From 406aef8a4b4a138fce3d2db5914a37d8d17ca78f Mon Sep 17 00:00:00 2001
From: Nhat Nguyen <nhat.nguyen@elastic.co>
Date: Sun, 16 May 2021 18:00:04 -0400
Subject: [PATCH] LUCENE-9935: Fix testRandomStoredFieldsWithIndexSort

Skip verifying if the list of live ids is empty
---
 .../apache/lucene/index/BaseStoredFieldsFormatTestCase.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lucene/test-framework/src/java/org/apache/lucene/index/BaseStoredFieldsFormatTestCase.java b/lucene/test-framework/src/java/org/apache/lucene/index/BaseStoredFieldsFormatTestCase.java
index e2a10d768b39..a6af7a294210 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/index/BaseStoredFieldsFormatTestCase.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/index/BaseStoredFieldsFormatTestCase.java
@@ -899,6 +899,9 @@ public void testRandomStoredFieldsWithIndexSort() throws Exception {
     List<String> addedIds = new ArrayList<>();
     Runnable verifyStoreFields =
         () -> {
+          if (addedIds.isEmpty()) {
+            return;
+          }
           try (DirectoryReader reader = maybeWrapWithMergingReader(iw.getReader())) {
             IndexSearcher searcher = new IndexSearcher(reader);
             int iters = TestUtil.nextInt(random(), 1, 10);