From 579fae8d572c6e7ead4335f2bed0336dd073b181 Mon Sep 17 00:00:00 2001
From: Santiago Gimeno <santiago.gimeno@gmail.com>
Date: Mon, 4 Jul 2022 08:51:35 +0200
Subject: [PATCH] test: fix flaky test-perf-hooks-histogram

Make sure the histogram containing event loop delay info is posted only
when at least one datapoint is collected.

Fixes: https://github.com/nodejs/node/issues/43503

PR-URL: https://github.com/nodejs/node/pull/43567
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 test/parallel/test-perf-hooks-histogram.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/test/parallel/test-perf-hooks-histogram.js b/test/parallel/test-perf-hooks-histogram.js
index 2137c1b2a3b..1bcc59653bb 100644
--- a/test/parallel/test-perf-hooks-histogram.js
+++ b/test/parallel/test-perf-hooks-histogram.js
@@ -89,7 +89,12 @@ const { inspect } = require('util');
     strictEqual(data.enable, undefined);
     mc.port1.close();
   });
-  setTimeout(() => mc.port2.postMessage(e), 100);
+  const interval = setInterval(() => {
+    if (e.count > 0) {
+      clearInterval(interval);
+      mc.port2.postMessage(e);
+    }
+  }, 50);
 }
 
 {