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RSpec.describe Magick::Image, '#view' do
it 'works' do
image = described_class.new(20, 20)
result = image.view(0, 0, 5, 5)
expect(result).to be_instance_of(Magick::Image::View)
image.view(0, 0, 5, 5) { |v| expect(v).to be_instance_of(Magick::Image::View) }
expect { image.view(-1, 0, 5, 5) }.to raise_error(RangeError)
expect { image.view(0, -1, 5, 5) }.to raise_error(RangeError)
expect { image.view(1, 0, image.columns, 5) }.to raise_error(RangeError)
expect { image.view(0, 1, 5, image.rows) }.to raise_error(RangeError)
expect { image.view(0, 0, 0, 1) }.to raise_error(ArgumentError)
expect { image.view(0, 0, 1, 0) }.to raise_error(ArgumentError)
end
end
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