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coverage: Add a test for async blocks

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We have coverage tests that use async functions, but none that use async
blocks.
This commit is contained in:
Zalathar 2023-12-19 22:17:10 +11:00
parent 5810deef69
commit 4ae792036e
3 changed files with 104 additions and 0 deletions
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tests/coverage/async_block.coverage Normal file
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LL| |#![feature(coverage_attribute)]
LL| |#![feature(noop_waker)]
LL| |// edition: 2021
LL| |
LL| 1|fn main() {
LL| 17| for i in 0..16 {
^16
LL| 16| let future = async {
LL| 16| if i >= 12 {
LL| 4| println!("big");
LL| 12| } else {
LL| 12| println!("small");
LL| 12| }
LL| 16| };
LL| 16| executor::block_on(future);
LL| 16| }
LL| 1|}
LL| |
LL| |mod executor {
LL| | use core::future::Future;
LL| | use core::pin::pin;
LL| | use core::task::{Context, Poll, Waker};
LL| |
LL| | #[coverage(off)]
LL| | pub fn block_on<F: Future>(mut future: F) -> F::Output {
LL| | let mut future = pin!(future);
LL| | let waker = Waker::noop();
LL| | let mut context = Context::from_waker(&waker);
LL| |
LL| | loop {
LL| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
LL| | break val;
LL| | }
LL| | }
LL| | }
LL| |}