From e9d04c5e2444526ffde83662f2d57fa35c772891 Mon Sep 17 00:00:00 2001 From: Zalathar Date: Wed, 1 Nov 2023 21:26:53 +1100 Subject: coverage: Migrate `tests/run-coverage` into `tests/coverage` --- tests/coverage/coroutine.rs | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 tests/coverage/coroutine.rs (limited to 'tests/coverage/coroutine.rs') diff --git a/tests/coverage/coroutine.rs b/tests/coverage/coroutine.rs new file mode 100644 index 00000000000..86d19af6f4f --- /dev/null +++ b/tests/coverage/coroutine.rs @@ -0,0 +1,30 @@ +#![feature(coroutines, coroutine_trait)] + +use std::ops::{Coroutine, CoroutineState}; +use std::pin::Pin; + +// The following implementation of a function called from a `yield` statement +// (apparently requiring the Result and the `String` type or constructor) +// creates conditions where the `coroutine::StateTransform` MIR transform will +// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic +// to handle this condition, and still report dead block coverage. +fn get_u32(val: bool) -> Result { + if val { Ok(1) } else { Err(String::from("some error")) } +} + +fn main() { + let is_true = std::env::args().len() == 1; + let mut coroutine = || { + yield get_u32(is_true); + return "foo"; + }; + + match Pin::new(&mut coroutine).resume(()) { + CoroutineState::Yielded(Ok(1)) => {} + _ => panic!("unexpected return from resume"), + } + match Pin::new(&mut coroutine).resume(()) { + CoroutineState::Complete("foo") => {} + _ => panic!("unexpected return from resume"), + } +} -- cgit 1.4.1-3-g733a5