test: add regex check in test-vm-is-context

Jeyanthinath · MylesBorins · commit fff0e3993318 · 2017-07-11T17:43:45.000+01:00
Use a regex to validate the error message. PR-URL: #12785 Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/test/parallel/test-vm-is-context.js b/test/parallel/test-vm-is-context.js
@@ -5,7 +5,7 @@ const vm = require('vm');
 
 assert.throws(function() {
   vm.isContext('string is not supported');
-}, TypeError);
+}, /^TypeError: sandbox must be an object$/);
 
 assert.strictEqual(vm.isContext({}), false);
 assert.strictEqual(vm.isContext([]), false);
