChildBlockJoinQuery parentJoinQuery = new ToChildBlockJoinQuery(parentQuery, parentsFilter, Random().NextBoolean());
-            TopDocs topdocs = s.Search(parentJoinQuery, 3);
-            assertEquals(1, topdocs.TotalHits);
-
-            r.Dispose();
-            dir.Dispose();
-        }
-    }
-}
\ No newline at end of file


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