From fa935cf6ac7a76042e5f5c6188719ab6a2cde429 Mon Sep 17 00:00:00 2001
From: Adrien Grand <jpountz@gmail.com>
Date: Thu, 11 Jan 2018 20:08:14 +0100
Subject: [PATCH] SOLR-11846: Force BM25Similarity on
 TestFieldCacheSort.testFieldScoreReverse.

This test expects scores to increase with freq, which not all similarities guarantee.
---
 .../test/org/apache/solr/uninverting/TestFieldCacheSort.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/solr/core/src/test/org/apache/solr/uninverting/TestFieldCacheSort.java b/solr/core/src/test/org/apache/solr/uninverting/TestFieldCacheSort.java
index 9588e67dff9..2c0862fe4f4 100644
--- a/solr/core/src/test/org/apache/solr/uninverting/TestFieldCacheSort.java
+++ b/solr/core/src/test/org/apache/solr/uninverting/TestFieldCacheSort.java
@@ -50,6 +50,7 @@ import org.apache.lucene.search.Sort;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.search.TopDocs;
+import org.apache.lucene.search.similarities.BM25Similarity;
 import org.apache.lucene.store.Directory;
 import org.apache.solr.uninverting.UninvertingReader.Type;
 import org.apache.lucene.util.LuceneTestCase;
@@ -434,6 +435,8 @@ public class TestFieldCacheSort extends LuceneTestCase {
     writer.close();
     
     IndexSearcher searcher = newSearcher(ir);
+    // this test expects the freq to make doc 1 scores greater than doc 0
+    searcher.setSimilarity(new BM25Similarity());
     Sort sort = new Sort(new SortField(null, SortField.Type.SCORE, true));
 
     TopDocs actual = searcher.search(new TermQuery(new Term("value", "foo")), 10, sort);