From dbfe4f5cd9231f3d9749cc44c1f0a471eb7a9880 Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@mongodb.com>
Date: Thu, 22 Aug 2019 12:12:04 -0400
Subject: [PATCH] refactor: check err.code exists before checking if its in a
 set

---
 lib/core/error.js                             | 2 +-
 test/functional/connections_stepdown_tests.js | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/core/error.js b/lib/core/error.js
index 0aebb093eb..757c26229a 100644
--- a/lib/core/error.js
+++ b/lib/core/error.js
@@ -192,7 +192,7 @@ function isNotMasterError(err) {
 }
 
 function isNodeShuttingDownError(err) {
-  return SDAM_NODE_SHUTTING_DOWN_ERROR_CODES.has(err.code);
+  return err.code && SDAM_NODE_SHUTTING_DOWN_ERROR_CODES.has(err.code);
 }
 
 /**
diff --git a/test/functional/connections_stepdown_tests.js b/test/functional/connections_stepdown_tests.js
index 0ef0c1d0a2..f167c0521a 100644
--- a/test/functional/connections_stepdown_tests.js
+++ b/test/functional/connections_stepdown_tests.js
@@ -4,7 +4,9 @@ const chai = require('chai');
 const expect = chai.expect;
 
 function ignoreNsNotFound(err) {
-  if (!err.message.match(/ns not found/)) throw err;
+  if (!err.message.match(/ns not found/)) {
+    throw err;
+  }
 }
 
 function connectionCount(db) {