From 81a9c7201f66855cdca534dae1a3f53f822a009b Mon Sep 17 00:00:00 2001
From: cjihrig <cjihrig@gmail.com>
Date: Sun, 2 Jun 2019 22:33:23 -0400
Subject: [PATCH] trace_events: respect inspect() depth

This commit causes the Tracing class to account for
util.inspect() depth.

PR-URL: https://github.com/nodejs/node/pull/28037
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
---
 lib/trace_events.js                |  3 +++
 test/parallel/test-util-inspect.js | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/lib/trace_events.js b/lib/trace_events.js
index 2b154946d86..0d533c76a78 100644
--- a/lib/trace_events.js
+++ b/lib/trace_events.js
@@ -61,6 +61,9 @@ class Tracing {
   }
 
   [customInspectSymbol](depth, opts) {
+    if (typeof depth === 'number' && depth < 0)
+      return this;
+
     const obj = {
       enabled: this.enabled,
       categories: this.categories
diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
index 834b0c0236a..f9566df48a1 100644
--- a/test/parallel/test-util-inspect.js
+++ b/test/parallel/test-util-inspect.js
@@ -2519,3 +2519,15 @@ assert.strictEqual(
     assert(i < 2 || line.startsWith('\u001b[90m'));
   });
 }
+
+{
+  // Tracing class respects inspect depth.
+  try {
+    const trace = require('trace_events').createTracing({ categories: ['fo'] });
+    const actual = util.inspect({ trace }, { depth: 0 });
+    assert.strictEqual(actual, '{ trace: [Tracing] }');
+  } catch (err) {
+    if (err.code !== 'ERR_TRACE_EVENTS_UNAVAILABLE')
+      throw err;
+  }
+}