You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: functions.rs
    path of file: ./repos/solang/tests/polkadot_tests
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: Apache-2.0

use parity_scale_codec::{Decode, Encode};

use crate::{build_solidity, build_wasm, load_abi};

#[test]
fn constructors() {
    #[derive(Debug, PartialEq,
    
fn positional_argument_call() {
    let mut runtime = build_solidity(
        "
        contract foobar {
            function foo1(bool x) public returns (int32 a) {
                return 2;
            }

            function foo1(uint32 x) public returns (int32 a) {
                return 1;
            }

            function test() public {
                assert(foo1(true) == 2);
                assert(foo1(102) == 1);
            }
        }",
    );

    runtime.function("test", Vec::new());
}