Add bizarro tests for Object.getOwnPropertySymbols.

test/index.html

@@ -106,9 +106,12 @@
 
           setProperty(Map, 'toString', createToString('Map'));
         }
-        setProperty(Object, '_create', window.create);
+        setProperty(Object, '_create', Object.create);
         setProperty(Object, 'create', noop);
 
+        setProperty(Object, '_getOwnPropertySymbols', Object.getOwnPropertySymbols);
+        setProperty(Object, 'getOwnPropertySymbols', undefined);
+
         setProperty(window, '_Set', window.Set);
         setProperty(window, 'Set', noop);
 
@@ -133,6 +136,11 @@
         } else {
           delete Object.create;
         }
+        if (Object._getOwnPropertySymbols) {
+          Object.getOwnPropertySymbols = Object._getOwnPropertySymbols;
+        } else {
+          delete Object.getOwnPropertySymbols;
+        }
         if (_Map) {
           Map = _Map;
         } else {
@@ -163,6 +171,7 @@
         delete funcProto._method;
         delete objectProto._propertyIsEnumerable;
         delete Object._create;
+        delete Object._getOwnPropertySymbols;
       }
 
       // Load lodash to expose it to the bad extensions/shims.

test/test.js

@@ -421,6 +421,10 @@
       setProperty(root.Map, 'toString', createToString('Map'));
     }
     setProperty(Object, 'create', noop);
+
+    var _getOwnPropertySymbols = Object.getOwnPropertySymbols;
+    setProperty(Object, 'getOwnPropertySymbols', undefined);
+
     setProperty(root, 'Set', noop);
     setProperty(root, 'WeakMap', noop);
 
@@ -435,6 +439,11 @@
     root._ = oldDash;
 
     // Restore built-in methods.
+    if (_getOwnPropertySymbols) {
+      Object.getOwnPropertySymbols = _getOwnPropertySymbols;
+    } else {
+      delete Object.getOwnPropertySymbols;
+    }
     if (Map) {
       setProperty(root, 'Map', Map);
     } else {
@@ -652,7 +661,7 @@
     });
 
     QUnit.test('should avoid overwritten native methods', function(assert) {
-      assert.expect(4);
+      assert.expect(5);
 
       function message(lodashMethod, nativeMethod) {
         return '`' + lodashMethod + '` should avoid overwritten native `' + nativeMethod + '`';
@@ -686,6 +695,19 @@
         label = message('_.difference`, `_.intersection`, and `_.uniq', 'Object.create` and `Map');
         assert.deepEqual(actual, [[otherObject], [object], [object]], label);
 
+        try {
+          if (Symbol) {
+            object[Symbol()] = {};
+          }
+          actual = [
+            lodashBizarro.clone(object),
+            lodashBizarro.cloneDeep(object)
+          ];
+        } catch (e) {
+          actual = null;
+        }
+        assert.deepEqual(actual, [object, object], 'Object.getOwnPropertySymbols');
+
         try {
           var map = new lodashBizarro.memoize.Cache;
           actual = map.set('a', 1).get('a');
@@ -708,7 +730,7 @@
         assert.deepEqual(actual, [], label);
       }
       else {
-        skipTest(assert, 4);
+        skipTest(assert, 5);
       }
     });
   }());