Save mongoose document again after deleting it - node.js

Question

I try to unit test my restify node.js-app using mocha and without mocking out the mongodb database. As some tests will alter the database, I'd like to reset its contents before each test.
In my tests I also need to access the mongoose documents I am creating. Thus I have to define them outside of the beforeEach hook (see the user document below).
However, it seems like it's not possible to save a document a second time after emptying the database.
Below is a minimal example I've come up with. The second test will fail in that case, because user won't get saved a second time. If I delete the first test, beforeEach only gets called once and everything works nicely.
Also if I define user inside the beforeEach hook, it works as well.
So my actual question: Is it possible to work around this issue and save a document a second time after deleting it? Or do you have any other idea on how I can reset the database inside the beforeEach hook? What's the proper way to have the same database setup before each test case?
var mongoose = require('mongoose')
var Schema = mongoose.Schema
var should = require('should')
var flow = require('async')
var UserSchema = new Schema({
username: {type: String, required: true, unique: true},
password: {type: String, required: true},
name: {type: String, default: ''}
})
mongoose.model('User', UserSchema)
var User = mongoose.model('User')
describe('test mocha', function() {
var user = new User({
username: 'max',
password: 'asdf'
})
before(function(done) {
var options = {server: {socketOptions: {keepAlive: 1}}}
mongoose.connect('mongodb://localhost/unittest', options, done)
})
beforeEach(function(done) {
flow.series([
function(callback) {
User.collection.remove(callback)
}, function(callback) {
user.save(callback)
}
], function(err, res) {
done()
})
})
it('should pass', function(done) {
true.should.equal(true)
// also access some elements of user here
done()
})
it('should have a user', function(done) {
User.find().exec(function(err, res) {
res.should.not.be.empty
})
done()
})
after(function(done) {
mongoose.disconnect()
done()
})
})

Answer 1

I faced same problem,I generated a copy of the document to save. When need to save the document after deleting it I saved the copy, and it worked. Like
var user = new User({
username: 'max',
password: 'asdf'
});
var userCopy = new User({
username: 'max',
password: 'asdf'
});
And in test cases.
user.remove(callback)
}, function(callback) {
userCopy.save(callback){
// should.not.exist(err)
}
}
It might not be good solution ,but it worked for me.