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RSpec.describe Magick::ImageList, '#|' 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]
image_list.scene = 7
# The or of these two lists should be the same as image_list
# but not be the *same* image_list
result = image_list | image_list2
expect(result).to be_instance_of(described_class)
expect(image_list).not_to be(result)
expect(image_list2).not_to be(result)
expect(image_list).to eq(result)
# Try or'ing disjoint lists
temp_list = described_class.new(*FILES[10..14])
result = image_list | temp_list
expect(result).to be_instance_of(described_class)
expect(result.length).to eq(15)
expect(result.scene).to eq(7)
expect { image_list | 2 }.to raise_error(ArgumentError)
expect { image_list | [2] }.to raise_error(ArgumentError)
end
end
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