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@soarez
Forked from tdantas/model.js
Last active Aug 29, 2015
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var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');
var Schema = mongoose.Schema;
var PageSchema = Schema({
title: { type: String, default: '', trim: true },
url: { type: String, default: '', trim: true },
thumbnails: {type: Schema.ObjectId, ref: 'Thumbnail'},
});
var Page = mongoose.model('Page', PageSchema);
Page.schema.post('save', function(doc) {
if(doc.thumbnails) return;
Thumbnail.generate(doc.url, function(err, thumb){
if (err)
throw err; // TODO: deal with error
doc.thumbnails = thumb;
doc.save();
});
});
var ThumbnailSchema = Schema({
domain: {type: String, trim: true},
url: {
small: { type: String, trim: true },
original: {type: String, trim: true }
}
});
ThumbnailSchema.statics.generate = function(doc, cb) {
// generate site preview , save the thumbnail and call cb
cb(null, new Thumbnail());
};
var Thumbnail = mongoose.model('Thumbnail', ThumbnailSchema);
require('../');
var assert = require('assert');
var mongoose = require('mongoose');
var Page = mongoose.model('Page');
var Thumbnail = mongoose.model('Thumbnail');
it('generates thumbnail if page does not have one', function(done) {
// Add another post save hook to page.
// Becase it doesn't have a thumbnail, so one should be created, added
// to the page and the page will be saved again, so we can expect this
// to fire twice.
var pageAttr = { title: 'Gist web page', url: 'http://www.gist.github.com' };
var count = 0, expected = 2;
var page = new Page(pageAttr);
page.on('save', postPageSaveA);
page.save();
function postPageSaveA(doc) {
++count;
assert(count <= expected, 'post saved fired too many times');
// delay the next test to allow this test to fail for firing too many times
if (count === expected)
setTimeout(doUpdate, 400);
}
function doUpdate() {
// Now change the doc and save it again, now it should fire only once
page.url += '/changed';
page.removeListener('save', postPageSaveA);
count = 0; expected = 1;
page.on('save', postPageSaveB);
page.save();
}
function postPageSaveB(doc) {
++count;
assert(count <= expected, 'post saved fired too many times');
// same thing, delay finish to allow failure
if (count === expected)
setTimeout(done, 400);
}
});
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