const stubAll = (target) => {
    Object.getOwnPropertyNames(target).forEach((name) => {
      if (typeof target[name] === 'function') {
        const orig = target[name];
        console.log('sub', name);
        target[name] = (function (fnName) {
          target[name].orig = orig;
          return function (...args) {
            console.log('called', fnName);
            return target[name].orig.apply(target, args);
          };
        })();
      }
    });
  };