util: fix debuglog.enabled not being present with callback logger

The method returned by the callback is missing the .enabled property.
This is added in a consistent way that it also verifies that it's a
getter.
Fixes: #56676
PR-URL: #59858
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: BridgeAR

lib/internal/util/debuglog.js

@@ -94,8 +94,17 @@ function debuglog(set, cb) {
 // Only invokes debuglogImpl() when the debug function is
 // called for the first time.
 debug=debuglogImpl(enabled,set);
-if(typeofcb==='function')
+if(typeofcb==='function'){
+ObjectDefineProperty(debug,'enabled',{
+__proto__: null,
+get(){
+returnenabled;
+},
+configurable: true,
+enumerable: true,
+});
 cb(debug);
+}
 switch(args.length){
 case1: returndebug(args[0]);
 case2: returndebug(args[0],args[1]);

test/sequential/test-util-debug.js

@@ -57,7 +57,7 @@ function parent() {
 
 functiontest(environ,shouldWrite,section,forceColors=false){
 letexpectErr='';
-constexpectOut=shouldWrite ? 'enabled\n' : 'disabled\n';
+constexpectOut=shouldWrite ? 'outer enabled\ninner enabled\n' : 'outer disabled\ninner disabled\n';
 
 constspawn=require('child_process').spawn;
 constchild=spawn(process.execPath,[__filename,'child',section],{
@@ -117,11 +117,18 @@ function child(section) {
 Object.defineProperty(process.stderr,'hasColors',{
 value: tty.WriteStream.prototype.hasColors
 });
+
+letinnerDebug=null;
 // eslint-disable-next-line no-restricted-syntax
 constdebug=util.debuglog(section,common.mustCall((cb)=>{
 assert.strictEqual(typeofcb,'function');
+innerDebug=cb;
 }));
 debug('this',{is: 'a'},/debugging/);
 debug('num=%d str=%s obj=%j',1,'a',{foo: 'bar'});
-console.log(debug.enabled ? 'enabled' : 'disabled');
+console.log(debug.enabled ? 'outer enabled' : 'outer disabled');
+console.log(innerDebug.enabled ? 'inner enabled' : 'inner disabled');
+
+assert.strictEqual(typeofObject.getOwnPropertyDescriptor(debug,'enabled').get,'function');
+assert.strictEqual(typeofObject.getOwnPropertyDescriptor(innerDebug,'enabled').get,'function');
 }