Enzyme vs Jest
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A JavaScript testing utility that lets you inspect and simulate React component output in tests.
Open source · MIT
A JavaScript testing framework that runs test files and checks results, with a watch mode and snapshots.
The short answer
Choose Enzyme if you need…
- Developers maintaining React codebases that already have component tests
- Teams testing React 16 or older versions with a matching official adapter
- Developers who want shallow rendering to test one component in isolation
- Projects that use Mocha, Chai, Jest, or another test runner of their choice
Choose Jest if you need…
- JavaScript or TypeScript developers who want a testing setup that works with little configuration
- Teams adding automated tests to an existing Node-based or front-end project
- People who want to check how large objects or outputs change over time with snapshots
- Developers who want fast feedback while editing code via watch mode
Side-by-side
| Enzyme | Jest | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 19.8k | 45.5k |
| Setup difficulty | Intermediate | Beginner |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | JavaScript | TypeScript |
| Last code update | 13 months ago | 4 days ago |
What each one is
Enzyme
Enzyme is a JavaScript testing utility for React. It lets developers check what a React component renders, find elements inside it, and simulate actions like clicks, with an API modeled on jQuery's traversal style. It is used alongside a test runner and assertion library such as Mocha, Chai, or Jest.
Jest
Jest is a testing tool for JavaScript code. You write small test files that call functions and check the results against expected values, and Jest runs them and reports which pass or fail. Its watch mode re-runs only the tests related to files you changed, and its snapshot feature saves a copy of large outputs so you can see when they change.
Best for
Enzyme
- Developers maintaining React codebases that already have component tests
- Teams testing React 16 or older versions with a matching official adapter
- Developers who want shallow rendering to test one component in isolation
- Projects that use Mocha, Chai, Jest, or another test runner of their choice
Jest
- JavaScript or TypeScript developers who want a testing setup that works with little configuration
- Teams adding automated tests to an existing Node-based or front-end project
- People who want to check how large objects or outputs change over time with snapshots
- Developers who want fast feedback while editing code via watch mode
Strengths
Enzyme
- Simple, readable API inspired by jQuery for finding and traversing rendered output
- Works with any test runner or assertion library, according to the README
- Supports shallow, full DOM, and static rendering modes in one library
Jest
- The README describes it as working out of the box for most JavaScript projects
- Watch mode runs only tests related to changed files, giving quick feedback
- Snapshot testing and a generated basic configuration file reduce setup effort
Not ideal for
Enzyme
- Projects on React versions not covered by an adapter in the README, since compatibility is limited to the listed adapter versions
- People writing new React tests who want a current, actively documented approach; the README points to migration from Enzyme 2.x and does not describe a newer React testing path
- Hooks-heavy code using shallow rendering, because the README notes useEffect and useLayoutEffect are not called and useCallback does not memoize in shallow mode
Jest
- People who do not write or maintain JavaScript code, since it is a developer tool for testing code
- Projects that need full browser end-to-end testing, because the README describes Jest as a unit-style test runner and does not mention browser automation
- Anyone who wants Babel-free TypeScript type checking in tests, since the README says Babel-based TypeScript support does not type-check tests and suggests ts-jest or tsc instead
Trade-offs
Enzyme
- Requires a separate adapter package matched to your React version, adding setup steps
- Shallow rendering has known gaps with React hooks as described in the README
- The README has a truncated section and gives limited detail on current maintenance status, so the project's future support is unclear from this text
Jest
- TypeScript support through Babel does not type-check tests, so extra tools are needed for that
- The README says Vite support is not full and points to a third-party plugin with limitations
- Setup for some bundlers and TypeScript requires extra packages and configuration
Getting started
Enzyme
Install enzyme and the React 16 adapter as dev dependencies
npm i --save-dev enzyme enzyme-adapter-react-16Jest
Install with npm (dev dependency)
npm install --save-dev jestInstall with yarn (dev dependency)
yarn add --dev jestFrequently asked questions
What is the difference between Enzyme and Jest?
Enzyme: A JavaScript testing utility that lets you inspect and simulate React component output in tests. Jest: A JavaScript testing framework that runs test files and checks results, with a watch mode and snapshots. Enzyme suits developers maintaining react codebases that already have component tests, while Jest suits javascript or typescript developers who want a testing setup that works with little configuration.
Are Enzyme and Jest free?
Enzyme: Free and open source. Jest: Free and open source.
Which is easier to set up, Enzyme or Jest?
Jest is easier to get started with (rated beginner); Enzyme is rated intermediate and usually needs more setup.
Is Enzyme or Jest more popular?
Jest has more GitHub stars (45.5k) than Enzyme (19.8k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Enzyme and Jest?
Other options people compare them with include React Testing Library, Mocha, pytest, react-virtualized, Material UI.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.