tiktok-scripts/tiktok-app/tools/fake-engine.js

/**
 * 假引擎：模拟「长时间运行 + 能被叫停」，**完全不碰 TikTok**。
 *
 * 用途：验证界面侧的运行态交互（状态条、进度、两步停止）。
 * 用真引擎验证这些时，它会把 TikTok 拉到前台，我就没法同时操作界面上的按钮了 ——
 * 而这个假引擎不切应用，界面始终留在前台，正好把 UI 交互测干净。
 *
 * 协议与真引擎完全一致：读 --config/--state/--stop-flag/--run-id，写 run-state.json。
 */

function argOf(argv, key) {
    for (var i = 0; argv && argv[i] !== undefined; i += 1) {
        if (String(argv[i]) === key) { return String(argv[i + 1]); }
    }
    return "";
}

var argv = engines.myEngine().execArgv;
var STATE = argOf(argv, "--state");
var STOP = argOf(argv, "--stop-flag");
var RUN_ID = argOf(argv, "--run-id");

function report(payload) {
    payload.runId = RUN_ID;
    payload.updatedAt = Date.now();
    files.write(STATE, JSON.stringify(payload));
}

report({ status: "running", phase: "假引擎运行中", done: 0, total: 3 });

var began = Date.now();
var tick = 0;
var done = 0;
while (Date.now() - began < 60000) {
    tick += 1;

    /* 每 3 秒推进一格进度：用来验证状态条会跟着引擎上报刷新 */
    if (tick % 10 === 0 && done < 3) {
        done += 1;
        report({ status: "running", phase: "已处理 " + done + "/3", done: done, total: 3 });
    }

    var content = "";
    try {
        if (files.exists(STOP)) {
            content = String(files.read(STOP)).replace(/\s/g, "");
        }
    } catch (e) { }

    if (content !== "" && content === RUN_ID) {
        report({ status: "stopped", phase: "", message: "已停止（假引擎）" });
        exit();
    }
    sleep(300);
}

report({ status: "finished", phase: "", done: 3, total: 3, message: "跑完了（假引擎）" });