From 5886326cd0d0e2415b58f90eb65fde2d28ae44eb Mon Sep 17 00:00:00 2001
From: "Edward Z. Yang" <ezyang@cs.stanford.edu>
Date: Mon, 6 Mar 2017 23:26:55 -0800
Subject: [PATCH] Test for catastrophic backtracking.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
---
 tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php b/tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php
index 670ca0b2..e0c398f7 100644
--- a/tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php
+++ b/tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php
@@ -256,6 +256,12 @@ text-align:center
         $this->assertCleanCSS("a .foo #ID div.cl#foo {\nbackground:url(\"http://foo/BAR\")\n}");
     }
 
+    public function test_extractStyleBlocks_backtracking()
+    {
+        $goo = str_repeat("a", 1000000); // 1M to trigger, sometimes it's less!
+        $this->assertExtractStyleBlocks("<style></style>" . $goo, $goo, array(''));
+    }
+
 }
 
 // vim: et sw=4 sts=4
-- 
2.11.4.GIT