test: check complete error message

fraserxu · Fishrock123 · commit 7eafd966c2f7 · 2017-07-19T15:02:42.000-04:00
In test-stream-writable-change-default-encoding, use a regular expression to match the complete error message. PR-URL: #14264 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Bryan English <bryan@bryanenglish.com>
diff --git a/test/parallel/test-stream-writable-change-default-encoding.js b/test/parallel/test-stream-writable-change-default-encoding.js
@@ -61,7 +61,7 @@ assert.throws(function changeDefaultEncodingToInvalidValue() {
   m.setDefaultEncoding({});
   m.write('bar');
   m.end();
-}, TypeError);
+}, /^TypeError: Unknown encoding: \[object Object\]$/);
 
 (function checkVairableCaseEncoding() {
   const m = new MyWritable(function(isBuffer, type, enc) {
