test: cleanup test-util-inherits.js

Replaced constructor with regular expression for assert.throw(). PR-URL: #12602 Reviewed-By: Santiago Gimeno <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Rich Trott <[email protected]>

Author: RobotMermaid

test/parallel/test-util-inherits.js

@@ -3,6 +3,10 @@
 require('../common');
 constassert=require('assert');
 constinherits=require('util').inherits;
+consterrCheck=
+newRegExp('^TypeError: The super constructor to "inherits" must not be '+
+'null or undefined$');
+
 
 // super constructor
 functionA(){
@@ -75,6 +79,12 @@ assert.strictEqual(e.e(), 'e');
 assert.strictEqual(e.constructor,E);
 
 // should throw with invalid arguments
-assert.throws(function(){inherits(A,{});},TypeError);
-assert.throws(function(){inherits(A,null);},TypeError);
-assert.throws(function(){inherits(null,A);},TypeError);
+assert.throws(function(){
+inherits(A,{});
+},/^TypeError:Thesuperconstructorto"inherits"musthaveaprototype$/);
+assert.throws(function(){
+inherits(A,null);
+},errCheck);
+assert.throws(function(){
+inherits(null,A);
+},/^TypeError:Theconstructorto"inherits"mustnotbenullorundefined$/);