in src/main.rs [921:932]
fn create_test_files<'a>(
names_and_contents: impl IntoIterator<Item = &'a (&'a str, &'a str)>,
) -> TempDir {
let dir = TempDir::new("fastmodtest").unwrap();
for (name, contents) in names_and_contents {
let path = dir.path().join(name);
let mut file = File::create(path.clone()).unwrap();
file.write_all(contents.as_bytes()).unwrap();
file.sync_all().unwrap();
}
dir
}