leandrosilva / testaun

Very minimalist procedural macro to help with tests

Testaun

Very minimalist procedural macro to help with tests, when you have to run some piece of code right before and after the actual test. You know, some sort of setup and teardown kind of thing.

I wrote it with educational purpose as I'm exploring Rust's procedural macros feature. But to be honest it kinda works and I even got to use it on Moy Sekret. Let's see.

How To

As usual, add the dependency to Cargo.toml:

    [dependencies]
    testaun = "0.1.0"

Once you have done that, it is pretty straightforward and there is a standalone test that shows it plain and simple.

    // Import the damn crate
    //

    extern crate testaun;
    use testaun::testaun_case;

    // Those functions are mandatory to be able to use #[testaun]. You'll see an
    // error if they're not provided in the current scope.
    //

    fn testaun_before() {
        println!("[BEFORE]");
    }

    fn testaun_after() {
        println!("[AFTER]");
    }

    // Try it out just like below in order to see [BEFORE] and [AFTER] printed out:
    // $ cargo test -- --nocapture
    //

    #[test]
    #[testaun_case]
    fn should_work_fine() {
        assert!(1 == 1, "oh damn! it should be the other way around");
    }

    #[test]
    fn should_work_as_normal() {
        assert_eq!(1, 1);
    }

So you can use #[testaun] or not. If you go ahead use it, you must provide two functions testaun_before and testaun_after. And that's it.

What a testaun Joe?

Yeah. Big one, dude.

Copyright

Leandro Silva <[email protected]>