From 44db87a33924838065b680ffca11c445eb8b2fbd Mon Sep 17 00:00:00 2001
From: Durran Jordan <durran@gmail.com>
Date: Tue, 27 Apr 2021 14:01:56 +0200
Subject: [PATCH] fix(sdam): topology no longer causes close event

The topology was emitting both a "topologyClosed" and "close"
event which are bubbled up to the MongoClient. This was causing
two "close" events to be emitted from the MongoClient when the
client is closed.

NODE-3219
---
 lib/core/sdam/topology.js                 | 1 -
 test/functional/operation_example.test.js | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/core/sdam/topology.js b/lib/core/sdam/topology.js
index f18f7785c85..1ca73ee48ab 100644
--- a/lib/core/sdam/topology.js
+++ b/lib/core/sdam/topology.js
@@ -359,7 +359,6 @@ class Topology extends EventEmitter {
           this.emit('topologyClosed', new events.TopologyClosedEvent(this.s.id));
 
           stateTransition(this, STATE_CLOSED);
-          this.emit('close');
 
           if (typeof callback === 'function') {
             callback(err);
diff --git a/test/functional/operation_example.test.js b/test/functional/operation_example.test.js
index 34e87c5ddf4..a4db0658ded 100644
--- a/test/functional/operation_example.test.js
+++ b/test/functional/operation_example.test.js
@@ -3688,10 +3688,9 @@ describe('Operation Examples', function() {
         // REMOVE-LINE done();
         // REMOVE-LINE var db = client.db(configuration.db);
         // BEGIN
-        var db = client.db(configuration.db);
         test.equal(null, err);
 
-        db.on('close', function() {
+        client.on('close', function() {
           done();
         });