IMAP状态显示为已断开连接-NodeJS / JavaScript

Question

我试图弄清楚IMAP到Gmail帐户的状态。

var Imap = require('imap');
var imapConnection = new Imap({
username: '',
password: '',
host: "imap.gmail.com",
port: 993,
debug: console.log
});
function testemail(){
imapConnection.connect();
if(imapConnection.state == 'authenticated'){
console.log('yay authenticated')
}
else{
console.log('No success:'+imapConnection.state)
}
}

**Output display:**

No success:disconnected

․[connection] Connected to host

我很困惑，为什么它说它已连接到主机，而当我打印IMAP的状态时却说“已断开”？