test: increase coverage for AbortController

Refs: https://coverage.nodejs.org/coverage-68e6673224365120/lib/internal/abort_controller.js.html#L126

PR-URL: https://github.com/nodejs/node/pull/38514
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

test/parallel/test-abortcontroller.js

@@ -2,6 +2,7 @@
 'use strict';
 
 const common = require('../common');
+const { inspect } = require('util');
 
 const { ok, strictEqual, throws } = require('assert');
 
@@ -132,3 +133,11 @@ const { ok, strictEqual, throws } = require('assert');
     );
   }
 }
+
+{
+  const ac = new AbortController();
+  strictEqual(inspect(ac, { depth: 1 }),
+              'AbortController { signal: [AbortSignal] }');
+  strictEqual(inspect(ac, { depth: null }),
+              'AbortController { signal: AbortSignal { aborted: false } }');
+}