npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

jest-cucumber-extra

v1.1.6

Published

Execute Gherkin scenarios in Jest with extra functionality

Downloads

7

Readme

Jest Cucumber Extra

Execute Gherkin scenarios in Jest with extra functionality

Overview

jest-cucumber-extra is an alternative to Cucumber.js that is forked from jest-cucumber and runs on top on Jest. Instead of using describe and it blocks, you instead write a Jest test for each scenario, and then define Given, When, and Then step definitions inside of your Jest tests. jest-cucumber-extra then allows you to link these Jest tests to your feature files and ensure that they always stay in sync.

Motivation

Jest is an excellent test runner with great features like parallel test execution, mocking, snapshots, code coverage, etc. If you're using VS Code, there's also a terrific Jest extension that allows you get realtime feedback as you're writing your tests and easily debug failing tests individually. Cucumber is a popular tool for doing Acceptance Test-Driven Development and creating business-readable executable specifications. This library aims to achieve the best of both worlds, and even run your unit tests and acceptance tests in the same test runner.

Getting Started

Install Jest Cucumber Extra:

npm install jest-cucumber-extra --save-dev

Add a Feature file:

Feature: Earth shape

  Background:
    Given properties:
      | earthShape   | unknown |
      | realityState | real    |
      And property "galaxy" is "Milky Way"

  Scenario: Round earth
    Given I am normal
    When I talk
    Then result "earthShape" should be "round"

Add unit tests that link to your feature file:

import { defineFeature, DefineStepFunction, World, loadFeature, CommonSteps } from '../src';

// Define the feature loaded from feature file
defineFeature(
  loadFeature('./basic-scenarios.feature', {
    tagFilter: 'not @excluded',
  }),
  (test) => {
    // Create "background" steps
    const background = (given: DefineStepFunction) => {
      // Utilize "common" steps for repeatable steps
      CommonSteps.givenProperties(given);
      CommonSteps.givenPropertyString(given);
    };

    // Create test block for each scenario
    test('Round earth', ({ given, when, then }) => {
      // Create steps that match the feature file
      background(given);

      given('I am normal', (world: World) => {
        // Utilize the world object to reference
        // data from step to step
        world.setGivenProp('earthShape', 'round');
      });

      when('I talk', (world: World) => {
        world.setResultProp('earthShape', world.getGiven().earthShape);
      });

      CommonSteps.thenResultPropertyStringShouldBe(then);
    });

Additional Documentation