@pollyjs/core is a JavaScript testing library that helps developers record, replay, and stub HTTP interactions. It can be integrated with any testing framework and provides a powerful API for testing network requests. With Polly.js, you can simulate scenarios like slow networks and server errors to ensure your application handles them gracefully. It also supports parallel testing and can be used in different environments, including browser testing and command-line tools. Its comprehensive documentation and plugin system make it easy to customize and extend its functionality.
Nock is a powerful and flexible HTTP mocking and expectations library for Node.js. It allows you to simulate HTTP requests and responses in your tests, making it easier to write reliable and deterministic tests for applications that interact with external APIs.
Both @pollyjs/core and nock are popular npm packages for mocking HTTP requests. However, nock has been around for longer and has a larger user base and community support.
Functionality
@pollyjs/core is a powerful and flexible HTTP recording and playback library that allows you to record and replay HTTP requests. It supports various request/response matching strategies and provides advanced features like request modification and response manipulation. nock, on the other hand, focuses on intercepting and mocking HTTP requests, allowing you to define custom responses for specific requests.
Integration
@pollyjs/core is primarily designed for integration with testing frameworks like Jest, Mocha, and Jasmine. It provides a seamless integration experience and offers plugins for different testing frameworks. nock, on the other hand, can be used in both testing and non-testing scenarios and can be integrated into any Node.js application.
Flexibility
@pollyjs/core provides more flexibility in terms of request/response matching and manipulation. It allows you to define complex matching criteria and modify requests and responses on the fly. nock, on the other hand, provides a simpler API for defining request/response mocks but may be less flexible in certain scenarios.
Community Support
Both @pollyjs/core and nock have active communities and receive regular updates. However, nock has been around for longer and has a larger community, which means it may have more resources, examples, and community support available.
Documentation
Both packages have well-documented APIs and provide examples and guides to help developers get started. However, nock's documentation is more extensive and covers a wider range of use cases and scenarios.
