Example component test from Skylight

test.js

// from https://www.skylight.io

import Ember from "ember";
import { test, moduleForComponent } from 'ember-qunit';
import Util from "app/system/util";

var run = Ember.run;

moduleForComponent("billing-trial-status", "billing-trial-status component", {
  needs: [
    'component:calendar-date',
    'template:components/calendar-date',
    'helper:format-date'
  ]
});

function trim(str) {
  return str.trim().replace(/\s+/g, ' ');
}

function dateFor(str) {
  return window.moment(str).toDate();
}

function setNow(str) {
  Util.adjustedNow = function() {
    return window.moment(str).toDate();
  };
}

test("it should show a calendar if there's a trial end date", function() {
  var component = this.subject();

  run(function() {
    component.set('trialEnd', dateFor("2013-02-08"));
  });

  equal(trim(this.$('.month').text()), "Feb");
  equal(trim(this.$('.day-of-month').text()), "08");
});

test("it should state when the trial expires if it has started", function() {
  var component = this.subject();

  run(function() {
    setNow("2013-02-06");
    component.set('trialEnd', dateFor("2013-02-08"));
    component.set('trialDuration', 30);
  });

  equal(trim(this.$('h3').text()), "Your 30-day trial expires in 2 days on February 8, 2013.");
});

test("it should provide instructions if the trial has not yet started", function() {
  var component = this.subject();

  run(function() {
    setNow("2013-02-06");
    component.set('trialDuration', 30);
  });

  equal(trim(this.$('h3').text()), "Your 30-day trial will begin once you create your first application or add a credit card.");
});