CODEWITHSUNDEEP
unit-testingtestingrustintegration-testingteardown
Ivan Gozali
Ivan Gozali

Reputation: 2249

Is there a way to execute a teardown function after all tests have been run?

In Rust, is there any way to execute a teardown function after all tests have been run (i.e. at the end of cargo test) using the standard testing library?

I'm not looking to run a teardown function after each test, as they've been discussed in these related posts:

These discuss ideas to run:

One workaround is a shell script that wraps around the cargo test call, but I'm still curious if the above is possible.

Upvotes: 33

Views: 6563

Answers (2)

Paul Wagener
Paul Wagener

Reputation: 472

Here is an example implementation of the custom test framework solution mentioned by Masklinn:

#![feature(custom_test_frameworks)]
#![feature(test)]
#![test_runner(custom_test_runner)]

extern crate test;

use test::{test_main_static, TestDescAndFn};

fn main() {}

pub fn custom_test_runner(tests: &[&TestDescAndFn]) {
    println!("Setup");
    test_main_static(tests);
    println!("Teardown");
}

#[cfg(test)]
mod tests {

    #[test]
    fn test1() {
        println!("Test 1")
    }

    #[test]
    fn test2() {
        println!("Test 2")
    }
}

This will print:

Setup
Test 1
Test 2
Teardown

Upvotes: 5

Masklinn
Masklinn

Reputation: 42197

I'm not sure there's a way to have a global ("session") teardown with Rust's built-in testing features, previous inquiries seem to have yielded little, aside from "maybe a build script". Third-party testing systems (e.g. shiny or stainless) might have that option though, might be worth looking into their exact capabilities

Alternatively, if nightly is suitable there's a custom test frameworks feature being implemented, which you might be able to use for that purpose.

That aside, you may want to look at macro_rules! to cleanup some boilerplate, that's what folks like burntsushi do e.g. in the regex package.

Upvotes: 3

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