Fix testCleanUpCommitsWhenGlobalCheckpointAdvanced

Relates #48559

Author: dnhatn

server/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java

@@ -4972,11 +4972,15 @@ public void testCleanUpCommitsWhenGlobalCheckpointAdvanced() throws Exception {
                 }
             }
             engine.flush(false, randomBoolean());
-            List<IndexCommit> commits = DirectoryReader.listCommits(store.directory());
-            // Global checkpoint advanced but not enough - all commits are kept.
-            globalCheckpoint.set(randomLongBetween(globalCheckpoint.get(), engine.getPersistedLocalCheckpoint() - 1));
+            globalCheckpoint.set(randomLongBetween(globalCheckpoint.get(), engine.getPersistedLocalCheckpoint()));
             engine.syncTranslog();
-            assertThat(DirectoryReader.listCommits(store.directory()), equalTo(commits));
+            List<IndexCommit> commits = DirectoryReader.listCommits(store.directory());
+            assertThat(Long.parseLong(commits.get(0).getUserData().get(SequenceNumbers.MAX_SEQ_NO)),
+                lessThanOrEqualTo(globalCheckpoint.get()));
+            for (int i = 1; i < commits.size(); i++) {
+                assertThat(Long.parseLong(commits.get(i).getUserData().get(SequenceNumbers.MAX_SEQ_NO)),
+                    greaterThan(globalCheckpoint.get()));
+            }
             // Global checkpoint advanced enough - only the last commit is kept.
             globalCheckpoint.set(randomLongBetween(engine.getPersistedLocalCheckpoint(), Long.MAX_VALUE));
             engine.syncTranslog();