use displaydoc::Display;
#[cfg(feature = "std")]
use std::path::PathBuf;
#[derive(Display)]
struct HappyStruct {
thing: &'static str,
}
#[derive(Display)]
enum Happy {
Variant1,
Variant2,
Variant3 { sometimes: &'static str },
Variant4,
Variant5(u32),
#[cfg(feature = "std")]
Variant6(PathBuf),
}
fn assert_display<T: std::fmt::Display>(input: T, expected: &'static str) {
let out = format!("{}", input);
assert_eq!(expected, out);
}
#[test]
fn does_it_print() {
assert_display(Happy::Variant1, "I really like Variant1");
assert_display(Happy::Variant2, "Variant2 is pretty swell 2");
assert_display(Happy::Variant3 { sometimes: "hi" }, "Variant3 is okay hi");
assert_display(
Happy::Variant4,
"Variant4 wants to have a lot of lines\n\n Lets see how this works out for it",
);
assert_display(Happy::Variant5(2), "Variant5 just has 2 many problems");
assert_display(HappyStruct { thing: "hi" }, "Just a basic struct hi");
}
#[test]
#[cfg(feature = "std")]
fn does_it_print_path() {
assert_display(
Happy::Variant6(PathBuf::from("/var/log/happy")),
"The path /var/log/happy",
);
}