Show HN: Dánwò – Open-source E2E testing with emulators and fault injection

Category: devtools

Tags: e2e-testing, fault-injection, emulators, testing-framework, typescript

Score: 7.5/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 7)

Dánwò is a TypeScript-based end-to-end testing framework for web and mobile apps that combines UI testing (via locators or cached plain-English agent steps) with backend emulation of third-party providers (Stripe, Clerk, Resend, etc.) and a fault matrix for verifying invariants under injected failures. Its novel backend-aware testing and recording/replay agent steps address a real gap in E2E tooling, and it integrates with Playwright, Cypress, Detox, and CI/coding agents.

Target audience: frontend and backend developers, QA engineers, devops engineers, mobile developers

Repository: https://github.com/carbonmeai/danwo · TypeScript · Apache-2.0 · 15 stars

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