svgpathtoolss/test/test_polytools.py

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