test: ✨ Add test to ensure default socketTimeout is 0

Author: nbbeeken

test/functional/mongo_client_options.test.js

@@ -1,7 +1,8 @@
 'use strict';
-const test = require('./shared').assert,
-  setupDatabase = require('./shared').setupDatabase,
-  expect = require('chai').expect;
+const test = require('./shared').assert;
+const setupDatabase = require('./shared').setupDatabase;
+const expect = require('chai').expect;
+const MongoClient = require('../../lib/mongo_client');
 
 describe('MongoClient Options', function() {
   before(function() {
@@ -96,6 +97,17 @@ describe('MongoClient Options', function() {
     }
   });
 
+  it('should default socketTimeout to infinity', function(done) {
+    const client = new MongoClient(this.configuration.url());
+    client.connect(() => {
+      expect(client.s.options.socketTimeoutMS).to.deep.equal(0);
+      for (const connection of client.topology.s.coreTopology.connections()) {
+        expect(connection.socketTimeout).to.deep.equal(0);
+      }
+      done();
+    });
+  });
+
   /**
    * @ignore
    */