From 1a16b6ffc2d48b93c730cd6e57fac6a68fa05737 Mon Sep 17 00:00:00 2001
From: Kouhei Yanagita <yanagi@shakenbu.org>
Date: Thu, 27 Jan 2022 14:37:48 +0900
Subject: Make Range#reverse_each raise TypeError if endless

---
 test/ruby/test_range.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index 5e3dbb349e..bda206d766 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -582,6 +582,14 @@ class TestRange < Test::Unit::TestCase
     assert_equal([fmin-2, fmin-3], a)
   end
 
+  def test_reverse_each_for_endless_range
+    assert_raise(TypeError) { (1..).reverse_each {} }
+
+    enum = nil
+    assert_nothing_raised { enum = (1..).reverse_each }
+    assert_raise(TypeError) { enum.each {} }
+  end
+
   def test_reverse_each_for_single_point_range
     fmin = RbConfig::LIMITS['FIXNUM_MIN']
     fmax = RbConfig::LIMITS['FIXNUM_MAX']
-- 
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