Add support for chai's assert.isEmpty and assert.isNotEmpty.
@@ -251,6 +251,20 @@ var assert = {};
*/
assert.fail = function(actual, expected, opt_message, opt_operator) {};
+
+/**
+ * @param {Object|Array|string|Map|Set} object
+ * @param {string=} opt_message
+ */
+assert.isEmpty = function(object, opt_message) {};
+
+/**
+ * @param {Object|Array|string|Map|Set} object
+ * @param {string=} opt_message
+ */
+assert.isNotEmpty = function(object, opt_message) {};
+
+
/**
* @param {*} object
* @param {string=} opt_message
