fix: passing options to custom inspect

Node internal objects (like URL) expect options to be passed in to inspect call. Without these options inspecting some native objects will result in unexpected errors.

index.js

@@ -194,7 +194,16 @@ module.exports = function inspect_(obj, options, depth, seen) {
     }
     if (typeof obj === 'object' && customInspect) {
         if (inspectSymbol && typeof obj[inspectSymbol] === 'function') {
-            return obj[inspectSymbol]();
+            return obj[inspectSymbol](maxDepth - depth, {
+                breakLength: 60,
+                colors: false,
+                customInspect: true,
+                depth: maxDepth,
+                maxArrayLength: 100,
+                seen: seen,
+                showHidden: false,
+                showProxy: false
+            });
         } else if (customInspect !== 'symbol' && typeof obj.inspect === 'function') {
             return obj.inspect();
         }

test/inspect.js

@@ -2,7 +2,6 @@ var test = require('tape');
 var hasSymbols = require('has-symbols/shams')();
 var utilInspect = require('../util.inspect');
 var repeat = require('string.prototype.repeat');
-
 var inspect = require('..');
 
 test('inspect', function (t) {
@@ -100,3 +99,40 @@ test('maxStringLength', function (t) {
 
     t.end();
 });
+
+test('inspect Options', function (t) {
+    var obj = {};
+    obj[utilInspect.custom] = function (depth, opts) {
+        return String(depth) + ':' + JSON.stringify(opts);
+    };
+    t.equal(
+        inspect(obj),
+        '5:{"breakLength":60,"colors":false,"customInspect":true,"depth":5,"maxArrayLength":100,"seen":[],"showHidden":false,"showProxy":false}',
+        'direct inspect will fallback to default maxdepth = 5'
+    );
+    t.equal(
+        inspect(obj, { depth: 2 }),
+        '2:{"breakLength":60,"colors":false,"customInspect":true,"depth":2,"maxArrayLength":100,"seen":[],"showHidden":false,"showProxy":false}',
+        'custom depth will be passed to the inspect call'
+    );
+    t.equal(
+        inspect({ d1: obj }, { depth: 3 }),
+        '{ d1: 2:{"breakLength":60,"colors":false,"customInspect":true,"depth":3,"maxArrayLength":100,"seen":[{"d1":{}}],"showHidden":false,"showProxy":false} }',
+        'the passed-in depth is reduced if the object is deeper in the hierarchy'
+    );
+    t.equal(
+        inspect({ d1: obj }, { depth: 1 }),
+        '{ d1: [Object] }',
+        'unlike nodejs inspect, customInspect will not be used once the depth is exceeded.'
+    );
+    t.end();
+});
+
+test('inspect URL', { skip: typeof URL === 'undefined' }, function (t) {
+    t.equal(
+        inspect(new URL('https://nodejs.org')),
+        'URL {\n  href: \'https://nodejs.org/\',\n  origin: \'https://nodejs.org\',\n  protocol: \'https:\',\n  username: \'\',\n  password: \'\',\n  host: \'nodejs.org\',\n  hostname: \'nodejs.org\',\n  port: \'\',\n  pathname: \'/\',\n  search: \'\',\n  searchParams: URLSearchParams {},\n  hash: \'\'\n}',
+        'url can be inspected'
+    );
+    t.end();
+});