From d14306a9ca630ade0074afdebe5a856f5cf89b92 Mon Sep 17 00:00:00 2001
From: zzmp <zmp@umich.edu>
Date: Wed, 17 Sep 2014 14:19:46 -0700
Subject: [PATCH] fix mock requestAnimationFrame to allow chaining

---
 tests/mock.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tests/mock.js b/tests/mock.js
index 5629dbce..4cd2633f 100644
--- a/tests/mock.js
+++ b/tests/mock.js
@@ -93,8 +93,11 @@ mock.window = new function() {
 	}
 	window.requestAnimationFrame.$id = 1
 	window.requestAnimationFrame.$resolve = function() {
-		if (window.requestAnimationFrame.$callback) window.requestAnimationFrame.$callback()
-		window.requestAnimationFrame.$callback = null
+		if (window.requestAnimationFrame.$callback) {
+			var callback = window.requestAnimationFrame.$callback
+			window.requestAnimationFrame.$callback = null
+			callback()
+		}
 	}
 	window.XMLHttpRequest = new function() {
 		var request = function() {