From f5a1e6cbc4039f0727880f39f0349aa63a9573d3 Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Wed, 6 Dec 2017 14:57:13 -0800
Subject: [PATCH] test: fix flaky async-hooks/test-graph.signal

Make sure event loop remains open long enough for signal to be received.

PR-URL: https://github.com/nodejs/node/pull/17509
Fixes: https://github.com/nodejs/node/issues/14568
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
---
 test/async-hooks/test-graph.signal.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/test/async-hooks/test-graph.signal.js b/test/async-hooks/test-graph.signal.js
index 92334b98268840..770fe00da4b4a6 100644
--- a/test/async-hooks/test-graph.signal.js
+++ b/test/async-hooks/test-graph.signal.js
@@ -3,16 +3,16 @@
 const common = require('../common');
 if (common.isWindows) {
   common.skip('no signals on Windows');
-  return;
 }
 
 const initHooks = require('./init-hooks');
 const verifyGraph = require('./verify-graph');
-const exec = require('child_process').exec;
+const { exec } = require('child_process');
 
 const hooks = initHooks();
 
 hooks.enable();
+const interval = setInterval(() => {}, 9999); // keep event loop open
 process.on('SIGUSR2', common.mustCall(onsigusr2, 2));
 
 let count = 0;
@@ -33,7 +33,9 @@ function onsigusr2() {
   }
 }
 
-function onsigusr2Again() {}
+function onsigusr2Again() {
+  clearInterval(interval); // let the event loop close
+}
 
 process.on('exit', onexit);