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cucumber

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cucumber

The official JavaScript implementation of Cucumber.


Version published
Weekly downloads
354K
decreased by-6.21%
Maintainers
6
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Created

What is cucumber?

Cucumber is a tool for running automated tests written in plain language. It allows you to write tests that anyone can understand, regardless of their technical knowledge. Cucumber supports Behavior Driven Development (BDD) and is used to bridge the communication gap between stakeholders and developers.

What are cucumber's main functionalities?

Writing Features in Gherkin

Cucumber uses Gherkin syntax to define test scenarios in plain language. This makes it easy for non-technical stakeholders to understand and contribute to the test cases.

Feature: User login
  Scenario: Successful login
    Given the user is on the login page
    When the user enters valid credentials
    Then the user should be redirected to the dashboard

Step Definitions

Step definitions are the actual code implementations of the steps defined in Gherkin. They link the plain language steps to executable code.

const { Given, When, Then } = require('@cucumber/cucumber');

Given('the user is on the login page', function () {
  // code to navigate to login page
});

When('the user enters valid credentials', function () {
  // code to enter credentials
});

Then('the user should be redirected to the dashboard', function () {
  // code to check redirection
});

Hooks

Hooks allow you to run code before and after each scenario. This is useful for setting up and tearing down test environments.

const { Before, After } = require('@cucumber/cucumber');

Before(function () {
  // code to run before each scenario
});

After(function () {
  // code to run after each scenario
});

Data Tables

Data tables allow you to run the same scenario with multiple sets of data. This is useful for testing different input combinations.

Feature: User login
  Scenario Outline: Successful login with multiple users
    Given the user is on the login page
    When the user enters <username> and <password>
    Then the user should be redirected to the dashboard

    Examples:
      | username | password |
      | user1    | pass1    |
      | user2    | pass2    |

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Package last updated on 20 Apr 2022

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