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Jest

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3.8K
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175
Vorlon.JS

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3
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0
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Jest vs Vorlon.JS: What are the differences?

What is Jest? Painless JavaScript Unit Testing. Jest provides you with multiple layers on top of Jasmine.

What is Vorlon.JS? An open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. It is a remote debugging and testing tool for JavaScript. It helps you remotely load inspect, test and debug JavaScript code running on any device with a web browser: whether it's a games console, mobile device or fridge.

Jest and Vorlon.JS can be categorized as "Javascript Testing Framework" tools.

Some of the features offered by Jest are:

  • Familiar Approach: Built on top of the Jasmine test framework, using familiar expect(value).toBe(other) assertions
  • Mock by Default: Automatically mocks CommonJS modules returned by require(), making most existing code testable
  • Short Feedback Loop: DOM APIs are mocked and tests run in parallel via a small node.js command line utility

On the other hand, Vorlon.JS provides the following key features:

  • Easy setup
  • Remotely connect up to 50 devices simultaneously. Run your code on each or all of them with a single click
  • Debug JavaScript on nearly any platform with a web environment. Plugins allow you to add new features and resources

Jest is an open source tool with 28.2K GitHub stars and 3.89K GitHub forks. Here's a link to Jest's open source repository on GitHub.

Decisions about Jest and Vorlon.JS
Shared insights
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CypressCypressJestJest

As we all know testing is an important part of any application. To assist with our testing we are going to use both Cypress and Jest. We feel these tools complement each other and will help us get good coverage of our code. We will use Cypress for our end to end testing as we've found it quite user friendly. Jest will be used for our unit tests because we've seen how many larger companies use it with great success.

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Postman will be used to do integration testing with the backend API we create. It offers a clean interface to create many requests, and you can even organize these requests into collections. It helps to test the backend API first to make sure it's working before using it in the front-end. Jest can also be used for testing and is already embedded into React. Not only does it offer unit testing support in javascript, it can also do snapshot testing for the front-end to make sure components are rendering correctly. Enzyme is complementary to Jest and offers more functions such as shallow rendering. UnitTest will be used for Python testing as it is simple, has a lot of functionality and already built in with python. Sentry will be used for keeping track of errors as it is also easily integratable with Heroku because they offer it as an add-on. LogDNA will be used for tracking logs which are not errors and is also a Heroku add-on. Its good to have a separate service to record logs, monitor, track and even fix errors in real-time so our application can run more smoothly.

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Pros of Jest
Pros of Vorlon.JS
  • 36
    Open source
  • 32
    Mock by default makes testing much simpler
  • 23
    Testing React Native Apps
  • 20
    Parallel test running
  • 16
    Fast
  • 13
    Bundled with JSDOM to enable DOM testing
  • 8
    Mock by default screws up your classes, breaking tests
  • 7
    Out of the box code coverage
  • 7
    Promise support
  • 6
    One stop shop for unit testing
  • 3
    Great documentation
  • 2
    Assert Library Included
  • 1
    Built in watch option with interactive filtering menu
  • 1
    Preset support
  • 0
    Can be used for BDD
  • 0
    Karma
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    Cons of Jest
    Cons of Vorlon.JS
    • 4
      Documentation
    • 4
      Ambiguous configuration
    • 3
      Difficult
    • 2
      Many bugs still not fixed months/years after reporting
    • 2
      Multiple error messages for same error
    • 2
      Difficult to run single test/describe/file
    • 2
      Ambiguous
    • 2
      Bugged
    • 1
      BeforeAll timing out makes all passing tests fail
    • 1
      Slow
    • 1
      Reporter is too general
    • 1
      Unstable
    • 1
      Bad docs
    • 1
      Still does't support .mjs files natively
    • 1
      Can't fail beforeAll to abort tests
    • 0
      Interaction with watch mode on terminal
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      What is Jest?

      Jest provides you with multiple layers on top of Jasmine.

      What is Vorlon.JS?

      It is a remote debugging and testing tool for JavaScript. It helps you remotely load inspect, test and debug JavaScript code running on any device with a web browser: whether it's a games console, mobile device or fridge.

      Need advice about which tool to choose?Ask the StackShare community!

      What companies use Jest?
      What companies use Vorlon.JS?
        No companies found
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        What tools integrate with Jest?
        What tools integrate with Vorlon.JS?

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        Blog Posts

        What are some alternatives to Jest and Vorlon.JS?
        Mocha
        Mocha is a feature-rich JavaScript test framework running on node.js and the browser, making asynchronous testing simple and fun. Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases.
        Selenium
        Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that. Boring web-based administration tasks can (and should!) also be automated as well.
        AVA
        Even though JavaScript is single-threaded, IO in Node.js can happen in parallel due to its async nature. AVA takes advantage of this and runs your tests concurrently, which is especially beneficial for IO heavy tests. In addition, test files are run in parallel as separate processes, giving you even better performance and an isolated environment for each test file.
        Enzyme
        Enzyme is a JavaScript Testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output.
        Jasmine
        Jasmine is a Behavior Driven Development testing framework for JavaScript. It does not rely on browsers, DOM, or any JavaScript framework. Thus it's suited for websites, Node.js projects, or anywhere that JavaScript can run.
        See all alternatives