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require File.expand_path('../../../spec_helper', __FILE__)
ruby_version_is "2.3" do
describe 'String#-@' do
it 'returns self if the String is frozen' do
input = 'foo'.freeze
output = -input
output.equal?(input).should == true
output.frozen?.should == true
end
it 'returns a frozen copy if the String is not frozen' do
input = 'foo'
output = -input
output.frozen?.should == true
output.should == 'foo'
end
end
end
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