Fixed #165. Switched the order of treeprocessors when attr_list and headerid extensions are used togeather. While this means headerid may alter IDs defined in attr_lists for uniqueness, automaticaly generated ids will not contain unparsed attr_lists. This is the lesser of two evils - and actually generates a more valid output (all IDs will be unique)

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/test_extensions.py b/tests/test_extensions.py
index 315e7ef..b10414e 100644
--- a/tests/test_extensions.py
+++ b/tests/test_extensions.py
@@ -171,6 +171,18 @@ header_forceid: Off
         self.assertEqual(markdown.markdown(text, ['headerid', 'meta']),
             '<h2>A Header</h2>')
 
+    def testHeaderIdWithAttr_List(self):
+        """ Test HeaderIDs with Attr_List extension. """
+        
+        text = '# Header1 {: #foo }\n# Header2 {: .bar }'
+        self.assertEqual(markdown.markdown(text, ['headerid', 'attr_list']),
+            '<h1 id="foo">Header1</h1>\n'
+            '<h1 class="bar" id="header2">Header2</h1>')
+        # Switch order extensions are loaded - should be no change in behavior.
+        self.assertEqual(markdown.markdown(text, ['attr_list', 'headerid']),
+            '<h1 id="foo">Header1</h1>\n'
+            '<h1 class="bar" id="header2">Header2</h1>')
+
 class TestMetaData(unittest.TestCase):
     """ Test MetaData extension. """