Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (2024)

Build, test, and debug directly in your browser with a seamless developer experience that is loved by developers all around the world. Test your code, not your patience.

End-to-end TestingComponent Testing

Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (1)

Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (2)

Delightful Experience

Write your first passing test in minutes

  • Install Cypress via npm, yarn, or direct download as a standalone application. We recommend installing Cypress as a dev dependency to simplify upgrades and versioning while running in CI workflows.

    ~/Documents/GitHub/design-system

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  • Launching Cypress for the first time, you will be guided through decisions and configuration tasks so you can write your first passing test in minutes. No more configuration hell.

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  • We believe that tests should be simple to write, read, and understand. Writing tests with Cypress is like giving descriptive commands to a real user to execute.

    Authentication.cy.ts

    Button.tsx

    Button.cy.tsx

    • design-system
      • assets
        • cypress
          • e2e
            • Authentication.cy.ts
        • src
          • components
            • Button.cy.tsx
            • Button.tsx
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    • Use Cypress Studio to generate tests as you click and record each interaction with your application. Additionally, you can use our interactive selector playground to generate commands for matching any element.

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    • Out-of-the-box, Cypress includes everything needed to set up your test suite. Spend less time managing drivers and dependencies, and spend more time delivering quality code.

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (3)

      An all-in-one testing framework and assertion library with mocking and stubbing.

      Screenshots & Videos

      Reporters

      Assertion Library

      Javascript Test Framework

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    ~/Documents/GitHub/design-system

    Authentication.cy.ts

    Button.tsx

    Button.cy.tsx

    • design-system
      • assets
        • cypress
          • e2e
            • Authentication.cy.ts
        • src
          • components
            • Button.cy.tsx
            • Button.tsx

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (4)

      An all-in-one testing framework and assertion library with mocking and stubbing.

      Screenshots & Videos

      Reporters

      Assertion Library

      Javascript Test Framework

      Visual Debugging

      Debug failures directly in the browser

      • Time travel to see your application’s behavior during test execution step-by-step. Hover over commands to see which elements Cypress acted upon and how your real app responded using simulated user behavior.

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      • Watch commands execute and your application under test side-by-side and in real time. Tests automatically re-run on file save for an instant feedback loop so that you can drive development with testing.

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      • We go with the flow of the modern ecosystem. Continue using built-in browser tools that you know and love while your tests run. There’s no fidelity loss.

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      • Understand why something failed with automatic DOM snapshots and videos of a full test spec run. This extra visibility makes debugging in headless mode (locally or in continuous integration pipelines) a breeze.

        cy-heroes

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      • Find everything you need in one place. In-App workflows powered by Cloud insights to enable you to locally manage your project health and review, rerun, and debug tests that are recorded to Cypress Cloud.

        cy-heroes

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      cy-heroes

      cy-heroes

      Flake Resistance

      Eliminate flaky tests with ease

      • Never add arbitrary waits or sleeps to your tests. Cypress automatically waits for commands and assertions before moving on. Since commands execute serially, you can write deterministic, predictable tests.

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      • We wrap all DOM queries with robust retry-and-timeout logic. When a test fails, we mimic a real user with built-in wait times and multiple attempts at asserting your tests in order to minimize false negatives / positives.

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      • Cypress reduces flaky test results which are commonly present in other testing frameworks by isolating the state of each test and clearing the state of the browser before the next test runs and ensuring more trustworthy results.

        Auth

        Login as a member role

        Clear page, cookies, sessions and local storage

        Auth

        Login as an admin role

        Clear page, cookies, sessions and local storage

        Auth

        Login as an owner role

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      • Cypress automatically retries failed tests to mitigate flaky tests from failing entire test runs or CI builds. When paired with the Cypress Cloud, you’ll be able to detect, monitor, prioritize, and fix flake issues.

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      • Our architecture doesn’t use Selenium or WebDriver. We built Cypress from the ground up for superior stability. Running in the same run-loop as your app allows us to control the entire automation process from top to bottom.

