Add tests for symbol paths.

lodash.js

@@ -2739,7 +2739,7 @@
      * @returns {*} Returns the resolved value.
      */
     function baseGet(object, path) {
-      path = isKey(path, object) ? [path + ''] : baseCastPath(path);
+      path = isKey(path, object) ? [path] : baseCastPath(path);
 
       var index = 0,
           length = path.length;
@@ -3306,12 +3306,22 @@
      * @returns {Object} Returns the new object.
      */
     function basePickBy(object, predicate) {
-      var result = {};
-      baseForIn(object, function(value, key) {
+      var props = keysIn(object);
+      if (!isArray(object)) {
+        arrayPush(props, getSymbolsIn(object));
+      }
+      var index = -1,
+          length = props.length,
+          result = {};
+
+      while (++index < length) {
+        var key = props[index],
+            value = object[key];
+
         if (predicate(value, key)) {
           result[key] = value;
         }
-      });
+      }
       return result;
     }
 
@@ -3459,7 +3469,7 @@
      * @returns {Object} Returns `object`.
      */
     function baseSet(object, path, value, customizer) {
-      path = isKey(path, object) ? [path + ''] : baseCastPath(path);
+      path = isKey(path, object) ? [path] : baseCastPath(path);
 
       var index = -1,
           length = path.length,
@@ -3736,7 +3746,7 @@
      * @returns {boolean} Returns `true` if the property is deleted, else `false`.
      */
     function baseUnset(object, path) {
-      path = isKey(path, object) ? [path + ''] : baseCastPath(path);
+      path = isKey(path, object) ? [path] : baseCastPath(path);
       object = parent(object, path);
       var key = last(path);
       return (object != null && has(object, key)) ? delete object[key] : true;
@@ -5036,7 +5046,7 @@
     }
 
     /**
-     * Creates an array of the own symbol properties of `object`.
+     * Creates an array of the own enumerable symbol properties of `object`.
      *
      * @private
      * @param {Object} object The object to query.
@@ -5046,6 +5056,23 @@
       return [];
     };
 
+    /**
+     * Creates an array of the own and inherited enumerable symbol properties
+     * of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of symbols.
+     */
+    var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
+      var result = [];
+      while (object) {
+        arrayPush(result, getSymbols(object));
+        object = getPrototypeOf(object);
+      }
+      return result;
+    };
+
     /**
      * Gets the `toStringTag` of `value`.
      *