Add delay for creating two conversations

Signed-off-by: Hailong Cui <[email protected]>

plugin/src/test/java/org/opensearch/ml/rest/RestMemoryGetConversationsActionIT.java

@@ -20,6 +20,7 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpHeaders;
@@ -120,7 +121,7 @@ public void testConversations_MorePages() throws IOException {
         assert (((Double) map.get("next_token")).intValue() == 1);
     }
 
-    public void testGetConversations_nextPage() throws IOException {
+    public void testGetConversations_nextPage() throws IOException, InterruptedException {
         Response ccresponse1 = TestHelper.makeRequest(client(), "POST", ActionConstants.CREATE_CONVERSATION_REST_PATH, null, "", null);
         assert (ccresponse1 != null);
         assert (TestHelper.restStatus(ccresponse1) == RestStatus.OK);
@@ -131,6 +132,9 @@ public void testGetConversations_nextPage() throws IOException {
         assert (ccmap1.containsKey("conversation_id"));
         String id1 = (String) ccmap1.get("conversation_id");
 
+        // wait for 0.1s to make sure update time is different between conversation 1 and 2
+        TimeUnit.MICROSECONDS.sleep(100);
+
         Response ccresponse2 = TestHelper.makeRequest(client(), "POST", ActionConstants.CREATE_CONVERSATION_REST_PATH, null, "", null);
         assert (ccresponse2 != null);
         assert (TestHelper.restStatus(ccresponse2) == RestStatus.OK);