Nodejs play audio file using available player

AudioPlayer.js

import { spawn } from "child_process";
import { readdirSync } from "fs";
import path from "path";

class AudioPlayer {
    constructor({ player, folder, ext = "wav" }) {
        if (!player || !folder) throw new Error(`Parameters 'player' and 'folder' are required`)
        this.player = player;
        this.folder = path.resolve(folder);
        this.ext = `.${ext}`;
    }

    play = (fileName) => new Promise((resolve, reject) => {
        if (!fileName) return reject(new Error("Parameter file name is required"))
        const fileWithExt = fileName.endsWith(this.ext) ? fileName : `${fileName}${this.ext}`
        const filePath = path.join(this.folder, fileWithExt);
        const proc = spawn(this.player, [filePath], { stdio: "ignore" });
        proc.on('error', reject)
        proc.on("close", (code) => {
            if (code !== 0) {
                const message = `Unable to play audio file: ${code}`
                return reject(new Error(message))
            }
            resolve()
        });
    })
}

let playedAt = 0;
const player = new AudioPlayer({ player: 'aplay', folder: './audios' });
const files = readdirSync(player.folder);

(async function test() {
    try {
        if (playedAt === files.length) return console.log("Done");
        console.log("Playing: ", files[playedAt]);
        await player.play(files[playedAt]);
        ++playedAt;
        test();
    } catch (error) {
        console.error({ error })
    }
})()