420dcd76fd
* Don't require `Store` in `Instance` constructor This can be inferred from the `Module` argument. Additionally add a `store` accessor to an `Instance` in case it's needed to instantiate another `Module`. cc #708 * Update more constructors * Fix a doctest * Don't ignore store in `wasm_instance_new` * Run rustfmt
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
use std::rc::Rc;
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use wasmtime::*;
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use wat::parse_str;
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#[test]
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fn test_trap_return() -> Result<(), String> {
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struct HelloCallback;
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impl Callable for HelloCallback {
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fn call(&self, _params: &[Val], _results: &mut [Val]) -> Result<(), Trap> {
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Err(Trap::new("test 123"))
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}
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}
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let store = Store::default();
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let binary = parse_str(
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r#"
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(module
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(func $hello (import "" "hello"))
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(func (export "run") (call $hello))
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)
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"#,
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)
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.map_err(|e| format!("failed to parse WebAssembly text source: {}", e))?;
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let module =
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Module::new(&store, &binary).map_err(|e| format!("failed to compile module: {}", e))?;
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let hello_type = FuncType::new(Box::new([]), Box::new([]));
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let hello_func = Func::new(&store, hello_type, Rc::new(HelloCallback));
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let imports = vec![hello_func.into()];
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let instance = Instance::new(&module, &imports)
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.map_err(|e| format!("failed to instantiate module: {:?}", e))?;
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let run_func = instance.exports()[0]
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.func()
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.expect("expected function export");
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let e = run_func.call(&[]).err().expect("error calling function");
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assert_eq!(e.message(), "test 123");
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Ok(())
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}
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