Implement reset() for Meta extension (#672)

Fixes #671

2 files changed, 19 insertions, 0 deletions

diff --git a/markdown/extensions/meta.py b/markdown/extensions/meta.py
index cafad4a..2c2c8e3 100644
--- a/markdown/extensions/meta.py
+++ b/markdown/extensions/meta.py
@@ -36,10 +36,15 @@ class MetaExtension (Extension):
 
     def extendMarkdown(self, md, md_globals):
         """ Add MetaPreprocessor to Markdown instance. """
+        md.registerExtension(self)
+        self.md = md
         md.preprocessors.add("meta",
                              MetaPreprocessor(md),
                              ">normalize_whitespace")
 
+    def reset(self):
+        self.md.Meta = {}
+
 
 class MetaPreprocessor(Preprocessor):
     """ Get Meta-Data. """
diff --git a/tests/test_extensions.py b/tests/test_extensions.py
index aee9bac..35eaf1d 100644
--- a/tests/test_extensions.py
+++ b/tests/test_extensions.py
@@ -454,6 +454,20 @@ The body. This is paragraph one.'''
         self.assertEqual(self.md.convert(text), '')
         self.assertEqual(self.md.Meta, {'title': ['No newline']})
 
+    def testMetaDataReset(self):
+        """ Test that reset call remove Meta entirely """
+
+        text = '''Title: A Test Doc.
+Author: Waylan Limberg
+        John Doe
+Blank_Data:
+
+The body. This is paragraph one.'''
+        self.md.convert(text)
+
+        self.md.reset()
+        self.assertEqual(self.md.Meta, {})
+
 
 class TestWikiLinks(unittest.TestCase):
     """ Test Wikilinks Extension. """