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http-error-mocker

v1.0.0

Published

Simulate HTTP errors and network conditions for testing purposes

Downloads

14

Readme

HTTP Error Mocker

npm version CI

Mocking HTTP errors and network conditions for testing purposes.

Features

  • Mock server errors (e.g., 500 Internal Server Error)
  • Mock network errors (e.g., network disconnects)
  • Mock timeouts
  • Configure delays to mimic latency
  • Works in both browser and Node.js environments
  • TypeScript support

Installation

npm install http-error-mocker

Usage

Basic Example

import { HttpErrorMocker } from 'http-error-mocker';

const mocker = new HttpErrorMocker();

// Mock a server error for specific endpoints
mocker.mock((url) => url.includes('/api/error'), {
  errorType: 'server-error',
  statusCode: 500,
});

// Start intercepting fetch calls
mocker.start();

// Your code that makes fetch calls
fetch('/api/error')
  .then((response) => {
    console.log(response.status); // 500
  })
  .catch((error) => {
    console.error(error);
  });

// Stop intercepting when done
mocker.stop();

Mock a Network Error

mocker.mock((url) => url.includes('/api/error'), {
  errorType: 'network-error',
});

Mock a Timeout

mocker.mock((url) => url.includes('/api/error'), { errorType: 'timeout' });

Mock a Delay

mocker.mock((url) => url.includes('/api/error'), { delay: 3000 });

Mock a Random Error

mocker.mock((url) => url.includes('/api/error'), { errorType: 'random' });

API

mocker.mock(condition: ErrorCondition, options: MockerOptions): void;

Defines a condition under which to mock an error.

  • condition: A function that receives the URL and options of the fetch call and returns a boolean indicating whether to mock the error.
  • options: Configuration for the type of error to mock.
mocker.start(): void;

Starts intercepting fetch calls.

mocker.stop(): void;

Stops intercepting fetch calls.

mocker.reset(): void;

Resets the mocker to its initial state.

Mocker Options

  • errorType: 'timeout' | 'server-error' | 'network-error'
  • statusCode: number
  • statusText: string
  • delay: number

Polyfill for globalThis

If your environment doesn't support globalThis, the package includes a polyfill. Ensure it's imported before other code.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request or open an issue.

  1. Fork the repository
  2. Create a new branch (git checkout -b feature-branch)
  3. Commit your changes (git commit -am 'Add new feature')
  4. Push to the branch (git push origin feature-branch)
  5. Open a Pull Request

🌟 Support

If you like this project, please give it a ⭐ on GitHub! You can also follow me for more projects.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgements

Thanks to the developers of TypeScript, Jest, and Husky.

Contact

For any inquiries or feedback, please contact Alperen Talaslıoğlu.