        #102flaky

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        Owner Role

        #104flaky

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      Auth

      Login as a member role

      Clear page, cookies, sessions and local storage

      Auth

      Login as an admin role

      Clear page, cookies, sessions and local storage

      Auth

      Login as an owner role

      #102flaky

      Auth

      Login

      Owner Role

      #104flaky

      Auth

      Login

      Owner Role

      Loved by OSS, trusted by Enterprise

      Cypress is proud to support developers all around the world by making it easier to build and test modern applications.

      5M+

      Weekly downloads

      45K+

      GitHub stars

      1M+

      Dependent repositories

      Whoa @Cypress_io is just so impressive and writing tests is a surprising delight.

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (6)

      PRADEEP KUMAR VERMA

      @ErpradeepVerma

      Go to tweet

      Check out @Cypress_io for end to end #testing https://cypress.io

      One of the most user-friendly, no-frills and feature-rich automation tools I have worked upon. Kudos to the Cypress team for their commitment and dedication. Keep up the good work!

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (7)

      Stephen Callender

      @sjcallender

      Go to tweet

      Who deploys on Fridays? We do at @fostercommerce. Why? Because @Cypress_io.

      The further I get into my career as a dev, the more I appreciate testing. I like writing tests, I like finding edge cases with them, I like checking my bug fixes by running them, I like watching them live with cypress. It just feels like a good way to learn and feel confident.

      awesome to see how much tooling @Cypress_io is offering developers. Today, I went through the e2e code coverage tutorial and it was as easy as it could be to set it up on a react project https://t.co/J95kPEdnK2

      Seriously, doing component testing with @Cypress_io is such a breath of fresh air. No mocking browser API's, none of that. Want to test out IntersectionObserver? Just load the component and use cypress. That's all.

      .@Cypress_io is an amazing piece of software. It's far and away the funnest and most intuitive testing framework I've ever used.

      I've started using @Cypress_io for testing

      It's insanely useful, not just for testing but as an aid while developing

      Can't believe how much time I've wasted by manually typing in data to test forms

      Here it is, along with a sneak peek of @cloakist's new onboarding flow

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (13)

      Filip Hric 🇸🇰❤️🇺🇦

      @filip_hric

      Go to tweet

      Popularity of @Cypress_io is not a coincidence, the DX is buttery smooth and feels familiar with what FE devs work with already:

      - test code compiles and runs inside browser

      - hot reload tests (re-run on save)

      - debug with browser devtools

      - integrate with CI

      - component testing

      In the world of test automation, #cypress is a beauty. @Cypress_io

      @Cypress_io component testing can flip how you build apps.

      And it's got LITTLE to do with "testing". It allows you to develop from the inside out. This makes focusing while coding SO MUCH EASIER!

      Can't say this loud enough. Give Cypress componnet testing a try!!!

      #Vue #webdev

      @Cypress_io Amazing work on ver 10 and component testing. Just love the way you put emphasis on DX. Well played.

      @Cypress_io super happy with the great Cypress docs. Just getting started with testing and your excellent docs and video tutorials make it so much less intimidating. #FrontEndDeveloper #javascriptframeworks #javascript #unittesting #e2etesting

      Today I’ve installed and configured @Cypress_io component tests for #Angular - including #gitlab ci integration and a bunch of tests - within an hour of my working day 🤯 Cypress docs are on another level 👌🏻

      Smaller apps, building components from the outside in is easier.

      page -> table -> row -> cell

      Larger apps, this sucks and gets confusing! This is why @Cypress_io component testing is great. It makes this easier...

      cell -> row -> table -> page

      Test your code, not your patience

      Install Cypress in seconds on Mac, Linux, or Windows and embrace the future of testing modern applications.

      Documentation

      Installing Cypress

      Check out our comprehensive Docs for details about installing Cypress.

      Learn how to install Cypress

      Learn Cypress

      Add testing skills to your toolbelt with our expert-led courses.

