Function sanity

cranelift/interpreter/src/interpreter.rs:574–594

()

    // filetest infrastructure.
    #[test]
    fn sanity() {
        let code = "function %test() -> i8 {
        block0:
            v0 = iconst.i32 1
            v5 = iconst.i32 1
            v1 = iadd v0, v5
            v6 = iconst.i32 44
            v2 = isub v6, v1  ; 44 - 2 == 42
            v4 = iconst.i32 42
            v3 = icmp eq v2, v4
            return v3
        }";

        let func = parse_functions(code).unwrap().into_iter().next().unwrap();
        let mut env = FunctionStore::default();
        env.add(func.name.to_string(), &func);
        let state = InterpreterState::default().with_function_store(env);
        let result = Interpreter::new(state).call_by_name("%test", &[]).unwrap();

        assert_eq!(result, ControlFlow::Return(smallvec![DataValue::I8(1)]));
    }

    // We don't have a way to check for traps with the current filetest infrastructure
    #[test]