Show HN: a Rust crate to mock concrete type without using trait

The approach in this crate is you don't change any thing in your production code but directly mock functions such as std, reqwest and etc. // Production code use std::fs; pub fn claim_slot() -> Result<(), String> { fs::create_dir_all("/var/run/dispatcher") . map_err(|error| format!

Source: [Hacker News](https://github.com/XTSoftwareLabs/shimforge)