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RSpec.describe Magick::ImageList, '#composite_layers' do
it 'works' do
image_list = described_class.new(*FILES[0..9])
image_list2 = described_class.new # intersection is 5..9
image_list2 << image_list[5]
image_list2 << image_list[6]
image_list2 << image_list[7]
image_list2 << image_list[8]
image_list2 << image_list[9]
expect { image_list.composite_layers(image_list2) }.not_to raise_error
Magick::CompositeOperator.values do |op|
expect { image_list.composite_layers(image_list2, op) }.not_to raise_error
end
expect { image_list.composite_layers(image_list2, Magick::ModulusAddCompositeOp, 42) }.to raise_error(ArgumentError)
end
end
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