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

23.6.0

Features

• [jest-cli] Add changedSince to allowed watch mode configs (#6955)
• [babel-jest] Add support for babel.config.js added in Babel 7.0.0 (#6911)
• [jest-resolve] Add support for an experimental mapper option (Watchman crawler only) that adds virtual files to the Haste map (#6940)

Fixes

• [jest-resolve] Only resolve realpath once in try-catch (#6925)
• [expect] Fix TypeError in toBeInstanceOf on null or undefined (#6912)
• [jest-jasmine2] Throw a descriptive error if the first argument supplied to a hook was not a function (#6917) and (#6931)
• [jest-circus] Throw a descriptive error if the first argument supplied to a hook was not a function (#6917) and (#6931)
• [expect] Fix variadic custom asymmetric matchers (#6898)
• [jest-cli] Fix incorrect testEnvironmentOptions warning (#6852)
• [jest-each] Prevent done callback being supplied to describe (#6843)
• [jest-config] Better error message for a case when a preset module was found, but no jest-preset.js or jest-preset.json at the root (#6863)
• [jest-haste-map] Catch crawler error when unsuccessfully reading directories (#6761)

Chore & Maintenance

• [docs] Add custom toMatchSnapshot matcher docs (#6837)
• [docs] Improve the documentation regarding preset configuration (#6864)
• [docs] Clarify usage of --projects CLI option (#6872)
• [docs] Correct failure-change notification mode (#6878)
• [scripts] Don’t remove node_modules from subdirectories of presets in e2e tests (#6948)
• [diff-sequences] Double-check number of differences in tests (#6953)