MAGETWO-82426: Fix "pattern" UI Component validation #11565

Author: vrann

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -360,7 +360,7 @@ define([
         ],
         'pattern': [
             function (value, param) {
-                return param.test(value);
+                return new RegExp(param).test(value);
             },
             $.mage.__('Invalid format.')
         ],