md_tw.py: Add `TWBlockLexer.parse_block_code`.

* md_tw.py
(TWBlockLexer.parse_block_code): New method.
* tests/test_md_tw.py
(TestTWBlockLexer._parse)
(TestTWBlockLexer._validate): New private methods.
(TestTWBlockLexer.test_parse_block_code): New test.
* tests/data/blexer-block-code.md: New file.

1 files changed, 7 insertions, 0 deletions

diff --git a/md_tw.py b/md_tw.py
index 6c73903..7cb203b 100644
--- a/md_tw.py
+++ b/md_tw.py
@@ -38,6 +38,13 @@ class TWBlockLexer(mistune.BlockLexer):
         key = mistune.escape(key.lower(), quote=True)
         return self._key_pattern.sub(' ', key)
 
+    def parse_block_code(self, m):
+        self.tokens.append({
+            'type': 'code',
+            'lang': None,
+            'text': m.group(0),
+        })
+
 
 class TWInlineLexer(mistune.InlineLexer):
     """Text Wrap Inline level lexer for inline gramars."""