RSpec.describe Magick::Image, '#trim' do
  it 'works' do
    # Can't use the default image because it's a solid color
    hat = described_class.read(IMAGES_DIR + '/Flower_Hat.jpg').first

    expect(hat.trim).to be_instance_of(described_class)
    expect(hat.trim(10)).to be_instance_of(described_class)

    expect { hat.trim(10, 10) }.to raise_error(ArgumentError)
  end
end