From c863c7768571447a28e9032cbccf079bdfc06225 Mon Sep 17 00:00:00 2001
From: Lam Wei Li <peteriman@mail.com>
Date: Tue, 15 Mar 2022 16:39:08 +0800
Subject: [PATCH] chore(test): updated file-sighup-test.js teardown() to
 reinstate warning listener

---
 test/tap/file-sighup-test.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/test/tap/file-sighup-test.js b/test/tap/file-sighup-test.js
index 71524f0..deb612a 100644
--- a/test/tap/file-sighup-test.js
+++ b/test/tap/file-sighup-test.js
@@ -14,11 +14,15 @@ test("file appender single SIGHUP handler", t => {
   const initialListeners = process.listenerCount("SIGHUP");
 
   let warning;
+  const originalListener = process.listeners("warning")[process.listeners("warning").length - 1];
   const warningListener = error => {
     if (error.type === "SIGHUP" && error.name === "MaxListenersExceededWarning") {
       warning = error;
+      return;
     }
+    originalListener(error);
   };
+  process.off("warning", originalListener);
   process.on("warning", warningListener);
 
   const config = {
@@ -39,12 +43,16 @@ test("file appender single SIGHUP handler", t => {
   log4js.configure(config);
 
   t.teardown(async () => {
+    // next event loop so that past warnings will not be printed
+    setImmediate(() => {
+      process.off("warning", warningListener);
+      process.on("warning", originalListener);
+    });
+
     await new Promise(resolve => { log4js.shutdown(resolve); });
 
     const filenames = Object.values(config.appenders).map(appender => appender.filename);
     await removeFiles(filenames);
-
-    process.off("warning", warningListener);
   });
 
   t.plan(2);