Unit model test

expense-test.js

import Ember from 'ember';
const { run } = Ember;
import { moduleForModel, test } from 'ember-qunit';
import startMirage from '../../helpers/setup-mirage-for-integration';
import Pretender from 'pretender';

let expense, store, user, serverz; 

moduleForModel('expense', 'Unit | Model | expense', {
  // belongsTo User w/ validation from ember-cp-validations
  needs: ['model:user', 'validator:presence', 'validator:length', 'validator:format'],
  beforeEach: function() {
    const container = this.container;
    store = container.lookup('service:store');
    startMirage(this.container);
    // to allow save and start with hasDirtyAttributes === false
    serverz = new Pretender(function() {
      this.post('/expenses', function() {
        var response = {
          'data':
            {'id': '1', 'type': 'expense', 'attributes': {'id': '1'}, 
              'included': { 'status': {} }},
        };
        return [201, { 'Content-Type': 'application/vnd.api+json' }, JSON.stringify(response)];
      }); 
    }); 
    run(() => {
      // Mirage
      server.createList('user', 2); // belongsTo
      // Ember Data - need access to relationship and dirty tracking methods
      user = store.createRecord('user', server.db.users[0]);
      expense = store.createRecord('expense', { id: 1, assignee: user, assigneeId: user.get('id') }); // setup belongsTo
      expense.save(); // mocked out from pretender call but on the flipside makes the expense model clean (hasDirtyAttributes is false)
    });
  },
  afterEach(){
    serverz.shutdown();
  }
});

// Dirty and Relationships

test('amount is dirty trackable', function(assert) {
  // Ember Data specific
  assert.notOk(expense.get('hasDirtyAttributes'));
  // I wrote this myself
  assert.ok(expense.get('relationshipsIsNotDirty'));
  assert.equal(expense.get('amount'), undefined);
  run(() => {
    expense.set('amount', 'zzwatttt');
  });
  assert.equal(expense.get('id'), 1);
  assert.equal(expense.get('amount'), 'zzwatttt');
  assert.ok(expense.get('hasDirtyAttributes'));
  assert.ok(expense.get('relationshipsIsNotDirty'));
});