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AVA

104
189
+ 1
33
Jest

4.5K
2.6K
+ 1
168
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AVA vs Jest: What are the differences?

AVA: A refined, futuristic test runner. 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; Jest: Painless JavaScript Unit Testing. Jest provides you with multiple layers on top of Jasmine.

AVA and Jest can be primarily classified as "Javascript Testing Framework" tools.

"Simple and fast" is the primary reason why developers consider AVA over the competitors, whereas "Open source" was stated as the key factor in picking Jest.

AVA and Jest are both open source tools. Jest with 26.1K GitHub stars and 3.53K forks on GitHub appears to be more popular than AVA with 16.4K GitHub stars and 1.07K GitHub forks.

According to the StackShare community, Jest has a broader approval, being mentioned in 262 company stacks & 150 developers stacks; compared to AVA, which is listed in 12 company stacks and 10 developer stacks.

Decisions about AVA and Jest
Shared insights
on
JestJestCypressCypress

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 AVA
Pros of Jest
  • 13
    Simple and fast
  • 6
    Parallel test running
  • 5
    Open source
  • 3
    Promise support
  • 3
    Test code Instrumenting
  • 2
    Babel integration
  • 1
    ESM Ready
  • 35
    Open source
  • 31
    Mock by default makes testing much simpler
  • 22
    Testing React Native Apps
  • 19
    Parallel test running
  • 15
    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
  • 6
    One stop shop for unit testing
  • 6
    Promise support
  • 3
    Great documentation
  • 1
    Built in watch option with interactive filtering menu
  • 1
    Preset support
  • 1
    Assert Library Included
  • 0
    Can be used for BDD

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Cons of AVA
Cons of Jest
  • 1
    No built-in support for DOM
  • 1
    No source files compilation
  • 3
    Documentation
  • 3
    Ambiguous configuration
  • 2
    Multiple error messages for same error
  • 2
    Difficult to run single test/describe/file
  • 2
    Ambiguous
  • 2
    Many bugs still not fixed months/years after reporting
  • 2
    Difficult
  • 1
    Bugged
  • 1
    Reporter is too general
  • 1
    BeforeAll timing out makes all passing tests fail
  • 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 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.

What is Jest?

Jest provides you with multiple layers on top of Jasmine.

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What companies use AVA?
What companies use Jest?
See which teams inside your own company are using AVA or Jest.
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What tools integrate with AVA?
What tools integrate with Jest?
    No integrations found

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    Blog Posts

    What are some alternatives to AVA and Jest?
    EVA
    Equipping you with hundreds of symbols and dozens or styles configurations, it makes sure the design stays consistent across all of your applications and platforms.
    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.
    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.
    Chai
    It is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework. It has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a more classical feel.
    Cypress
    Cypress is a front end automated testing application created for the modern web. Cypress is built on a new architecture and runs in the same run-loop as the application being tested. As a result Cypress provides better, faster, and more reliable testing for anything that runs in a browser. Cypress works on any front-end framework or website.
    See all alternatives