From d9d8ca0b8f70415d4d35a2e86929de8f6b9feeeb Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 6 Jul 2017 04:12:51 +0000
Subject: lexer.rb: ignore dedented space

* ext/ripper/lib/ripper/lexer.rb (on_heredoc_dedent): replace an
  empty string content because of dedentation with :on_ignored_sp.
  an empty token makes the sorted order unstable.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ripper/test_lexer.rb | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'test/ripper')

diff --git a/test/ripper/test_lexer.rb b/test/ripper/test_lexer.rb
index 72b7f1b5fd..30e5d78884 100644
--- a/test/ripper/test_lexer.rb
+++ b/test/ripper/test_lexer.rb
@@ -32,4 +32,23 @@ class TestRipper::Lexer < Test::Unit::TestCase
     E
     assert_equal(str, Ripper.tokenize(str).join(""), bug)
   end
+
+  def test_embedded_expr_in_heredoc
+    src = <<~'E'
+    <<~B
+      #{1}
+    B
+    E
+    expect = %I[
+      on_heredoc_beg
+      on_nl
+      on_ignored_sp
+      on_embexpr_beg
+      on_int
+      on_embexpr_end
+      on_tstring_content
+      on_heredoc_end
+    ]
+    assert_equal expect, Ripper.lex(src).map {|e| e[1]}
+  end
 end
-- 
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