1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index ed82d7787f..a8a88640bd 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -211,6 +211,14 @@ class TestEnumerable < Test::Unit::TestCase
     a = []
     @obj.zip([:a, :b, :c]) {|x,y| a << [x, y] }
     assert_equal([[1,:a],[2,:b],[3,:c],[1,nil],[2,nil]], a)
+
+    ary = Object.new
+    def ary.to_a;   [1, 2]; end
+    assert_raise(NoMethodError){ %w(a b).zip(ary) }
+    def ary.each; [3, 4].each{|e|yield e}; end
+    assert_equal([[1, 3], [2, 4], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
+    def ary.to_ary; [5, 6]; end
+    assert_equal([[1, 5], [2, 6], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
   end
 
   def test_take