JavaScript for Line of Business Applications

How to improve your Ember-CLI app's tests with Sinon.js for both QUnit and Mocha frameworks.

An open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io.

In this tip, I would like to describe how to perform E2E (End to End) Test using Protractor for an Angular JS page/site.

I switched over to Karma to test my components, and spent my time building my test assets and loading them up to Karma, but that ended up being kind of slow because I never cached the builds and ran a clean webpack build for each bundle. Ugh. Facebook went on to release Jest and I switched over. I thought it was great, but I quickly ran into some issues...

Use Istanbul to get an in-depth look at what you currently are and aren't testing in your JavaScript app.

Rather than using test coverage as a measure of developer thoroughness, it makes a lot more sense to use coverage as a way of seeing which code isn't covered (hint: it's often else branches). That information can then be used to prioritize testing goals.

In summary: don't use code coverage to measure what's tested, use it to find out what isn't.

Unit testing is great: it’s the best way to see if an algorithm does the right thing every time, or to check our input validation logic, or data transformations, or any other isolated operation. Unit testing is perfect for fundamentals.

But front-end code isn’t about manipulating data. It’s about user events and rendering the right views at the right time. Front-ends are about users.

Here’s what we want to be able to do:

• Test user events
• Test the response to those events
• Make sure the right things render at the right time
• Run tests in many browsers
• Re-run tests on file changes
• Work with continuous integration systems like Travis

In the ten years I’ve been doing this, I hadn’t found a decent way to test user interaction and view rendering until I started poking at React.

Unit testing is an essential part of software engineering. Tests provide living documentation of expected behaviors, prevent regressions, and facilitate refactoring. Web applications benefit from testing as much as any other kind of software.

In recent years there’s been a proliferation of JavaScript frameworks and testing tools. Piecing together a combination of tools that works well can be daunting. We useReact.js components in CycleDash, so in this post I’ll describe our usage of Mocha for testing React with JSX and ECMAScript 6 (Harmony).

Let's look at how to test an AngularJS application with Protractor and Karma!

Part 1 - In the first part we’ll look at unit tests, which ensure that small, isolated pieces of code (e.g., a unit) behave as expected.
Part 2 - In part two we’ll address E2E tests, which verify that all the pieces of code (units) fit together by simulating the user experience through browser automation.

If you’ve ever used AngularJS, you’ll know that it has a pretty cool built-in testing setup - Karma for unit testing, and Protractor for end-to-end testing. I love Protractor, but recently ran into issues when trying to use it for a non-Angular project. Here’s how to get it working.

If you’ve not encountered end-to-end testing before, you’re in for a treat. Unlike unit testing, which is designed to validate very small components, an end-to-end test can be used to simulate how a user will actually interact with your website. We can make it go to a page, click a link, check the right page gets loaded, give it some input, check it displays the correct output - whatever you want, really. Used in conjunction with other forms of testing, it gives us a really useful look at how our site’s working, and is great for helping us catch any sneaky regressions.

Wallaby.js is a continuous test runner. It runs your tests as you type and displays various results right inside your code editor. Wallaby.js allows you to test your React applications and get an instant feedback from your tests, no matter how large your codebase is and whether you are using browser environment or node.js with jsdom. With wallaby.js, you can use any popular testing framework of your choice.

In this article I will describe how to test React application, specifically React components, using Jasmine and wallaby.js with code coverage, including code coverage inside JSX element JavaScript expressions. You can find the full code in this repository.

QUnit’s setup is fairly simple and is easy to use. To get started, I will be using a simple boilerplate webpage. Notice that the two files required for QUnit (qunit-x.js and qunit-x.css) are included in the page source. Additionally, I have some inline JavaScript for which QUnit tests will be written. home.html Within tests.js, I …

Wallaby.js is an intelligent test runner for JavaScript that continuously runs your tests. It reports code coverage and other results directly to your code editor immediately as you change your code. Wallaby.js uses various tricks to run your tests as fast as possible, such as dependency analysis to only execute tests affected by your code changes and parallel test execution.