Fixing flakiness for ApproximatePointRangeQuery.testApproximateRangeS…

…hortCircuitAscSort by enforcing sorting behavior after collecting docIDs (#15727) (#15871)

(cherry picked from commit 7cb2bd0)

Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

server/src/test/java/org/opensearch/search/approximate/ApproximatePointRangeQueryTests.java

@@ -13,9 +13,12 @@
 import org.apache.lucene.analysis.core.WhitespaceAnalyzer;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.LongPoint;
+import org.apache.lucene.document.NumericDocValuesField;
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
+import org.apache.lucene.search.Sort;
+import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.TopDocs;
 import org.apache.lucene.search.TotalHits;
 import org.apache.lucene.store.Directory;
@@ -26,6 +29,7 @@
 
 import java.io.IOException;
 
+import static java.util.Arrays.asList;
 import static org.apache.lucene.document.LongPoint.pack;
 import static org.mockito.Mockito.mock;
 
@@ -253,8 +257,7 @@ public void testApproximateRangeShortCircuitAscSort() throws IOException {
                     for (int v = 0; v < dims; v++) {
                         scratch[v] = i;
                     }
-                    doc.add(new LongPoint("point", scratch));
-                    iw.addDocument(doc);
+                    iw.addDocument(asList(new LongPoint("point", scratch[0]), new NumericDocValuesField("point", scratch[0])));
                 }
                 iw.flush();
                 iw.forceMerge(1);
@@ -277,8 +280,9 @@ protected String toString(int dimension, byte[] value) {
                         Query query = LongPoint.newRangeQuery("point", lower, upper);
                         ;
                         IndexSearcher searcher = new IndexSearcher(reader);
-                        TopDocs topDocs = searcher.search(approximateQuery, 10);
-                        TopDocs topDocs1 = searcher.search(query, 10);
+                        Sort sort = new Sort(new SortField("point", SortField.Type.LONG));
+                        TopDocs topDocs = searcher.search(approximateQuery, 10, sort);
+                        TopDocs topDocs1 = searcher.search(query, 10, sort);
 
                         // since we short-circuit from the approx range at the end of size these will not be equal
                         assertNotEquals(topDocs.totalHits, topDocs1.totalHits);