Hello! I'm a Rust newbie and I'm trying to set up a simple test and benchmark for each of my modules but I can't seem to get it to work. I've tried all sorts of stuff, and eventually just tried to replicate the example given on this page:
// main.rs:
mod add_two;
use add_two::add_two;
fn main() {
println!("add_two(3): {}", add_two(3));
}
// add_two.rs:
pub fn add_two(a: i32) -> i32 {
a + 2
}
#![feature(test)]
extern crate test;
#[cfg(test)]
mod tests {
use super::*;
use test::Bencher;
#[test]
fn it_works() {
assert_eq!(4, add_two(2));
}
#[bench]
fn bench_add_two(b: &mut Bencher) {
b.iter(|| add_two(2));
}
}
When I run cargo +nightly test it gives me a lot of errors:
error: an inner attribute is not permitted in this context
--> src/add_two.rs:5:1
|
5 | #![feature(test)]
| ^^^^^^^^^^^^^^^^^
|
= note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files. Outer attributes, like `#[test]`, annotate the item following them.
error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
--> src/add_two.rs:19:7
|
19 | #[bench]
| ^^^^^
|
= note: `#[deny(soft_unstable)]` on by default
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
error[E0658]: use of unstable library feature 'test'
--> src/add_two.rs:7:1
|
7 | extern crate test;
...........
I must be missing something here - can someone help me out? Thank you!
