Classes: Expand test to cover strict runtime behavior

test/mjsunit/harmony/classes.js

Index: test/mjsunit/harmony/classes.js
diff --git a/test/mjsunit/harmony/classes.js b/test/mjsunit/harmony/classes.js
index 4efdaa179758d234a047597f2e42a4963a297c16..c8c25ff63bd74b37a42163c753d5f10055528dc2 100644
--- a/test/mjsunit/harmony/classes.js
+++ b/test/mjsunit/harmony/classes.js
@@ -159,6 +159,15 @@
   assertThrows('class C extends function B() { with ({}); return B; }() {}',
                SyntaxError);
 
+  var D = class extends function() {
+    arguments.caller;
+  } {};
+  assertThrows(function() {
+    Object.getPrototypeOf(D).arguments;
+  }, TypeError);
+  assertThrows(function() {
+    new D;
+  }, TypeError);
 })();