coverage: Extract `executor::block_on` from several async coverage tests

By moving `block_on` to an auxiliary crate, we avoid having to keep a separate
copy of it in every async test.

(This also incorporates some small tweaks to the headers in `await_ready.rs`.)

1 files changed, 12 insertions, 25 deletions

diff --git a/tests/coverage/await_ready.coverage b/tests/coverage/await_ready.coverage
index 0075f09426e..7ab03e6d3de 100644
--- a/tests/coverage/await_ready.coverage
+++ b/tests/coverage/await_ready.coverage
@@ -1,38 +1,25 @@
    LL|       |#![feature(coverage_attribute)]
-   LL|       |#![feature(custom_inner_attributes)] // for #![rustfmt::skip]
    LL|       |#![feature(noop_waker)]
-   LL|       |#![rustfmt::skip]
+   LL|       |#![coverage(off)]
    LL|       |//@ edition: 2021
    LL|       |
-   LL|       |#[coverage(off)]
-   LL|       |async fn ready() -> u8 { 1 }
+   LL|       |//@ aux-build: executor.rs
+   LL|       |extern crate executor;
    LL|       |
+   LL|       |async fn ready() -> u8 {
+   LL|       |    1
+   LL|       |}
+   LL|       |
+   LL|       |#[coverage(on)]
+   LL|       |#[rustfmt::skip]
    LL|      1|async fn await_ready() -> u8 {
    LL|      1|    // await should be covered even if the function never yields
    LL|      1|    ready()
    LL|      1|        .await
    LL|      1|}
    LL|       |
-   LL|      1|fn main() {
-   LL|      1|    let mut future = Box::pin(await_ready());
-   LL|      1|    executor::block_on(future.as_mut());
-   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 mut context = Context::from_waker(Waker::noop());
-   LL|       |
-   LL|       |        loop {
-   LL|       |            if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
-   LL|       |                break val;
-   LL|       |            }
-   LL|       |        }
-   LL|       |    }
+   LL|       |fn main() {
+   LL|       |    let mut future = Box::pin(await_ready());
+   LL|       |    executor::block_on(future.as_mut());
    LL|       |}