dumbfound

Randomized testing infrastructure. This is the main library that provides support for reproducible randomness that is used to implement custom tests for test runners such as Jest and Mocha.

Introduction

Randomized testing is built around the idea that tests should sometimes fail, and that every time a test fails it helps improve the quality of your project. Randomized testing helps with failure by introducing limited randomness into test cases to help find edge cases.

Dumbfound is built around supplying deterministic randomness that can be used by a test case to generate random data. The deterministic aspect helps with making test failures reproducible by providing a seed that can be used to replay the test case.

Using

For most use cases an implementation specific to a test runner should be used, but this library can also be used directly:

const { generateSeed, Randomizer } = require('dumbfound');

// Generate a seed for use with the randomizer
const seed = generateSeed();

// Create a new instance over the given seed
const random = new Randomizer(seed);

console.log('Using seed:', random.seed);
console.log('Generated int:', random.int(100));

API documentation

For now see the main repository for details about the API available in tests.