test: add deprecation code to expectWarning

This commit adds a deprecation code to expectWarning and updates the
function to check the passed code against the code property on the
warning object.

Not all warnings have a deprecation code so for those that don't an
explicit code of common.noWarnCode is required. Passing this skips the
assertion of the code.

PR-URL: https://github.com/nodejs/node/pull/19474
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

1 files changed, 4 insertions, 4 deletions

diff --git a/test/parallel/test-promises-unhandled-proxy-rejections.js b/test/parallel/test-promises-unhandled-proxy-rejections.js
index f632857d63..dfd1ee322a 100644
--- a/test/parallel/test-promises-unhandled-proxy-rejections.js
+++ b/test/parallel/test-promises-unhandled-proxy-rejections.js
@@ -1,16 +1,16 @@
 'use strict';
 const common = require('../common');
 
-const expectedDeprecationWarning = 'Unhandled promise rejections are ' +
+const expectedDeprecationWarning = ['Unhandled promise rejections are ' +
                                    'deprecated. In the future, promise ' +
                                    'rejections that are not handled will ' +
                                    'terminate the Node.js process with a ' +
-                                   'non-zero exit code.';
-const expectedPromiseWarning = 'Unhandled promise rejection. ' +
+                                   'non-zero exit code.', 'DEP0018'];
+const expectedPromiseWarning = ['Unhandled promise rejection. ' +
   'This error originated either by throwing ' +
   'inside of an async function without a catch ' +
   'block, or by rejecting a promise which was ' +
-  'not handled with .catch(). (rejection id: 1)';
+  'not handled with .catch(). (rejection id: 1)', common.noWarnCode];
 
 function throwErr() {
   throw new Error('Error from proxy');