jest-jasmine2

What is jest-jasmine2?

The jest-jasmine2 package is a test runner for Jest that uses Jasmine 2 as its underlying test framework. It allows you to write and run tests using Jasmine's syntax and features within the Jest testing environment.

What are jest-jasmine2's main functionalities?

Basic Test Suite

This feature allows you to define a basic test suite using Jasmine's `describe` and `it` functions. The code sample demonstrates a simple test that always passes.

describe('Basic Test Suite', () => {
  it('should pass a basic test', () => {
    expect(true).toBe(true);
  });
});

Setup and Teardown

This feature allows you to run setup and teardown code before and after each test using `beforeEach` and `afterEach` functions. The code sample demonstrates how to use these functions.

describe('Setup and Teardown', () => {
  beforeEach(() => {
    // Code to run before each test
  });

  afterEach(() => {
    // Code to run after each test
  });

  it('should run setup and teardown', () => {
    expect(true).toBe(true);
  });
});

Matchers

This feature allows you to use various matchers to assert conditions in your tests. The code sample demonstrates the use of `toBe`, `toContain`, and `toEqual` matchers.

describe('Matchers', () => {
  it('should use matchers', () => {
    expect(1 + 1).toBe(2);
    expect([1, 2, 3]).toContain(2);
    expect({a: 1, b: 2}).toEqual({a: 1, b: 2});
  });
});

Other packages similar to jest-jasmine2

mocha

Mocha is a feature-rich JavaScript test framework running on Node.js and in the browser, making asynchronous testing simple and fun. It provides a similar test structure with `describe` and `it` functions but does not include built-in matchers like Jasmine.

chai

Chai is a BDD / TDD assertion library for Node.js and the browser that can be paired with any JavaScript testing framework. It provides a wide range of matchers and can be used with Mocha to achieve similar functionality to jest-jasmine2.

jest

Jest is a delightful JavaScript Testing Framework with a focus on simplicity. It comes with its own test runner and assertion library, but it can also be configured to use Jasmine as the underlying test framework, similar to jest-jasmine2.

README

The README file is missing

Changelog

29.7.0

Features

• [create-jest] Add npm init / yarn create initialiser for Jest projects (#14465)
• [jest-validate] Allow deprecation warnings for unknown options (#14499)

Fixes

• [jest-resolver] Replace unmatched capture groups in moduleNameMapper with empty string instead of undefined (#14507)
• [jest-snapshot] Allow for strings as well as template literals in inline snapshots (#14465)
• [@jest/test-sequencer] Calculate test runtime if perStats.duration is missing (#14473)

Performance

• [@jest/create-cache-key-function] Cache access of NODE_ENV and BABEL_ENV (#14455)

Chore & Maintenance

• [jest-cli] Move internal config initialisation logic to the create-jest package (#14465)