RubyLexer: Keep state with nested interpolations

Fixes #1018

1 files changed, 62 insertions, 1 deletions

diff --git a/tests/test_ruby.py b/tests/test_ruby.py
index 8f719d10..8420826e 100644
--- a/tests/test_ruby.py
+++ b/tests/test_ruby.py
@@ -9,7 +9,7 @@
 
 import unittest
 
-from pygments.token import Operator, Number, Text
+from pygments.token import Operator, Number, Text, Token
 from pygments.lexers import RubyLexer
 
 
@@ -50,3 +50,64 @@ class RubyTest(unittest.TestCase):
         ]
         self.assertEqual(tokens, list(self.lexer.get_tokens(fragment)))
 
+    def testInterpolationNestedCurly(self):
+        fragment = (
+            u'"A#{ (3..5).group_by { |x| x/2}.map '
+            u'do |k,v| "#{k}" end.join }" + "Z"\n')
+
+        tokens = [
+            (Token.Literal.String.Double, u'"'),
+            (Token.Literal.String.Double, u'A'),
+            (Token.Literal.String.Interpol, u'#{'),
+            (Token.Text, u' '),
+            (Token.Punctuation, u'('),
+            (Token.Literal.Number.Integer, u'3'),
+            (Token.Operator, u'..'),
+            (Token.Literal.Number.Integer, u'5'),
+            (Token.Punctuation, u')'),
+            (Token.Operator, u'.'),
+            (Token.Name, u'group_by'),
+            (Token.Text, u' '),
+            (Token.Literal.String.Interpol, u'{'),
+            (Token.Text, u' '),
+            (Token.Operator, u'|'),
+            (Token.Name, u'x'),
+            (Token.Operator, u'|'),
+            (Token.Text, u' '),
+            (Token.Name, u'x'),
+            (Token.Operator, u'/'),
+            (Token.Literal.Number.Integer, u'2'),
+            (Token.Literal.String.Interpol, u'}'),
+            (Token.Operator, u'.'),
+            (Token.Name, u'map'),
+            (Token.Text, u' '),
+            (Token.Keyword, u'do'),
+            (Token.Text, u' '),
+            (Token.Operator, u'|'),
+            (Token.Name, u'k'),
+            (Token.Punctuation, u','),
+            (Token.Name, u'v'),
+            (Token.Operator, u'|'),
+            (Token.Text, u' '),
+            (Token.Literal.String.Double, u'"'),
+            (Token.Literal.String.Interpol, u'#{'),
+            (Token.Name, u'k'),
+            (Token.Literal.String.Interpol, u'}'),
+            (Token.Literal.String.Double, u'"'),
+            (Token.Text, u' '),
+            (Token.Keyword, u'end'),
+            (Token.Operator, u'.'),
+            (Token.Name, u'join'),
+            (Token.Text, u' '),
+            (Token.Literal.String.Interpol, u'}'),
+            (Token.Literal.String.Double, u'"'),
+            (Token.Text, u' '),
+            (Token.Operator, u'+'),
+            (Token.Text, u' '),
+            (Token.Literal.String.Double, u'"'),
+            (Token.Literal.String.Double, u'Z'),
+            (Token.Literal.String.Double, u'"'),
+            (Token.Text, u'\n'),
+        ]
+        self.assertEqual(tokens, list(self.lexer.get_tokens(fragment)))
+