properly handling invalid scryRenderedDOMComponentsWithClass args (#6529

) properly handling invalid scryRenderedDOMComponentsWithClass args properly handle invalid scryRenderedDOMComponentsWithClass args (cherry picked from commit 9df54e0)
facebook · Apr 28, 2016 · 2606966 · 2606966
1 parent c98f0e6
commit 2606966
Showing 1 changed file with 9 additions and 3 deletions.
diff --git a/src/test/ReactTestUtils.js b/src/test/ReactTestUtils.js
@@ -178,9 +178,6 @@ var ReactTestUtils = {
    * @return {array} an array of all the matches.
    */
   scryRenderedDOMComponentsWithClass: function(root, classNames) {
-    if (!Array.isArray(classNames)) {
-      classNames = classNames.split(/\s+/);
-    }
     return ReactTestUtils.findAllInRenderedTree(root, function(inst) {
       if (ReactTestUtils.isDOMComponent(inst)) {
         var className = inst.className;
@@ -189,6 +186,15 @@ var ReactTestUtils = {
           className = inst.getAttribute('class') || '';
         }
         var classList = className.split(/\s+/);
+
+        if (!Array.isArray(classNames)) {
+          invariant(
+            classNames !== undefined,
+            'TestUtils.scryRenderedDOMComponentsWithClass expects a ' +
+            'className as a second argument.'
+          );
+          classNames = classNames.split(/\s+/);
+        }
         return classNames.every(function(name) {
           return classList.indexOf(name) !== -1;
         });