src/tools/tidy/src/libcoretest.rs

   1 //! Tidy check to ensure `#[test]` is not used directly inside `libcore`.
   2 //!
   3 //! `#![no_core]` libraries cannot be tested directly due to duplicating lang
   4 //! item. All tests must be written externally in `libcore/tests`.
   5
   6 use std::path::Path;
   7
   8 pub fn check(path: &Path, bad: &mut bool) {
   9     let libcore_path = path.join("libcore");
  10     super::walk(
  11         &libcore_path,
  12         &mut |subpath| t!(subpath.strip_prefix(&libcore_path)).starts_with("tests"),
  13         &mut |entry, contents| {
  14             let subpath = entry.path();
  15             if let Some("rs") = subpath.extension().and_then(|e| e.to_str()) {
  16                 let contents = contents.trim();
  17                 if !contents.starts_with("//") && contents.contains("#[test]") {
  18                     tidy_error!(
  19                         bad,
  20                         "`{}` contains `#[test]`; libcore tests must be placed inside \
  21                         `src/libcore/tests/`",
  22                         subpath.display()
  23                     );
  24                 }
  25             }
  26         },
  27     );
  28 }