Custom Test Runner Framework

advanced

A test runner framework with test discovery, parallel execution, snapshot testing, coverage reporting, and watch mode. Supports custom assertions, test hooks, and produces detailed failure reports ...

Target user

Library authors who need a custom test framework

Problem

Library authors sometimes need a lightweight custom test runner with specific features not available in mainstream frameworks, without the overhead of large dependencies.

Requirements

Discover and run test files automatically
Parallel test execution with workers
Snapshot testing support
Code coverage reporting
Watch mode for development

Core technologies

TypeScript, Worker Threads, V8

Completion criteria

Users can discover, run tests in parallel, use snapshots, generate coverage, and watch for changes.

Optional extensions

Add browser testing support
Implement test sharding
Add custom reporters
Support test prioritization