functionalscript/io/virtual/module.f.js

FunctionalScript is a purely functional subset of JavaScript

import { at } from "../../types/ordered_map/module.f.js";
export const createVirtualIo = (files) => ({
    console: {
        log: (..._d) => { },
        error: (..._d) => { }
    },
    fs: {
        writeFileSync: (_file, _data) => { },
        readFileSync: (path, _options) => { return at(path)(files); },
        existsSync: (path) => { return at(path)(files) !== null; },
        promises: {
            readdir: (_path) => Promise.resolve([]),
            readFile: (_path, _options) => Promise.resolve(''),
            writeFile: (_path, _data, _options) => Promise.resolve(),
            rm: (_path, _options) => Promise.resolve(),
            mkdir: (_path, _options) => Promise.resolve(undefined),
            copyFile: (_src, _dest) => Promise.resolve(),
        }
    },
    process: {
        argv: [],
        env: {},
        exit: n => { throw n; },
        cwd: () => '',
    },
    asyncImport: () => Promise.reject(),
    performance: {
        now: () => 0,
    },
    fetch: () => Promise.reject(),
    tryCatch: f => ['ok', f()],
    asyncTryCatch: async (f) => ['ok', await f()],
});