The full code is here:
https://github.com/dmerejkowsky/chuck-norris-webassembly-plugins
Here's what's wrong
There's a get_fact method written in Rust and exported with wasm_bindgen:
#[wasm_bindgen]
pub fn get_fact() -> String {
"Chuck Norris can slam a revolving door".to_string()
}
When I build the wasm file with wasm-pack --target nodejs I can call the get_fact just fine from Javascript:
const assert = require('node:assert/strict');
const ck = require('../pkg/chuck_norris.js');
const actual = ck.get_fact();
assert.ok(actual.includes("Chuck Norris"));
But when trying to write the same test in Python:
from wasmer import engine, Store, Module, Instance
from wasmer_compiler_cranelift import Compiler
rust_wasm = Path / "to" / "chucknorris_bg.wasm"
store = Store(engine.Universal(Compiler))
module = Module(store, rust_wasm.read_bytes())
instance = Instance(module)
get_fact = instance.exports.get_fact
actual = get_fact()
assert "Chuck Norris" in actual
I get :
RuntimeError: Parameters of type [] did not match signature [I32] -> []
Any clues as to why NodeJs and Python disagree on the signature of the get_fact() function ?