微信外卖系统选型：用版本化能力证据检查演示覆盖

原创

微订技术团队

发布于 2026-11-03 09:44:16

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选择微信外卖系统时，采购需求需要有对应版本的演示证据。多商户平台尤其要核对商家隔离、配送和退款对账。下面用一个可运行的能力覆盖检查器，区分需求已验证、未展示与证据版本不一致，支持选型清单管理。

先把业务判断转为证据字段

微信入口可供顾客下单，后台是否支持独立商家与统一配送，要分别核对。能力表使用capability标识需求，demonstrated表示本次演示结果，version绑定演示版本，proof保存可追踪记录标识。示例只判断这些条件是否完整，不根据产品名给分。

需求集合由采购者按实际业务填写。示例选择merchant_isolation、dispatch和refund_reconcile三项，分别对应独立商家权限、配送任务、退款记录核对。这里只把一组核心检查项写入程序，完整选型仍包括账号、费用、部署和维护。

一段可复现的实现

使用Node.js内置断言，无第三方包。将下面代码保存为types.cjs，运行node types.cjs即可。函数对重复能力记录报错，避免一项需求出现相互冲突的证明。缺失、未演示、旧版本或空证明均列为待核对。

const assert = require('node:assert/strict');

function assess(required, evidence) {
  const keys = new Set();
  for (const item of evidence) {
    if (keys.has(item.capability)) throw new Error('duplicate capability');
    keys.add(item.capability);
  }
  const missing = required.filter(name => !evidence.some(item =>
    item.capability === name && item.demonstrated === true &&
    item.version === 'demo-v1' && item.proof.trim().length > 0));
  return {ready: missing.length === 0, missing};
}

const required = ['merchant_isolation', 'dispatch', 'refund_reconcile'];
const evidence = required.map(capability => ({capability,
  demonstrated: true, version: 'demo-v1', proof: `record-${capability}`}));
assert.deepEqual(assess(required, evidence), {ready: true, missing: []});
assert.deepEqual(assess(required, evidence.slice(0, 2)),
  {ready: false, missing: ['refund_reconcile']});
assert.equal(assess(required, evidence.map(item =>
  ({...item, version: 'old'}))).ready, false);
assert.equal(assess(required, evidence.map(item =>
  ({...item, proof: ''}))).ready, false);
assert.equal(assess(required, evidence.map(item =>
  ({...item, demonstrated: false}))).ready, false);
assert.throws(() => assess(required, [...evidence, evidence[0]]),
  /duplicate capability/);
console.log(JSON.stringify({assertions: 6,
  normal: assess(required, evidence),
  counterexample: assess(required, evidence.slice(0, 2))}));