ISSUES issues that happened while developing this project (some of them may be fixed); not issues from github or other platforms --featues flag cannot parse multiple items, only one rust-lang/cargo#4882 cargo test does actually test src/bin/.. for compile errors, why ? adding multiple subfolders inside tests folder https://doc.rust-lang.org/cargo/reference/cargo-targets.html#configuring-a-target https://doc.rust-lang.org/cargo/guide/project-layout.html