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shared_examples_for 'a #freeze method' do
let(:sample_exception) do
begin
object.dup.freeze.instance_variable_set(:@foo, :bar)
rescue => exception
exception
end
end
let(:expected_exception_class) do
# Ruby 1.8 blows up with TypeError Ruby 1.9 with RuntimeError
sample_exception.class
end
let(:expected_exception_message) do
# Ruby 1.8 blows up with a different message than Ruby 1.9
sample_exception.message
end
it_should_behave_like 'an idempotent method'
it 'returns object' do
is_expected.to be(object)
end
it 'prevents future modifications' do
subject
expectation = raise_error(expected_exception_class,expected_exception_message)
expect { object.instance_variable_set(:@foo, :bar) }.to(expectation)
end
describe '#frozen?' do
subject { super().frozen? }
it { is_expected.to be(true) }
end
it 'allows to access attribute' do
expect(subject.name).to eql('John')
end
end
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