Mapytex/test/test_polynom.py

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#!/usr/bin/env python
# encoding: utf-8
import unittest
from pymath.polynom import Polynom
from pymath.fraction import Fraction
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from pymath.expression import Expression
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from pymath.render import txt
class TestPolynom(unittest.TestCase):
"""Testing functions from pymath.polynom"""
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def setup(self):
Expression.set_render(txt)
def test_init(self):
p = Polynom([1, 2, 3], "x")
def test_init_multi(self):
p = Polynom([1, [2, 3], 4], "x")
#def test_init_arith(self):
# p = Polynom([1, [2, 3, "+"], 4], "x")
#def test_init_arith_2(self):
# p = Polynom([1, [[2, 3, "*"],3], 4], "x")
def test_deg(self):
pass
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def test_eval_base(self):
p = Polynom([1, 2])
self.assertEqual(p(3).simplify(), 7)
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def test_eval_const(self):
p = Polynom([1])
self.assertEqual(p(3).simplify(), 1)
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def test_eval_const_neg(self):
p = Polynom([-1])
self.assertEqual(p(3).simplify(), -1)
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def test_eval_poly(self):
p = Polynom([1, 2])
hp1 = Expression("h+1")
self.assertEqual(p(hp1).simplify(), Polynom([3,2], "h"))
#def test_print(self):
# p = Polynom([1,2,3])
# ans = "1 + 2 x + 3 x^2"
# self.assertEqual(ans, str(p))
#def test_print_monom(self):
# p = Polynom([0,2])
# ans = "2 x"
# self.assertEqual(ans, str(p))
#def test_print_0_coef(self):
# p = Polynom([0,1,3])
# ans = "x + 3 x^2"
# self.assertEqual(ans, str(p))
#def test_print_multi_coef(self):
# p = Polynom([1,[2, -2],3])
# ans = "1 + 2 x - 2 x + 3 x^2"
# self.assertEqual(ans, str(p))
def test_postfix(self):
p = Polynom([1,2,3])
#ans = [1, 2, "x", "*", "+", 3, "x", 2, "^", "*", "+"]
ans = [3, 'x', 2, '^', '*', 2, 'x', '*', '+', 1, '+']
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_monom(self):
p = Polynom([0,2])
ans = [2, "x", "*"]
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_0_coef(self):
p = Polynom([0,2,0,4])
#ans = [2, "x", "*", 4, "x", 3, "^", "*", "+"]
ans = [4, 'x', 3, '^', '*', 2, 'x', '*', '+']
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_1_coef(self):
p = Polynom([0,1,1])
#ans = ["x", "x", 2, "^", "+"]
ans = ["x", 2, "^", "x", "+"]
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_neg_coef(self):
# TODO: Choix arbitraire (vis à vis des + et des -) il faudra faire en fonction de render |sam. juin 14 09:45:55 CEST 2014
p = Polynom([-1,-2,-3])
#ans = [-1, -2, "x", "*", "+", -3, "x", 2, "^", "*", "+"]
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ans = [3, 'x', 2, '^', '*', '-', 2, 'x', '*', '-', 1, '-']
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_multi_coef(self):
p = Polynom([1,[2, 3],4])
#ans = [1, 2, "x", "*", "+", 3, "x", "*", "+", 4, "x", 2, "^", "*", "+"]
ans = [4, 'x', 2, '^', '*', 2, 'x', '*', '+', 3, 'x', '*', '+', 1, '+']
self.assertEqual(ans, p.postfix_tokens)
def test_postfix_arithm_coef(self):
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p = Polynom([1,Expression([2, 3, "+"]),4])
#ans = [1, 2, 3, "+", "x", "*", "+", 4, "x", 2, "^", "*", "+"]
ans = [4, 'x', 2, '^', '*', 2, 3, '+', 'x', '*', '+', 1, '+']
self.assertEqual(ans, p.postfix_tokens)
def test_reduce_nilpo(self):
p = Polynom([1, 2, 3])
self.assertEqual(p, p.reduce())
def test_reduce(self):
p = Polynom([1, [2, 3], 4])
ans = '4 x^{ 2 } + 5 x + 1'
self.assertEqual(str(p.reduce()), ans)
def test_add_int(self):
p = Polynom([1, 2, 3])
q = p + 2
ans = '3 x^{ 2 } + 2 x + 3'
self.assertEqual(str(q), ans)
def test_add_frac(self):
p = Polynom([1, 2, 3])
f = Fraction(1, 2)
q = p + f
ans = '3 x^{ 2 } + 2 x + \\frac{ 3 }{ 2 }'
self.assertEqual(str(q),ans)
def test_add_poly(self):
p = Polynom([1, 0, 3])
q = Polynom([0, 2, 3])
r = p + q
ans = '6 x^{ 2 } + 2 x + 1'
self.assertEqual(str(r), ans)
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def test_sub_int(self):
p = Polynom([1, 2, 3])
q = p - 2
ans = '3 x^{ 2 } + 2 x - 1'
self.assertEqual(str(q),ans )
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def test_sub_frac(self):
p = Polynom([1, 2, 3])
f = Fraction(1, 2)
q = p - f
ans = '3 x^{ 2 } + 2 x + \\frac{ 1 }{ 2 }'
self.assertEqual(str(q), ans)
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def test_sub_poly(self):
p = Polynom([1, 0, 2])
q = Polynom([0, 2, 3])
r = p - q
ans = '- x^{ 2 } - 2 x + 1'
self.assertEqual(str(r), ans)
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def test_pow_monome(self):
p = Polynom([0,-2])
r = p**3
ans = '- 8 x^{ 3 }'
self.assertEqual(str(r), ans)
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def test_pow2_monome(self):
p = Polynom([0,-2])
r = p^3
ans = '- 8 x^{ 3 }'
self.assertEqual(str(r), ans)
if __name__ == '__main__':
unittest.main()
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