md_tw.py: Add TWBlockLexer.parse_hrule.

* md_tw.py
(TWBlockLexer.parse_hrule): New method
* tests/test_md_tw.py
(TestTWBlockLexer.test_parse_hrule): New test.
* tests/data/blexer-hrules.md: New file.

2 files changed, 32 insertions, 0 deletions

diff --git a/tests/data/blexer-hrules.md b/tests/data/blexer-hrules.md
new file mode 100644
index 0000000..2b2bc24
--- /dev/null
+++ b/tests/data/blexer-hrules.md
@@ -0,0 +1,19 @@
+* * *
+
+Dresden Dolls
+
+***
+
+God Damn The Sun
+
+*****
+
+Backstabber
+
+- - -
+
+Sorry Bunch
+
+---------------------------------------
+
+Gravity
diff --git a/tests/test_md_tw.py b/tests/test_md_tw.py
index a71c191..da7981c 100644
--- a/tests/test_md_tw.py
+++ b/tests/test_md_tw.py
@@ -90,6 +90,19 @@ class TestTWBlockLexer(object):
 
         self._validate(tokens, 'heading', expected_lhs)
 
+    def test_parse_hrule(self):
+        tokens = self._parse('blexer-hrules.md')
+
+        expected_hrs = [
+            '* * *\n\n',
+            '***\n\n',
+            '*****\n\n',
+            '- - -\n\n',
+            '---------------------------------------\n\n'
+            ]
+
+        self._validate(tokens, 'hrule', expected_hrs)
+
     def teardown(self):
         pass