Async test function attribute

[ibraheemdev]

#[futures_test::test]
async fn my_test() {
     let fut = async { true };
     assert!(fut.await);
}

Resolves #1890

[ibraheemdev]

This macro is actually not even testing specific. Maybe it should be called block_on and re-exported from futures_util/futures also?

[taiki-e]

Thanks!

Maybe it should be called block_on and re-exported from futures_util/futures also?

I tend to prefer to provide this attribute as part of futures-test until #2295 is done. (block_on is provided by futures-executor that depend on futures-util, so it is difficult to provide this as part of futures-util.)

[ibraheemdev]

I don't know if there is a reliable way to test if the generate test actually gets run. If the macro regresses and omits the attrs and #[test], this will silently fail.

[taiki-e]

This is good as-is for now.
macrotest is a crate for that use case (example), but it's difficult to use with #[futures_test::test], as it will show other code generated by #[test].

[taiki-e]

LGTM aside from a few nits.

[taiki-e]

Thanks again.