Head-to-Head: Cucumber.js vs Mocha Analysis


v9.5.1(28 days ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 40Monthly npm downloads

@cucumber/cucumber is a popular npm package used for behavior-driven development (BDD) testing with Cucumber. It provides a way for developers to write and execute tests in plain language that is easily understood by both technical and non-technical team members.

Alternatives: Jest, Mocha, Protractor

Tags: npmtestingcucumberbddcollaboration


v10.2.0(10 months ago)

This package is actively maintained.Types definitions are provided via a separate npm package: @types/mochaNumber of direct dependencies: 21Monthly npm downloads

Mocha is a feature-rich JavaScript testing framework that runs on both Node.js and in the browser. It provides a wide range of testing options, allowing you to choose from a variety of testing styles, including BDD (Behavior-driven development), TDD (Test-driven development), and more. Mocha is highly configurable with many plugins and libraries, making it suitable for small to large-scale projects.

Alternatives: jest, jasmine, ava

Tags: javascripttestingframeworkbddtdd



Mocha is one of the most popular testing frameworks for JavaScript and has been widely adopted over the years. It has a large community and a significant number of plugins and integrations available. On the other hand, @cucumber/cucumber, which is a Cucumber implementation specifically for JavaScript, is gaining popularity, especially in the context of behavior-driven development (BDD). While not as widely used as Mocha, it has a dedicated following and is gaining traction in the testing community.

Testing Style

Mocha is a general-purpose testing framework and provides a wide range of features for writing both synchronous and asynchronous tests using various testing styles (such as TDD, BDD, and more). @cucumber/cucumber, on the other hand, is specifically designed for behavior-driven development and follows a Given-When-Then syntax to define test scenarios in a more human-readable format.


Mocha uses JavaScript functions to define test suites and test cases, along with various assertion libraries like Chai or should.js to make assertions. @cucumber/cucumber, on the other hand, uses Gherkin syntax, which is a plain-text format that allows non-technical stakeholders to participate in the testing process by writing feature files using Given-When-Then statements.

Integration Testing

Mocha is more commonly used for unit testing and integration testing within the JavaScript ecosystem. It provides flexibility in setting up test environments and running tests in various contexts. @cucumber/cucumber, with its BDD focus, is more suitable for writing high-level integration tests that can be understood by both technical and non-technical stakeholders. It encourages collaboration between developers, testers, and domain experts.

Community and Ecosystem

Mocha has a large and mature ecosystem with a wide range of plugins, report generators, and test runners available. It is widely integrated with other tools and frameworks. @cucumber/cucumber, being a more specialized tool, has a smaller ecosystem, but it is growing. It integrates well with frameworks like Protractor for end-to-end testing and offers plugins for generating test reports.

Development Experience

Both Mocha and @cucumber/cucumber provide good developer experiences. Mocha has a flexible and extensible API, allowing developers to structure tests according to their needs. @cucumber/cucumber's Gherkin syntax offers a more readable and comprehensible way of defining tests, especially for non-technical stakeholders. However, there can be a learning curve associated with @cucumber/cucumber's BDD approach.