From 8466cc77baf12f53bc0e00bb3c88b11339140105 Mon Sep 17 00:00:00 2001
From: Mike McCandless <mikemccand@apache.org>
Date: Sat, 12 Nov 2016 10:43:45 -0500
Subject: [PATCH] LUCENE-7557: use BM25Similarity for this test

---
 .../lucene/search/grouping/GroupingSearchTest.java     | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lucene/grouping/src/test/org/apache/lucene/search/grouping/GroupingSearchTest.java b/lucene/grouping/src/test/org/apache/lucene/search/grouping/GroupingSearchTest.java
index d13bfd73e4b..1a1e8af7ed8 100644
--- a/lucene/grouping/src/test/org/apache/lucene/search/grouping/GroupingSearchTest.java
+++ b/lucene/grouping/src/test/org/apache/lucene/search/grouping/GroupingSearchTest.java
@@ -16,6 +16,10 @@
  */
 package org.apache.lucene.search.grouping;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
 import org.apache.lucene.analysis.MockAnalyzer;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field;
@@ -31,15 +35,12 @@ import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.Sort;
 import org.apache.lucene.search.TermQuery;
+import org.apache.lucene.search.similarities.BM25Similarity;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.LuceneTestCase;
 import org.apache.lucene.util.mutable.MutableValueStr;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
 public class GroupingSearchTest extends LuceneTestCase {
 
   // Tests some very basic usages...
@@ -115,6 +116,7 @@ public class GroupingSearchTest extends LuceneTestCase {
     w.addDocument(doc);
 
     IndexSearcher indexSearcher = newSearcher(w.getReader());
+    indexSearcher.setSimilarity(new BM25Similarity());
     w.close();
 
     Sort groupSort = Sort.RELEVANCE;