Update definitions for connect-mongo 3.0 (#39278)

types/connect-mongo/connect-mongo-tests.ts

@@ -11,42 +11,47 @@ var MongoStore = connectMongo(session);
 
 /// Use MongoStore
 
+var url = 'mongodb://localhost/test';
+
 // MongoUrlOptions
 app.use(session({
     secret: 'secret',
-    store: new MongoStore({url: 'mongodb://localhost/test'})
+    store: new MongoStore({url})
 }));
 
 
 app.use(session({
     secret: 'secret',
     store: new MongoStore({
-        url: 'mongodb://localhost/test',
+        url,
         collection: "test-sessions",
         ttl: 30 * 24 * 60 * 60 // = 30 days
     })
 }));
 
 // MongooseConnectionOptions
-mongoose.connect('mongodb://localhost/test')
+mongoose.connect(url)
 app.use(session({
     secret: 'secret',
     store: new MongoStore({mongooseConnection: mongoose.connection})
 }));
 
 // NativeMongoOptions
-var Db = mongodb.Db
-var Server = mongodb.Server
-var mongoDb = new Db('test', new Server('localhost', 27017));
-app.use(session({
-    secret: 'secret',
-    store: new MongoStore({db: mongoDb})
-}));
+var MongoClient = mongodb.MongoClient;
+MongoClient.connect(url, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+}).then(client => {
+    app.use(session({
+        secret: 'secret',
+        store: new MongoStore({ client })
+    }));
+});
 
 // NativeMongoPromiseOptions
 var Client = mongodb.MongoClient;
-var mongoDbPromise = Client.connect('mongodb://localhost/test').then(client => client.db())
+var clientPromise = Client.connect(url);
 app.use(session({
     secret: 'secret',
-    store: new MongoStore({ dbPromise: mongoDbPromise })
+    store: new MongoStore({ clientPromise })
 }));

types/connect-mongo/index.d.ts

@@ -1,6 +1,7 @@
-// Type definitions for connect-mongo
+// Type definitions for connect-mongo 3.0
 // Project: https://github.com/kcbanner/connect-mongo
 // Definitions by: Mizuki Yamamoto <https://github.com/Syati>
+//                 Guy Ellis <https://github.com/guyellis>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
 
@@ -92,11 +93,11 @@ declare namespace connectMongo {
     }
 
     export interface NativeMongoOptions extends DefaultOptions {
-        db: mongodb.Db;
+        client: mongodb.MongoClient;
     }
 
     export interface NativeMongoPromiseOptions extends DefaultOptions {
-        dbPromise: Promise<mongodb.Db>;
+        clientPromise: Promise<mongodb.MongoClient>;
     }
 
     export interface MongoStoreFactory {