From d249b047c234879ca70e036f5fd686c2a893af94 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 26 Apr 2017 20:13:07 +0000
Subject: error.c: send as a single string

* error.c (rb_warn_m): send the arguments as a single string
  concatenated with a newline, so it can be filtered easily.
  [ruby-core:80875] [Feature #12944]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58490 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_exception.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 8a8edd2ff2..e53569c158 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -973,6 +973,10 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
   def test_warning_warn
     warning = capture_warning_warn {@a}
     assert_match(/instance variable @a not initialized/, warning[0])
+
+    assert_equal(["a\nz\n"], capture_warning_warn {warn "a\n", "z"})
+    assert_equal([],         capture_warning_warn {warn})
+    assert_equal(["\n"],     capture_warning_warn {warn ""})
   end
 
   def test_warning_warn_invalid_argument
-- 
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