test.js

   global.io.on('connection', (socket) => {
      socket.setMaxListeners(20);
      console.log('index connected')
      socket.emit('notification', {
        unread: 2,
        list: [{
          requestor: {
            name: 'hello',
            id: 'word',
            avatar:'https://semantic-ui.com/images/avatar2/small/rachel.png'
          },
          type: 'addFriend',
          content: 'content',
          createdAt: new Date()
        },
        {
          requestor: {
            name: 'hello',
            id: 'word',
            avatar:'https://semantic-ui.com/images/avatar/small/jenny.jpg'
          },
          type: 'gotLicense',
          content: 'content',
          createdAt: new Date()
        }]
      });

      socket.on('disconnect', () => {
        setTimeout(() => socket.disconnect(true), 5000);

      })