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, 3 insertions, 18 deletions

diff --git a/tests/coverage/async.coverage b/tests/coverage/async.coverage
index 995674257c4..429fb112f33 100644
--- a/tests/coverage/async.coverage
+++ b/tests/coverage/async.coverage
@@ -6,6 +6,9 @@
    LL|       |//@ edition: 2018
    LL|       |//@ compile-flags: -Copt-level=1
    LL|       |
+   LL|       |//@ aux-build: executor.rs
+   LL|       |extern crate executor;
+   LL|       |
    LL|      1|async fn c(x: u8) -> u8 {
    LL|      1|    if x == 8 {
    LL|      1|        1
@@ -100,22 +103,4 @@
    LL|      1|    let _ = m(5);
    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|       |}