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RSpec.describe Magick::Image, '#shadow' do
it 'works' do
image = described_class.new(20, 20)
result = image.shadow
expect(result).to be_instance_of(described_class)
expect { image.shadow(5) }.not_to raise_error
expect { image.shadow(5, 5) }.not_to raise_error
expect { image.shadow(5, 5, 3.0) }.not_to raise_error
expect { image.shadow(5, 5, 3.0, 0.50) }.not_to raise_error
expect { image.shadow(5, 5, 3.0, '50%') }.not_to raise_error
expect { image.shadow(5, 5, 3.0, 0.50, 2) }.to raise_error(ArgumentError)
expect { image.shadow('x') }.to raise_error(TypeError)
expect { image.shadow(5, 'x') }.to raise_error(TypeError)
expect { image.shadow(5, 5, 'x') }.to raise_error(TypeError)
expect { image.shadow(5, 5, 3.0, 'x') }.to raise_error(ArgumentError)
end
end
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