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-rw-r--r--spec/ruby/library/tempfile/initialize_spec.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/spec/ruby/library/tempfile/initialize_spec.rb b/spec/ruby/library/tempfile/initialize_spec.rb
index ad3c2f6437..3b20e8ad4b 100644
--- a/spec/ruby/library/tempfile/initialize_spec.rb
+++ b/spec/ruby/library/tempfile/initialize_spec.rb
@@ -38,4 +38,9 @@ describe "Tempfile#initialize" do
@tempfile.send(:initialize, ['shiftjis', 'yml'], encoding: 'SHIFT_JIS')
@tempfile.external_encoding.should == Encoding::Shift_JIS
end
+
+ it "does not try to modify the arguments" do
+ @tempfile.send(:initialize, ['frozen'.freeze, 'txt'.freeze], encoding: Encoding::IBM437)
+ @tempfile.external_encoding.should == Encoding::IBM437
+ end
end