mongojs/test/test-update-and-callback.js

var insert = require('./insert')

insert('update and callback', [{
  hello: 'world'
}], function (db, t, done) {
  var sync = true
  db.a.update({hello: 'world'}, {$set: {hello: 'verden'}}, function (err, lastErrorObject) {
    t.ok(!sync)
    t.error(err)
    t.equal(lastErrorObject.n, 1)

    done()
  })
  sync = false
})