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RSpec.describe Magick::Image, '#paint_transparent' do
it 'works' do
image = described_class.new(20, 20)
result = image.paint_transparent('red')
expect(result).not_to be(nil)
expect(result).to be_instance_of(described_class)
expect(image).not_to be(result)
expect { image.paint_transparent('red', Magick::TransparentAlpha) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', alpha: Magick::TransparentAlpha) }.not_to raise_error
expect { image.paint_transparent('red', wrong: Magick::TransparentAlpha) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', Magick::TransparentAlpha, true) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', true, alpha: Magick::TransparentAlpha) }.not_to raise_error
expect { image.paint_transparent('red', true, wrong: Magick::TransparentAlpha) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', true, alpha: Magick::TransparentAlpha, extra: Magick::TransparentAlpha) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', Magick::TransparentAlpha, true, 50) }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', true, 50, alpha: Magick::TransparentAlpha) }.not_to raise_error
expect { image.paint_transparent('red', true, 50, wrong: Magick::TransparentAlpha) }.to raise_error(ArgumentError)
# Too many arguments
expect { image.paint_transparent('red', true, 50, 50, 50) }.to raise_error(ArgumentError)
# Not enough
expect { image.paint_transparent }.to raise_error(ArgumentError)
expect { image.paint_transparent('red', true, [], alpha: Magick::TransparentAlpha) }.to raise_error(TypeError)
expect { image.paint_transparent(50) }.to raise_error(TypeError)
end
end
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