test: fix common.mustCall length and name properties

test/common/index.js

@@ -387,10 +387,28 @@ function _mustCallInner(fn, criteria = 1, field) {
 
  mustCallChecks.push(context);
 
- return function() {
+ const _return = function() { // eslint-disable-line func-style
  context.actual++;
  return fn.apply(this, arguments);
  };
+ // Function instances have own properties that may be relevant.
+ // Let's replicate those properties to the returned function.
+ // Refs: https://tc39.es/ecma262/#sec-function-instances
+ Object.defineProperties(_return, {
+ name: {
+ value: fn.name,
+ writable: false,
+ enumerable: false,
+ configurable: true,
+ },
+ length: {
+ value: fn.length,
+ writable: false,
+ enumerable: false,
+ configurable: true,
+ },
+ });
+ return _return;
 }
 
 function hasMultiLocalhost() {