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RSpec.describe Magick::Pixel, '#hash' do
it 'works' do
pixel = described_class.from_color('brown')
hash = nil
expect { hash = pixel.hash }.not_to raise_error
expect(hash).not_to be(nil)
expect(hash).to eq(1_385_502_079)
pixel = described_class.new
expect(pixel.hash).to eq(127)
pixel = described_class.from_color('red')
expect(pixel.hash).to eq(2_139_095_167)
# Pixel.hash sacrifices the last bit of the opacity channel
pixel = described_class.new(0, 0, 0, 72)
pixel2 = described_class.new(0, 0, 0, 73)
expect(pixel2).not_to eq(pixel)
expect(pixel2.hash).to eq(pixel.hash)
end
end
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