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RSpec.describe Magick::Image, '#dispatch' do
it 'expects exactly 5 or 6 arguments' do
image = described_class.read(IMAGES_DIR + '/Button_0.gif').first
expect { image.dispatch }.to raise_error(ArgumentError)
expect { image.dispatch(0) }.to raise_error(ArgumentError)
expect { image.dispatch(0, 0) }.to raise_error(ArgumentError)
expect { image.dispatch(0, 0, image.columns) }.to raise_error(ArgumentError)
expect do
image.dispatch(0, 0, image.columns, image.rows)
end.to raise_error(ArgumentError)
expect do
image.dispatch(0, 0, 20, 20, 'RGBA', false, false)
end.to raise_error(ArgumentError)
end
end
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