File: excerpt_spec.rb

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RSpec.describe Magick::Image, '#excerpt' do
  it 'works' do
    image1 = described_class.new(20, 20)
    image2 = described_class.new(200, 200)

    result = image1.excerpt(20, 20, 50, 100)
    expect(result).not_to be(image2)
    expect(result.columns).to eq(50)
    expect(result.rows).to eq(100)

    image2.excerpt!(20, 20, 50, 100)
    expect(image2.columns).to eq(50)
    expect(image2.rows).to eq(100)
  end
end