70 lines
2.1 KiB
Rust
70 lines
2.1 KiB
Rust
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// compile-flags: --edition=2018
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use core::{
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future::Future,
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marker::Send,
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pin::Pin,
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};
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fn non_async_func() {
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println!("non_async_func was covered");
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let b = true;
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if b {
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println!("non_async_func println in block");
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}
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}
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// FIXME(#83985): The auto-generated closure in an async function is failing to include
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// the println!() and `let` assignment lines in the coverage code region(s), as it does in the
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// non-async function above, unless the `println!()` is inside a covered block.
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async fn async_func() {
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println!("async_func was covered");
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let b = true;
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if b {
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println!("async_func println in block");
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}
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}
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// FIXME(#83985): As above, this async function only has the `println!()` macro call, which is not
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// showing coverage, so the entire async closure _appears_ uncovered; but this is not exactly true.
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// It's only certain kinds of lines and/or their context that results in missing coverage.
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async fn async_func_just_println() {
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println!("async_func_just_println was covered");
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}
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fn main() {
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println!("codecovsample::main");
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non_async_func();
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executor::block_on(async_func());
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executor::block_on(async_func_just_println());
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}
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mod executor {
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use core::{
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future::Future,
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pin::Pin,
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task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
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};
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pub fn block_on<F: Future>(mut future: F) -> F::Output {
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let mut future = unsafe { Pin::new_unchecked(&mut future) };
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use std::hint::unreachable_unchecked;
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static VTABLE: RawWakerVTable = RawWakerVTable::new(
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|_| unsafe { unreachable_unchecked() }, // clone
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|_| unsafe { unreachable_unchecked() }, // wake
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|_| unsafe { unreachable_unchecked() }, // wake_by_ref
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|_| (),
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);
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let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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let mut context = Context::from_waker(&waker);
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loop {
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if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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break val;
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}
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}
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}
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}
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