Integration test for function named fn read() fails · wit-bindgen

I've setup an integration test to test a function called fn read(). The code compiles with no warnings with cargo component build, but when I run cargo test it panics with below message. The test run through fine if I for instance rename the function to fn readf(). I don't encounter the same issue with fn read() when having a "regular" lib project without wit-bindgen. I'm not sure if the issues are related to wit-bindgen or if there are certain words that can't be used as function names.

cargo test
   Compiling read_test v0.1.0 (/home/user/projects/read_test)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
     Running unittests src/lib.rs (target/debug/deps/read_test-95b95b2d2f708962)
thread 'main' panicked at src/lib.rs:8:9:
attempt to add with overflow
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at core/src/panicking.rs:221:5:
panic in a function that cannot unwind
stack backtrace:
panicked at std/src/io/mod.rs:429:49:

thread panicked while processing panic. aborting.
error: test failed, to rerun pass `--lib`

Caused by:
  process didn't exit successfully: `/home/projects/read_test/target/debug/deps/read_test-95b95b2d2f708962` (signal: 6, SIGABRT: process abort signal)

//structure
read_test/
│
├── src/
│   ├── bindings.rs
│   └── lib.rs
│
├── tests/
│   └── integration_test.rs
│
├── wit/
│   └── world.wit
└── Cargo.toml



//lib.rs
mod bindings;
pub use bindings::Guest;

pub struct ReadTest;

impl Guest for ReadTest {
    fn read(left: u64, right: u64) -> u64 {
        left + right
    }
}

bindings::export!(ReadTest with_types_in bindings);

//world.wit
package wasm:test;

world read-test {
    export read: func(letf: u64, right: u64) -> u64;
}

//integration_test.rs
use read_test::{Guest, ReadTest};

#[test]
fn test_add() {
    let result = ReadTest::read(2, 2);

    assert_eq!(4, result);
}

//Cargo.toml
[package]
name = "read_test"
version = "0.1.0"
edition = "2021"

[dependencies]
wit-bindgen = { version = "0.24.0", default-features = false, features = [
    "realloc",
] }
wit-bindgen-rt = "0.24.0"
wit-cli = "0.0.0"

[lib]
crate-type = ["cdylib", "rlib"]

[package.metadata.component]
package = "wasm:test"

[package.metadata.component.dependencies]
´´´

Christof Petig (Nov 28 2024 at 08:15):

My guess is that cargo test compiles and runs on native, so you would need a cargo component test (if that exists) or pass a wasm target and run it manually with a runtime.

Stream: wit-bindgen

Topic: Integration test for function named fn read() fails

Utilize3214 (Nov 27 2024 at 21:00):

Christof Petig (Nov 28 2024 at 08:15):