# Audun Halland - Rust 2020: Testing (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article3.5c705a01b476.png) ## Highlights - use the crate [mockall](https://github.com/asomers/mockall) to autogenerate a mocked implementation that I instantiate in my test. - But it turns out you can still do this, using the nightly compiler! Enter [Mocktopus,](https://github.com/CodeSandwich/Mocktopus) a module-level mocking library.