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wasmer/lib/runtime/tests/error_propagation.rs
2019-04-22 15:53:21 -07:00

50 lines
1.2 KiB
Rust

#[test]
fn error_propagation() {
use std::convert::Infallible;
use wabt::wat2wasm;
use wasmer_runtime::{compile, error::RuntimeError, imports, Ctx, Func};
static WAT: &'static str = r#"
(module
(type (;0;) (func))
(import "env" "ret_err" (func $ret_err (type 0)))
(func $call_panic
call $ret_err
)
(export "call_err" (func $call_panic))
)
"#;
#[derive(Debug)]
struct ExitCode {
code: i32,
}
fn ret_err(_ctx: &mut Ctx) -> Result<Infallible, ExitCode> {
Err(ExitCode { code: 42 })
}
let wasm = wat2wasm(WAT).unwrap();
let module = compile(&wasm).unwrap();
let instance = module
.instantiate(&imports! {
"env" => {
"ret_err" => Func::new(ret_err),
},
})
.unwrap();
let foo: Func<(), ()> = instance.func("call_err").unwrap();
let result = foo.call();
if let Err(RuntimeError::Error { data }) = result {
let exit_code = data.downcast::<ExitCode>().unwrap();
assert_eq!(exit_code.code, 42);
} else {
panic!("didn't return RuntimeError::Error")
}
}