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#![allow(non_camel_case_types)]
#![allow(dead_code)]
#[derive(Clone, Debug)]
enum foo {
a(usize),
b(String),
}
fn check_log<T: std::fmt::Debug>(exp: String, v: T) {
assert_eq!(exp, format!("{:?}", v));
}
#[test]
fn log_knows_the_names_of_variants_in_std() {
let mut x = Some(foo::a(22));
let exp = "Some(a(22))".to_string();
let act = format!("{:?}", x);
assert_eq!(act, exp);
check_log(exp, x);
x = None;
let exp = "None".to_string();
let act = format!("{:?}", x);
assert_eq!(act, exp);
check_log(exp, x);
}
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