Tests for spec violation generically by enumerating properties.

test/suite/sputnik/Conformance/11_Expressions/11.4_Unary_Operators/11.4.1_The_delete_Operator/S11.4.1_A5.js

@@ -11,12 +11,22 @@
  * @onlyStrict
  */
 "use strict";
-var deleted = 'unassigned';
-try {
-  deleted = delete RegExp.leftContext;
-} catch (err) {
 
-}
-if (deleted === false) {
-  $ERROR('Strict delete returned false');
+var reNames = Object.getOwnPropertyNames(RegExp);
+for (var i = 0, len = reNames.length; i < len; i++) {
+  var reName = reNames[i];
+  if (reName !== 'prototype') {
+    var deleted = 'unassigned';
+    try {
+      deleted = delete RegExp[reName];
+    } catch (err) {
+      if (!(err instanceof TypeError)) {
+        $ERROR('#1: strict delete threw a non-TypeError: ' + err);
+      }
+      // fall through
+    }
+    if (deleted === false) {
+      $ERROR('#2: Strict delete returned false');
+    }
+  }
 }