A proc macro for making test cases from a corpus of files, intended for parsing-related tests.

```rust

[filetest::filetest("examples/files/*")]

fn testfile(path: &std::path::Path, bytes: &[u8], text: &str) { asserteq!(std::fs::read(path).unwrap(), bytes); asserteq!(bytes, text.asbytes()); } ```

The function can have any combination of the three arguments shown above[^footnote]: note that they are identified by name, not by type.

This macro requires the proc_macro_span unstable feature, in order to support relative paths.