Fails to run `cargo test` with existance of a `src/main.rs`

[oshaughnessya]

Cargo Version: v1.78.0-nightly and 1.76.0-stable

probe-rs 0.22.0 git commit: 0f2eeb29

Reproducibility: Using the embedded-test-example repository on the stm32f4 branch, add a main.rs, I am using

#![deny(unsafe_code)]
#![no_main]
#![no_std]

use cortex_m_rt::entry;
use stm32f4xx_hal::{
    pac,
    prelude::*,
};

#[allow(clippy::empty_loop)]
#[entry]
fn main() -> ! {
    loop {}
}

after src/main.rs exists, run cargo test. You should get an error saying

error[E0463]: can't find crate for `test`

Full output of cargo test is here.

[t-moe]

Hmm, Apparently cargo test wants to also test the binaries... This is new to me, but is has probably been there for a while.

Adding the following to Cargo.toml helps as a workaround.

[[bin]]
name = "embedded-example-test"
path = "src/main.rs"
test = false

For me, running cargo test hardly makes sense anyways, because I usually have unit tests that will only compile for x86 and integrations test that will only compile for the target. So I prefer to run cargo test --lib and cargo test --tests with the respective --target <...>

I'll keep this task open, until I've added this info to the README and/or changed the example

[t-moe]

Closing this, as this is now updated in the example repo and also added to the FAQ in the wiki