1 files changed, 54 insertions, 0 deletions
diff --git a/tests/test_regexlexer.py b/tests/test_regexlexer.py
new file mode 100644
index 00000000..546dfcae
--- /dev/null
+++ b/tests/test_regexlexer.py
@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+"""
+    Pygments regex lexer tests
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    :copyright: Copyright 2006-2014 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import unittest
+
+from pygments.token import Text
+from pygments.lexer import RegexLexer
+from pygments.lexer import bygroups
+from pygments.lexer import default
+
+
+class TestLexer(RegexLexer):
+    """Test tuple state transitions including #pop."""
+    tokens = {
+        'root': [
+            ('a', Text.Root, 'rag'),
+            ('e', Text.Root),
+            default(('beer', 'beer'))
+        ],
+        'beer': [
+            ('d', Text.Beer, ('#pop', '#pop')),
+        ],
+        'rag': [
+            ('b', Text.Rag, '#push'),
+            ('c', Text.Rag, ('#pop', 'beer')),
+        ],
+    }
+
+
+class TupleTransTest(unittest.TestCase):
+    def test(self):
+        lx = TestLexer()
+        toks = list(lx.get_tokens_unprocessed('abcde'))
+        self.assertEqual(toks,
+           [(0, Text.Root, 'a'), (1, Text.Rag, 'b'), (2, Text.Rag, 'c'),
+            (3, Text.Beer, 'd'), (4, Text.Root, 'e')])
+
+    def test_multiline(self):
+        lx = TestLexer()
+        toks = list(lx.get_tokens_unprocessed('a\ne'))
+        self.assertEqual(toks,
+           [(0, Text.Root, 'a'), (1, Text, u'\n'),
+            (2, Text.Root, 'e')])
+
+    def test_default(self):
+        lx = TestLexer()
+        toks = list(lx.get_tokens_unprocessed('d'))
+        self.assertEqual(toks, [(0, Text.Beer, 'd')])