Nodejs Google Drive API

Nodejs Google Drive API

I am trying to understand how the authorization(particular the refresh
tokens) working for nodejs Google Drive API.
Here it's the code from https://github.com/google/google-api-nodejs-client.
oauth2Client.credentials = {
access_token: 'ACCESS TOKEN HERE',
refresh_token: 'REFRESH TOKEN HERE'
};
client
.plus.people.get({ userId: 'me' })
.withAuthClient(oauth2Client)
.execute(callback);
General Question: How does refresh tokens actually work together with
access token?
Background: As what I interpret is that each access token has a limited
timespan (~1 hr). So when a user FIRST connect to my server (which the
server provides mechanism for user authentication), the server receives
limited-life access token and ONE-TIME refresh token. After 1 hour, the
access token is expired.
Specific question: Here comes to the key questions. After the expiration,
my server stills send request to the Google Drive Api with the EXPIRED
access token and refresh token (Server uses session to store those
values). Will this still be able to access the content in Google Drive?
What I am guessing is that the nodejs lib + google drive api is SMART
enough to detect the access token is expired & refresh token is identified
& api replace the expired access token with new access token blindly (like
server does not need to do anything; just google drive api). Will the api
response the server with a new Access Code?
I need to figure this out because I need to organize my code in Nodejs
effectively.
Thanks!