timers: add hasRef method to Timeout & Immediate

Provide a way to check whether the current timer or immediate is refed.

PR-URL: https://github.com/nodejs/node/pull/20898
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/test/parallel/test-timers-unref.js b/test/parallel/test-timers-unref.js
index 8c4891f1ed..35615d111a 100644
--- a/test/parallel/test-timers-unref.js
+++ b/test/parallel/test-timers-unref.js
@@ -23,6 +23,8 @@
 
 const common = require('../common');
 
+const assert = require('assert');
+
 let unref_interval = false;
 let unref_timer = false;
 let checks = 0;
@@ -30,8 +32,12 @@ let checks = 0;
 const LONG_TIME = 10 * 1000;
 const SHORT_TIME = 100;
 
+const timer = setTimeout(() => {}, 10);
+assert.strictEqual(timer.hasRef(), true);
 // Should not throw.
-setTimeout(() => {}, 10).unref().ref().unref();
+timer.unref().ref().unref();
+assert.strictEqual(timer.hasRef(), false);
+
 setInterval(() => {}, 10).unref().ref().unref();
 
 setInterval(common.mustNotCall('Interval should not fire'), LONG_TIME).unref();