test: replace assertion error check with regex

PR-URL: #12603 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Refael Ackermann <[email protected]> Reviewed-By: Alexey Orlenko <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]>

Author: TheLady

test/parallel/test-v8-flag-type-check.js

@@ -3,5 +3,7 @@ require('../common');
 constassert=require('assert');
 constv8=require('v8');
 
-assert.throws(function(){v8.setFlagsFromString(1);},TypeError);
-assert.throws(function(){v8.setFlagsFromString();},TypeError);
+assert.throws(function(){v8.setFlagsFromString(1);},
+/^TypeError:v8flagmustbeastring$/);
+assert.throws(function(){v8.setFlagsFromString();},
+/^TypeError:v8flagisrequired$/);

test/parallel/test-v8-flags.js

@@ -12,5 +12,7 @@ assert(eval('%_IsSmi(42)'));
 assert(vm.runInThisContext('%_IsSmi(43)'));
 
 v8.setFlagsFromString('--noallow_natives_syntax');
-assert.throws(function(){eval('%_IsSmi(44)');},SyntaxError);
-assert.throws(function(){vm.runInThisContext('%_IsSmi(45)');},SyntaxError);
+assert.throws(function(){eval('%_IsSmi(44)');},
+/^SyntaxError:Unexpectedtoken%$/);
+assert.throws(function(){vm.runInThisContext('%_IsSmi(45)');},
+/^SyntaxError:Unexpectedtoken%$/);