functionalscript/types/map/test.f.js

FunctionalScript is a purely functional subset of JavaScript

import { mapSet, mapDelete } from "./module.f.js";
export default {
    set: () => {
        const map = mapSet(new Map(), 'a', 'b');
        if (map.get('a') !== 'b') {
            throw 'error';
        }
        if (map.size !== 1) {
            throw 'error';
        }
    },
    delete: () => {
        const map = mapDelete(mapSet(new Map(), 'a', 'b'), 'a');
        if (map.get('a') !== undefined) {
            throw 'error';
        }
        if (map.size !== 0) {
            throw 'error';
        }
    }
};