Improve RegEx button in vc builder

Change-Id: Iea748a41b78e4112a1e884b9b0ca6be05c5332e8
diff --git a/dev/js/spec/vcSpec.js b/dev/js/spec/vcSpec.js
index 83ee822..bfdf9fa 100644
--- a/dev/js/spec/vcSpec.js
+++ b/dev/js/spec/vcSpec.js
@@ -2824,10 +2824,17 @@
     });
 
     it('should have a classed element', function () {
-      var sv = stringValClass.create();
+      const sv = stringValClass.create();
       expect(sv.element().classList.contains('regex')).toBe(false);
       expect(sv.regex()).toBe(false);
-      sv.toggleRegex();
+
+      const re = sv.element().children[1];
+      expect(re.textContent).toEqual('RegEx');
+      expect(re.getAttribute("title")).toEqual('Use as regular expression');
+
+      // Run event instead toggleRegex()
+      re.click();
+
       expect(sv.element().classList.contains('regex')).toBe(true);
     });