Property-based testing is not just a buzzword in this repo; it has caught real bugs in core monitor logic that traditional example-based tests missed.
This post walks through how we introduced fast-check, where we wired it
in, and specific bug classes it exposed in Uptime Watcher.
Uptime Watcher started as a pragmatic way to watch a handful of URLs from a local machine. By the time we reached v19.0.0, it had grown into a heavily-tested, architecture-driven Electron app with a full documentation and tooling ecosystem around it.
This post walks through that journey using real commits from the git history, focusing on three themes:
All examples and commit references are taken from the main branch as of 2025-11-25.