From 317055bb1ba17b9a752349bf264b1b9709fc481d Mon Sep 17 00:00:00 2001
From: Dan Aprahamian <dan.aprahamian@gmail.com>
Date: Thu, 13 Jun 2019 15:48:51 -0400
Subject: [PATCH] fix(cursor): do not truncate an existing Long

Port of mongodb-js/mongodb-core#441 to native.
---
 lib/core/cursor.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/core/cursor.js b/lib/core/cursor.js
index efeaa7b983..66f6639896 100644
--- a/lib/core/cursor.js
+++ b/lib/core/cursor.js
@@ -683,7 +683,7 @@ function initializeCursor(cursor, callback) {
 
       // Otherwise fall back to regular find path
       const cursorId = result.cursorId || 0;
-      cursor.cursorState.cursorId = Long.fromNumber(cursorId);
+      cursor.cursorState.cursorId = cursorId instanceof Long ? cursorId : Long.fromNumber(cursorId);
       cursor.cursorState.documents = result.documents;
       cursor.cursorState.lastCursorId = result.cursorId;