an example for https://github.com/scottwrobinson/camo/issues/57

camobug.js

"use strict";
// https://github.com/scottwrobinson/camo/issues/57
const Document = require('camo').Document;
const assert = require('assert');

class Foo extends Document {
  constructor() {
    super();
    this.bar = String;
  }

  preValidate() {
    return Promise.reject("must not save!");
  }
}

var connect = require('camo').connect;

var database;
var uri = 'nedb://memory';

connect(uri).then(() => {
  console.log("I am unstoppable!!!");
  return Foo.create({bar: 'bar'}).save();
})
.then(() => {
  assert.ifError("You can't stop me do you?");
}, err => {
  assert.strictEqual(err , "must not save!");
  console.log("OK: well, it did stop me.... phew!");
})
.catch(e => console.log("FAIL: %s", e))