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-rw-r--r--test/stringio/test_stringio.rb6
1 files changed, 6 insertions, 0 deletions
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index e443fa6c26..bf3a9eeb1b 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -674,4 +674,10 @@ class TestStringIO < Test::Unit::TestCase
bug_11945 = '[ruby-core:72699] [Bug #11945]'
assert_equal Encoding::ASCII_8BIT, s.external_encoding, bug_11945
end
+
+ def test_new_block_warning
+ assert_warn(/does not take block/) do
+ StringIO.new {}
+ end
+ end
end