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-rw-r--r--spec/ruby/library/stringio/set_encoding_spec.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/set_encoding_spec.rb b/spec/ruby/library/stringio/set_encoding_spec.rb
index 21d45750f3..19ca0875bf 100644
--- a/spec/ruby/library/stringio/set_encoding_spec.rb
+++ b/spec/ruby/library/stringio/set_encoding_spec.rb
@@ -17,4 +17,12 @@ describe "StringIO#set_encoding" do
io.set_encoding Encoding::UTF_8
io.string.encoding.should == Encoding::US_ASCII
end
+
+ it "accepts a String" do
+ str = "".encode(Encoding::US_ASCII)
+ io = StringIO.new(str)
+ io.set_encoding("ASCII-8BIT")
+ io.external_encoding.should == Encoding::BINARY
+ str.encoding.should == Encoding::BINARY
+ end
end