91 lines
2.4 KiB
Python
91 lines
2.4 KiB
Python
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
|
|
|
|
|
|
import unittest
|
|
|
|
from pymath.expression import Expression
|
|
from pymath.fraction import Fraction
|
|
from pymath.generic import first_elem
|
|
from pymath.renders import txt_render
|
|
|
|
|
|
class TestExpression(unittest.TestCase):
|
|
"""Testing functions from pymath.expression"""
|
|
|
|
def test_init_from_str(self):
|
|
exp = Expression("2 + 3")
|
|
self.assertEqual(exp.infix_tokens, [2, "+", 3])
|
|
self.assertEqual(exp.postfix_tokens, [2, 3, "+"])
|
|
|
|
def test_init_from_exp(self):
|
|
pass
|
|
|
|
def test_infix_tokens(self):
|
|
pass
|
|
|
|
def test_postfix_tokens(self):
|
|
pass
|
|
|
|
def test_str2tokens_big_num(self):
|
|
exp = "123 + 3"
|
|
tok = Expression.str2tokens(exp)
|
|
self.assertEqual(tok, [123, "+", 3])
|
|
|
|
def test_str2tokens_beg_minus(self):
|
|
exp = "-123 + 3"
|
|
tok = Expression.str2tokens(exp)
|
|
self.assertEqual(tok, [-123, "+", 3])
|
|
|
|
def test_str2tokens_time_lack(self):
|
|
exp = "(-3)(2)"
|
|
tok = Expression.str2tokens(exp)
|
|
self.assertEqual(tok, ["(", -3, ")", "*","(", 2, ")" ])
|
|
|
|
def test_str2tokens_time_lack2(self):
|
|
exp = "-3(2)"
|
|
tok = Expression.str2tokens(exp)
|
|
self.assertEqual(tok, [-3, "*","(", 2, ")" ])
|
|
|
|
def test_str2tokens_error(self):
|
|
exp = "1 + $"
|
|
self.assertRaises(ValueError, Expression.str2tokens, exp)
|
|
|
|
def test_doMath(self):
|
|
ops = [\
|
|
{"op": ("+", 1 , 2), "res" : 3}, \
|
|
{"op": ("-", 1 , 2), "res" : -1}, \
|
|
{"op": ("*", 1 , 2), "res" : 2}, \
|
|
{"op": ("/", 1 , 2), "res" : Fraction(1,2)}, \
|
|
{"op": ("^", 1 , 2), "res" : 1}, \
|
|
]
|
|
for op in ops:
|
|
res = first_elem(Expression.doMath(*op["op"]))
|
|
self.assertAlmostEqual(res, op["res"])
|
|
|
|
def test_isNumber(self):
|
|
pass
|
|
|
|
def test_isOperator(self):
|
|
pass
|
|
|
|
def test_simplify_frac(self):
|
|
exp = Expression("1/2 - 4")
|
|
steps = ["[1, 2, '/', 4, '-']", \
|
|
"[< Fraction 1 / 2>, 4, '-']", \
|
|
"[1, 1, '*', 2, 1, '*', '/', 4, 2, '*', 1, 2, '*', '/', '-']", \
|
|
"[1, 8, '-', 2, '/']", \
|
|
'[< Fraction -7 / 2>]']
|
|
self.assertEqual(steps, list(exp.simplify()))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|
|
|
|
|
|
# -----------------------------
|
|
# Reglages pour 'vim'
|
|
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
|
|
# cursor: 16 del
|