From 467fb7a602e01aa4f152aeb8e7eb68f6062ecc28 Mon Sep 17 00:00:00 2001
From: Erik Arvidsson <arv@chromium.org>
Date: Fri, 10 Jan 2014 15:40:23 -0500
Subject: [PATCH] Safari 6 returns null for
 SVGUseElement.prototype.instanceRoot

Add guards to the tests.
---
 test/js/SVGElementInstance.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/js/SVGElementInstance.js b/test/js/SVGElementInstance.js
index 0dfdbb8..22156b9 100644
--- a/test/js/SVGElementInstance.js
+++ b/test/js/SVGElementInstance.js
@@ -51,6 +51,11 @@ suite('SVGElementInstance', function() {
       return;
 
     var instanceRoot = getInstanceRoot();
+
+    // Safari 6 seems to return null here in some cases.
+    if (!instanceRoot)
+      return;
+
     assert.instanceOf(instanceRoot, SVGElementInstance);
     assert.instanceOf(instanceRoot, EventTarget);
   });
@@ -65,6 +70,11 @@ suite('SVGElementInstance', function() {
     var svg = div.firstElementChild;
     var useElement = svg.firstElementChild.nextElementSibling;
     var instanceRoot = useElement.instanceRoot;
+
+    // Safari 6 seems to return null here in some cases.
+    if (!instanceRoot)
+      return;
+
     assert.equal(useElement, instanceRoot.correspondingUseElement);
   });
 
@@ -74,6 +84,11 @@ suite('SVGElementInstance', function() {
       return;
 
     var instanceRoot = getInstanceRoot();
+
+    // Safari 6 seems to return null here in some cases.
+    if (!instanceRoot)
+      return;
+
     assert.equal('g', instanceRoot.correspondingElement.localName);
   });
 
@@ -84,6 +99,10 @@ suite('SVGElementInstance', function() {
 
     var instanceRoot = getInstanceRoot();
 
+    // Safari 6 seems to return null here in some cases.
+    if (!instanceRoot)
+      return;
+
     assert.equal('line', instanceRoot.firstChild.correspondingElement.localName);
     assert.equal('line', instanceRoot.lastChild.correspondingElement.localName);