95 lines
2.6 KiB
Python
95 lines
2.6 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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import unittest
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from pymath.expression import Expression
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from pymath.fraction import Fraction
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from pymath.generic import first_elem
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from pymath.renders import txt_render
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class TestExpression(unittest.TestCase):
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"""Testing functions from pymath.expression"""
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def test_init_from_str(self):
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exp = Expression("2 + 3")
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self.assertEqual(exp.infix_tokens, [2, "+", 3])
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self.assertEqual(exp.postfix_tokens, [2, 3, "+"])
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def test_init_from_exp(self):
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pass
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def test_infix_tokens(self):
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pass
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def test_postfix_tokens(self):
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pass
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def test_str2tokens_big_num(self):
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exp = "123 + 3"
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tok = Expression.str2tokens(exp)
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self.assertEqual(tok, [123, "+", 3])
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def test_str2tokens_beg_minus(self):
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exp = "-123 + 3"
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tok = Expression.str2tokens(exp)
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self.assertEqual(tok, [-123, "+", 3])
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def test_str2tokens_time_lack(self):
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exp = "(-3)(2)"
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tok = Expression.str2tokens(exp)
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self.assertEqual(tok, ["(", -3, ")", "*","(", 2, ")" ])
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def test_str2tokens_time_lack2(self):
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exp = "-3(2)"
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tok = Expression.str2tokens(exp)
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self.assertEqual(tok, [-3, "*","(", 2, ")" ])
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def test_str2tokens_error_float(self):
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exp = "1 + 1.3"
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self.assertRaises(ValueError, Expression.str2tokens, exp)
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def test_str2tokens_error(self):
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exp = "1 + $"
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self.assertRaises(ValueError, Expression.str2tokens, exp)
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def test_doMath(self):
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ops = [\
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{"op": ("+", 1 , 2), "res" : 3}, \
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{"op": ("-", 1 , 2), "res" : -1}, \
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{"op": ("*", 1 , 2), "res" : 2}, \
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{"op": ("/", 1 , 2), "res" : Fraction(1,2)}, \
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{"op": ("^", 1 , 2), "res" : 1}, \
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]
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for op in ops:
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res = first_elem(Expression.doMath(*op["op"]))
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self.assertAlmostEqual(res, op["res"])
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def test_isNumber(self):
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pass
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def test_isOperator(self):
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pass
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def test_simplify_frac(self):
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exp = Expression("1/2 - 4")
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steps = ["[1, 2, '/', 4, '-']", \
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"[< Fraction 1 / 2>, 4, '-']", \
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"[1, 1, '*', 2, 1, '*', '/', 4, 2, '*', 1, 2, '*', '/', '-']", \
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"[1, 8, '-', 2, '/']", \
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'[< Fraction -7 / 2>]']
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self.assertEqual(steps, list(exp.simplify()))
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if __name__ == '__main__':
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unittest.main()
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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