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RSpec.describe Magick::Image, '#dispose' do
it 'works' do
image = described_class.new(100, 100)
expect { image.dispose }.not_to raise_error
expect(image.dispose).to be_instance_of(Magick::DisposeType)
expect(image.dispose).to eq(Magick::UndefinedDispose)
expect { image.dispose = Magick::NoneDispose }.not_to raise_error
expect(image.dispose).to eq(Magick::NoneDispose)
Magick::DisposeType.values do |dispose|
expect { image.dispose = dispose }.not_to raise_error
end
expect { image.dispose = 2 }.to raise_error(TypeError)
end
end
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