test: check codes of thrown errors

PR-URL: https://github.com/nodejs/node/pull/23519
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: George Adams <george.adams@uk.ibm.com>

2 files changed, 16 insertions, 7 deletions

diff --git a/test/parallel/test-buffer-alloc.js b/test/parallel/test-buffer-alloc.js
index 6afcbf1b03b..feca4488119 100644
--- a/test/parallel/test-buffer-alloc.js
+++ b/test/parallel/test-buffer-alloc.js
@@ -967,12 +967,16 @@ common.expectsError(
     message: 'argument must be a buffer'
   });
 
-const regErrorMsg =
-  new RegExp('The first argument must be one of type string, Buffer, ' +
-             'ArrayBuffer, Array, or Array-like Object\\.');
-
-assert.throws(() => Buffer.from(), regErrorMsg);
-assert.throws(() => Buffer.from(null), regErrorMsg);
+assert.throws(() => Buffer.from(), {
+  name: 'TypeError [ERR_INVALID_ARG_TYPE]',
+  message: 'The first argument must be one of type string, Buffer, ' +
+  'ArrayBuffer, Array, or Array-like Object. Received type undefined'
+});
+assert.throws(() => Buffer.from(null), {
+  name: 'TypeError [ERR_INVALID_ARG_TYPE]',
+  message: 'The first argument must be one of type string, Buffer, ' +
+  'ArrayBuffer, Array, or Array-like Object. Received type object'
+});
 
 // Test prototype getters don't throw
 assert.strictEqual(Buffer.prototype.parent, undefined);
diff --git a/test/parallel/test-buffer-arraybuffer.js b/test/parallel/test-buffer-arraybuffer.js
index 8d26f983f2b..2a1ce141079 100644
--- a/test/parallel/test-buffer-arraybuffer.js
+++ b/test/parallel/test-buffer-arraybuffer.js
@@ -40,7 +40,12 @@ assert.throws(function() {
   Object.setPrototypeOf(AB, ArrayBuffer);
   Object.setPrototypeOf(AB.prototype, ArrayBuffer.prototype);
   Buffer.from(new AB());
-}, TypeError);
+}, {
+  code: 'ERR_INVALID_ARG_TYPE',
+  name: 'TypeError [ERR_INVALID_ARG_TYPE]',
+  message: 'The first argument must be one of type string, Buffer,' +
+  ' ArrayBuffer, Array, or Array-like Object. Received type object'
+});
 
 // Test the byteOffset and length arguments
 {