From b75f68ab8d54f2c4f85a71fe129074ecb554d53a Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 13 Mar 2017 09:29:19 +0000
Subject: file.c: join with /

* file.c (rb_file_join): join using "/" always, not a constant.
  and fix the document.  [ruby-core:79579] [Bug #13223]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_file_exhaustive.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'test/ruby/test_file_exhaustive.rb')

diff --git a/test/ruby/test_file_exhaustive.rb b/test/ruby/test_file_exhaustive.rb
index 49e695fc75..229104050b 100644
--- a/test/ruby/test_file_exhaustive.rb
+++ b/test/ruby/test_file_exhaustive.rb
@@ -1260,6 +1260,19 @@ class TestFileExhaustive < Test::Unit::TestCase
     assert_raise(Encoding::CompatibilityError, bug7168) {File.join(names)}
   end
 
+  def test_join_with_changed_separator
+    assert_separately([], "#{<<~"begin;"}\n#{<<~"end;"}")
+    bug = '[ruby-core:79579] [Bug #13223]'
+    begin;
+      class File
+        remove_const :Separator
+        remove_const :SEPARATOR
+      end
+      GC.start
+      assert_equal("hello/world", File.join("hello", "world"), bug)
+    end;
+  end
+
   def test_truncate
     [regular_file, utf8_file].each do |file|
       assert_equal(0, File.truncate(file, 1))
-- 
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