From afea8db8c7a6bca9042002dd305d45494eb2656f Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 24 Jul 2019 01:42:05 +0900
Subject: [PATCH] Test invalid offset warnings

---
 test/date/test_date_strftime.rb | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/test/date/test_date_strftime.rb b/test/date/test_date_strftime.rb
index dc237a909d..f82874d26d 100644
--- a/test/date/test_date_strftime.rb
+++ b/test/date/test_date_strftime.rb
@@ -186,13 +186,16 @@ class TestDateStrftime < Test::Unit::TestCase
     (-24..24).collect{|x| '%+.2d' % x}.each do |hh|
       %w(00 30).each do |mm|
 	r = hh + mm
-	if r[-4,4] == '2430'
-	  r = '+0000'
-	end
+	next if r.end_with?('2430')
 	d = DateTime.parse(s + hh + mm)
 	assert_equal(r, d.strftime('%z'))
       end
     end
+    %w[+2430 -2430].each do |r|
+      assert_warning(/invalid offset/) do
+        DateTime.parse(s + r)
+      end
+    end
   end
 
   def test_strftime_milli