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RSpec.describe Magick::Draw, '#kerning' do
it 'accepts a valid parameter without raising an error' do
draw = described_class.new
expect { draw.kerning(1) }.not_to raise_error
end
it 'raises an error when given an invalid parameter' do
draw = described_class.new
expect { draw.kerning('a') }.to raise_error(ArgumentError)
expect { draw.kerning([]) }.to raise_error(TypeError)
end
it 'works' do
draw = described_class.new
image = Magick::Image.new(200, 200)
draw.kerning(40.5)
expect(draw.inspect).to eq('kerning 40.5')
expect { draw.draw(image) }.not_to raise_error
draw = described_class.new
draw.kerning('40.5')
expect(draw.inspect).to eq('kerning 40.5')
expect { draw.draw(image) }.not_to raise_error
draw = described_class.new
draw.kerning(1/4r)
expect(draw.inspect).to eq('kerning 0.25')
expect { draw.draw(image) }.not_to raise_error
# expect { draw.kerning(Float::NAN) }.to raise_error(ArgumentError)
expect { draw.kerning('nan') }.to raise_error(ArgumentError)
expect { draw.kerning('xxx') }.to raise_error(ArgumentError)
expect { draw.kerning(nil) }.to raise_error(TypeError)
end
end
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