test: use regular expression to match error msg

Amunu · addaleax · commit a338b942140f · 2017-07-18T19:59:21.000+02:00
PR-URL: #14265 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
diff --git a/test/parallel/test-stream-writable-null.js b/test/parallel/test-stream-writable-null.js
@@ -19,7 +19,7 @@ MyWritable.prototype._write = function(chunk, encoding, callback){
 assert.throws(() =>{
 const m = new MyWritable({objectMode: true});
 m.write(null, (err) => assert.ok(err));
-}, TypeError, 'May not write null values to stream');
+}, /^TypeError: May not write null values to stream$/);
 assert.doesNotThrow(() =>{
 const m = new MyWritable({objectMode: true}).on('error', (e) =>{
 assert.ok(e);

-Original file line number
+Diff line change
 assert.throws(()=>{
 constm=newMyWritable({objectMode: true});
 m.write(null,(err)=>assert.ok(err));
 -},TypeError,'May not write null values to stream');
 +},/^TypeError:Maynotwritenullvaluestostream$/);
 assert.doesNotThrow(()=>{
 constm=newMyWritable({objectMode: true}).on('error',(e)=>{
 assert.ok(e);