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Jest vs JUnit comparison of testing frameworks
What are the differences between Jest and JUnit?


Programming language




Unit Testing

Unit Testing, Regression Testing

General info

A Unit Testing framework focused on simplicity

This is a Unit test framwork especially designed for the React.JS, Babel, TypeScript, Node, React, Angular and Vue projects. It usually worked with Enzyme(Integration testing)

JUnit is an open source Unit testing framework for java

JUnit is useful for developers to write and run repeatable tests. JUnit has been crucial in the development of test driven development and is partof the xUnit family of unit testing frameworks
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.



It is an instance of the xUnit architecture for unit testing frameworks.
Allows testing code execution on the client, such as a web browser


You can easily test methods, properties, UI element actions and other front-end functionalities


You can test front-end components such as individual classes and functions that create the front-end
Allows testing the bahovior of a server-side code


Back-end server behaviour also can be tested with Jest much in the same way as the front-end tests.


You can test classes and functions that compose the back-end such as database connections and so on
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test


Fixtures are supported, Jest has many helper functions such as: BeforeEach and afterEach If you have some work you need to do repeatedly for many tests, beforeAll and afterAll if you only need to do setup once, at the beginning of a file.


JUnit contains a setUp() method, which runs before every test invocation and a tearDown() method, which runs after every test method.
Group fixtures
Allows defining a fixed, specific states of data for a group of tests (group-fixtures). This ensures specific environment for a given group of tests.


Jest supports group fixtures


You can use setUp() and tearDown() inbuilt functions as group fixtures.
Supports data generators for tests. Data generators generate input data for test. The test is then run for each input data produced in this way.


You can use JUnit-quickcheck to generate test data
Licence type governing the use and redistribution of the software

MIT License

Mocks are objects that simulate the behavior of real objects. Using mocks allows testing some part of the code in isolation (with other parts mocked when needed)

Jest uses a custom resolver for imports in your tests making it simple to mock any object outside of your test’s scope. You can use mocked imports with the rich Mock Functions API to spy on function calls with readable test syntax.

JUnit does not support mocking internally but you can use a mock framework like Mockito to generate mock objects.
Allows organizing tests in groups


You can declare as many test suites as you want. Grouping of tests together is done using a describe block


In JUnit you can create a test suite that bundles a few unit test cases and runs them together. You use both @RunWith and @Suite annotation are used to run the suite test.
Other useful information about the testing framework