ES6 symbols: prevent reflection and proxy APIs from leaking symbols

test/mjsunit/harmony/object-observe.js

Index: test/mjsunit/harmony/object-observe.js
diff --git a/test/mjsunit/harmony/object-observe.js b/test/mjsunit/harmony/object-observe.js
index 584d9e82d649879f380f60ef5fb94e0458a86596..263154a406a525a1dd652f8da1dda5363ed74901 100644
--- a/test/mjsunit/harmony/object-observe.js
+++ b/test/mjsunit/harmony/object-observe.js
@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --harmony-observation --harmony-proxies --harmony-collections
-// Flags: --allow-natives-syntax
+// Flags: --harmony-symbols --allow-natives-syntax
 
 var allObservers = [];
 function reset() {
@@ -448,6 +448,29 @@ observer.assertCallbackRecords([
 ]);
 
 
+// Observing symbol properties (not).
+print("*****")
+reset();
+var obj = {}
+var symbol = Symbol("secret");
+Object.observe(obj, observer.callback);
+obj[symbol] = 3;
+delete obj[symbol];
+Object.defineProperty(obj, symbol, {get: function() {}, configurable: true});
+Object.defineProperty(obj, symbol, {value: 6});
+Object.defineProperty(obj, symbol, {writable: false});
+delete obj[symbol];
+Object.defineProperty(obj, symbol, {value: 7});
+++obj[symbol];
+obj[symbol]++;
+obj[symbol] *= 3;
+delete obj[symbol];
+obj.__defineSetter__(symbol, function() {});
+obj.__defineGetter__(symbol, function() {});
+Object.deliverChangeRecords(observer.callback);
+observer.assertNotCalled();
+
+
 // Test all kinds of objects generically.
 function TestObserveConfigurable(obj, prop) {
   reset();