dynogels/test/item-test.js

DynamoDB data mapper

'use strict';

const Item = require('../lib/item');
const Table = require('../lib/table');
const Schema = require('../lib/schema');
const chai = require('chai');
const expect = chai.expect;
const helper = require('./test-helper');
const serializer = require('../lib/serializer');
const Joi = require('joi');

chai.should();

describe('item', () => {
  let table;

  beforeEach(() => {
    const config = {
      hashKey: 'num',
      schema: {
        num: Joi.number(),
        name: Joi.string()
      }
    };

    const schema = new Schema(config);

    table = new Table('mockTable', schema, serializer, helper.mockDocClient(), helper.testLogger());
  });

  it('JSON.stringify should only serialize attrs', () => {
    const attrs = { num: 1, name: 'foo' };
    const item = new Item(attrs, table);
    const stringified = JSON.stringify(item);

    stringified.should.equal(JSON.stringify(attrs));
  });

  describe('#save', () => {
    it('should return error', done => {
      table.docClient.put.yields(new Error('fail'));

      const attrs = { num: 1, name: 'foo' };
      const item = new Item(attrs, table);

      item.save((err, data) => {
        expect(err).to.exist;
        expect(data).to.not.exist;

        return done();
      });
    });
  });

  describe('#update', () => {
    it('should return item', done => {
      table.docClient.update.yields(null, { Attributes: { num: 1, name: 'foo' } });

      const attrs = { num: 1, name: 'foo' };
      const item = new Item(attrs, table);

      item.update((err, data) => {
        expect(err).to.not.exist;
        expect(data.get()).to.eql({ num: 1, name: 'foo' });

        return done();
      });
    });


    it('should return error', done => {
      table.docClient.update.yields(new Error('fail'));

      const attrs = { num: 1, name: 'foo' };
      const item = new Item(attrs, table);

      item.update((err, data) => {
        expect(err).to.exist;
        expect(data).to.not.exist;

        return done();
      });
    });

    it('should return null', done => {
      table.docClient.update.yields(null, {});

      const attrs = { num: 1, name: 'foo' };
      const item = new Item(attrs, table);

      item.update((err, data) => {
        expect(err).to.not.exist;
        expect(data).to.not.exist;

        return done();
      });
    });
  });
});