From fe9cecd50710c5be079072ad29a258b5cae45df3 Mon Sep 17 00:00:00 2001
From: Paul O'Shannessy <poshannessy@fb.com>
Date: Thu, 27 Mar 2014 13:17:39 -0700
Subject: [PATCH] Clean up assertions on descriptors

By making this fail, we catch a lot of tests that are expecting rendered
instances but are actually operating on descriptors.
---
 src/test/ReactTestUtils.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/test/ReactTestUtils.js b/src/test/ReactTestUtils.js
index 8d34272703..4b067f7cee 100644
--- a/src/test/ReactTestUtils.js
+++ b/src/test/ReactTestUtils.js
@@ -74,6 +74,10 @@ var ReactTestUtils = {
     if (!ReactComponent.isValidComponent(inst)) {
       return false;
     }
+    if (inst.__realComponentInstance) {
+      // This is a descriptor membrane
+      return false;
+    }
     // We check the prototype of the type that will get mounted, not the
     // instance itself. This is a future proof way of duck typing.
     var prototype = inst.type.prototype;