From cb5c93a654e235a6b436946e3d6baa25ba64bc3e Mon Sep 17 00:00:00 2001
From: Anna Henningsen <anna@addaleax.net>
Date: Wed, 19 Apr 2017 19:17:31 +0200
Subject: [PATCH 1/2] test: introduce `common.crashOnUnhandledRejection`

Ref: https://github.com/nodejs/node/pull/12442
PR-URL: https://github.com/nodejs/node/pull/12489
Reviewed-By: Matthew Loring <mattloring@google.com>
Reviewed-By: Julien Gilli <jgilli@nodejs.org>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 test/common.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/common.js b/test/common.js
index dcd830420c3c6f..54357af6ca8e4c 100644
--- a/test/common.js
+++ b/test/common.js
@@ -552,3 +552,9 @@ exports.expectWarning = function(name, expected) {
     expected.splice(expected.indexOf(warning.message), 1);
   }, expected.length));
 };
+
+// Crash the process on unhandled rejections.
+exports.crashOnUnhandledRejection = function() {
+  process.on('unhandledRejection',
+             (err) => process.nextTick(() => { throw err; }));
+};

From 46d6281c303604f96806dec96c5ab3bfe50e8499 Mon Sep 17 00:00:00 2001
From: Anna Henningsen <anna@addaleax.net>
Date: Thu, 27 Apr 2017 18:09:57 +0200
Subject: [PATCH 2/2] test,doc: document `crashOnUnhandledRejection()`

Add documentation for `common.crashOnUnhandledRejection()`.

Ref: https://github.com/nodejs/node/pull/12489/files/a9c2078a60bc3012dc6156df19772697a56a2517#r113737423
PR-URL: https://github.com/nodejs/node/pull/12699
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
---
 test/README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/test/README.md b/test/README.md
index 381402770c8621..a97e5f222b4627 100644
--- a/test/README.md
+++ b/test/README.md
@@ -174,6 +174,13 @@ A stream to push an array into a REPL
 
 Blocks for `time` amount of time.
 
+### crashOnUnhandledRejection()
+
+Installs a `process.on('unhandledRejection')` handler that crashes the process
+after a tick. This is useful for tests that use Promises and need to make sure
+no unexpected rejections occur, because currently they result in silent
+failures.
+
 ### ddCommand(filename, kilobytes)
 * return [&lt;Object>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)