Fix failing data stream snapshot test (#69425)

Backporting #69004 to 7.12 branch. Co-authored-by: Dan Hermann <danhermann@users.noreply.github.com>
elastic · Feb 23, 2021 · 72ae62e · 72ae62e
1 parent 1be2ebf
commit 72ae62e
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java b/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java
@@ -204,7 +204,11 @@ public void testSnapshot() {
 
     public void testSnapshotWithAllBackingIndicesRemoved() {
         DataStream preSnapshotDataStream = DataStreamTestHelper.randomInstance();
-        List<Index> indicesToAdd = DataStreamTestHelper.randomIndexInstances();
+        List<Index> indicesToAdd = new ArrayList<>();
+        while (indicesToAdd.isEmpty()) {
+            // ensure at least one index
+            indicesToAdd.addAll(DataStreamTestHelper.randomIndexInstances());
+        }
 
         DataStream postSnapshotDataStream = new DataStream(
             preSnapshotDataStream.getName(),