      Visit Cypress Learn

      Integrate with CI

      Cypress integrates with all CI providers to record and optimize your test runs.

      Add Cypress to your CI workflow

      Cypress Cloud

      Supercharge your workflow with test intelligence, visual reviews, and more.

      Explore Cypress Cloud

      Open-Source E2E Testing Tools & UI Testing Framework | cypress.io (2024)

      FAQs

      Is Cypress framework used for E2E testing? ›

      Cypress is a JavaScript-based end-to-end testing framework that provides a simple and intuitive API for testing web applications. Cypress supports modern web development technologies like React, Angular, Vue. js, and more.

      Is Cypress testing open source? ›

      Cypress is a free, downloadable and open source (MIT license) application. This is always free to use. Cypress Cloud is a web application that offers a variety of billing plans (including a free, open source plan) for when you want to record your test runs in CI.

      Can Cypress be used for UI testing? ›

      How to Write End-to-End UI Tests Using Cypress. With Cypress end-to-end testing, you can replicate user behaviour on your application and cross-check whether everything is working as expected. In this section, we'll check useful ways to write E2E tests on the front-end using Cypress.

      Which is better for E2E testing selenium or Cypress? ›

      Although Selenium and Cypress are both designed browser automation to automate browsers for testing purposes, they differ considerably in terms of architecture and performance. Cypress is preferred over Selenium when one need: Single Framework for Component, API, End to End, Visual, Accessibility, Performance testing.

      Should I use selenium or Cypress? ›

      Selenium is more established and has a wider range of capabilities, making it a good choice for large-scale testing projects. Cypress is newer and easier to use, making it a good choice for smaller teams or projects that only require a little cross-browser testing.

      Is Cypress better than selenium? ›

      Cypress provides a unique feature called real-time reloading, which enables developers to see the test results as they code. This makes the debugging process much faster and more efficient. Selenium, on the other hand, does not provide real-time reloading and requires more time to set up and execute tests.

      Does Cypress need coding? ›

      Cypress tests are only written in JavaScript.

      There are no language or driver bindings - there is and will only ever be just JavaScript.

      How much does Cypress tool cost? ›

      Cypress at a glance
      NamePrice
      Free PlanFree
      TeamStarting at $75/month
      BusinessStarting at $300/month
      EnterpriseContact Us
      1 more row
      Jul 14, 2021

      What are the limitations of Cypress? ›

      No multiple tabs or browsers.

      Cypress doesn't support testing scenarios involving multiple tabs or windows. This is deliberate choice by creators, some limitations “prevent you from writing bad, slow, or flaky tests ” [2].

      Is Cypress.io free? ›

      Cypress consists of a free, open source, locally installed application and Cypress Cloud for recording your tests. First: Cypress helps you set up and start writing tests every day while you build your application locally.

      What framework is best for Cypress? ›

      Cypress framework is a JavaScript-based end-to-end testing framework built on Mocha – a feature-rich JavaScript test framework running on and in the browser, making asynchronous testing simple and convenient.

      Why use Cypress for E2E testing? ›

      Cypress gives you a visual structure of suites, tests, and assertions. Soon you'll also see commands, page events, network requests, and more. What are describe, it, and expect ? All of these functions come from Bundled Libraries that Cypress bakes in.

      What to test in E2E Cypress? ›

      E2E Testing is a technique that tests your app from the web browser through to the back end of your application, as well as testing integrations with third-party APIs and services. These types of tests are great at making sure your entire app is functioning as a cohesive whole.

      Is Cypress E2E or integration? ›

      Cypress was originally designed to run end-to-end (E2E) tests on anything that runs in a browser. A typical E2E test visits the application in a browser and performs actions via the UI just like a real user would.

      What type of testing is Cypress used for? ›

      Cypress is an automation web testing tool that's fast, easy, and reliable for testing the things (web components) that run in a browser. It's an open-source test automation framework for testing JavaScript web and enables you to perform unit, integration, and end-to-end tests.

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