2016-07-06 04:51:11 +00:00
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# External dependencies
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from __future__ import division, absolute_import, print_function
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import unittest
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import numpy as np
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# Internal dependencies
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2023-02-04 00:46:23 +00:00
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from svgpathtools import rational_limit
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2016-07-06 04:51:11 +00:00
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class Test_polytools(unittest.TestCase):
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# def test_poly_roots(self):
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# self.fail()
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def test_rational_limit(self):
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# (3x^3 + x)/(4x^2 - 2x) -> -1/2 as x->0
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f = np.poly1d([3, 0, 1, 0])
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g = np.poly1d([4, -2, 0])
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lim = rational_limit(f, g, 0)
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self.assertAlmostEqual(lim, -0.5)
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# (3x^2)/(4x^2 - 2x) -> 0 as x->0
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f = np.poly1d([3, 0, 0])
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g = np.poly1d([4, -2, 0])
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lim = rational_limit(f, g, 0)
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self.assertAlmostEqual(lim, 0)
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if __name__ == '__main__':
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unittest.main()
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