@types/jasmine

What is @types/jasmine?

The @types/jasmine npm package provides TypeScript type definitions for Jasmine, a behavior-driven development framework for testing JavaScript code. It does not contain the actual Jasmine framework but includes type declarations that allow TypeScript developers to use Jasmine with type checking and IntelliSense support in their IDEs.

What are @types/jasmine's main functionalities?

Describing test suites

This feature allows you to group together related tests into a test suite. Each suite starts with a call to the global Jasmine function `describe` with two parameters: a string and a function. The string is the title of the test suite, and the function is the block of code that implements the suite.

describe('A suite', () => {
  it('contains spec with an expectation', () => {
    expect(true).toBe(true);
  });
});

Writing test specifications

This feature is used to write individual test cases or specifications. The `it` function takes a string describing the test and a function that contains the test's code. The `expect` function is used to make an assertion about the expected outcome of the test.

it('is true', () => {
  expect(true).toBe(true);
});

Setting up and tearing down

This feature allows you to define setup (`beforeEach`) and teardown (`afterEach`) methods that are called before and after each test spec in a suite, respectively. This is useful for creating a clean environment for each test to run in.

describe('A suite', () => {
  beforeEach(() => {
    // Setup code here
  });

  afterEach(() => {
    // Teardown code here
  });

  it('test case', () => {
    // Test code here
  });
});

Asynchronous support

This feature allows you to test asynchronous code. You can pass a `done` callback to the `it` function and call it when your asynchronous code has completed. This signals to Jasmine that the test should wait for the asynchronous code to finish before considering the test complete.

it('async test', (done) => {
  setTimeout(() => {
    expect(true).toBe(true);
    done();
  }, 1000);
});

Other packages similar to @types/jasmine

@types/mocha

Provides TypeScript definitions for Mocha, another popular testing framework. Like @types/jasmine, it allows TypeScript users to have type checking and IntelliSense for Mocha tests. Mocha is often considered more flexible than Jasmine, as it allows for different assertion libraries and has a simpler interface.

@types/jest

Offers TypeScript definitions for Jest, a testing platform that includes a test runner, assertion library, and mocking support. Jest is often used for React applications and provides a more integrated solution compared to Jasmine, which requires additional libraries for mocking and assertions.

@types/chai

Chai is an assertion library that can be paired with any JavaScript testing framework. The @types/chai package provides TypeScript definitions for Chai, allowing developers to use Chai's fluent API with the benefits of type safety. Unlike @types/jasmine, which is specific to the Jasmine framework, @types/chai can be used with multiple frameworks.

README

Installation

npm install --save @types/jasmine

Summary

This package contains type definitions for Jasmine (https://jasmine.github.io/).

Details

Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/jasmine/v2.

Additional Details

• Last updated: Fri, 15 Sep 2023 20:36:37 GMT
• Dependencies: none
• Global values: afterAll, afterEach, beforeAll, beforeEach, describe, expect, fail, fdescribe, fit, it, jasmine, pending, runs, spyOn, spyOnProperty, waits, waitsFor, xdescribe, xit

Credits

These definitions were written by Boris Yankov, Theodore Brown, David Pärsson, Gabe Moothart, Lukas Zech, Boris Breuer, Chris Yungmann, Yaroslav Admin, and Domas Trijonis.