fractions/run_test.py at master · mds-python/fractions · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
import unittest

from fraction import Fraction


class TestFraction(unittest.TestCase):

    def test_str(self):
        val = Fraction(1, 2)
        self.assertEqual('1/2', str(val))

    def test_sanitization(self):
        val = Fraction(3, -6)
        self.assertEqual(Fraction(-1, 2).__dict__, val.__dict__)

    def test_add(self):
        a = Fraction(1, 3)
        b = Fraction(3, 4)
        self.assertEqual(Fraction(13, 12), a + b)

    def test_sub(self):
        a = Fraction(1, 3)
        b = Fraction(1, 4)
        self.assertEqual(Fraction(1, 12), a - b)

    def test_mul(self):
        a = Fraction(1, 3)
        b = Fraction(3, 5)
        self.assertEqual(Fraction(1, 5), a * b)

    def test_truediv(self):
        a = Fraction(1, 3)
        b = Fraction(3, 4)
        self.assertEqual(Fraction(4, 9), a / b)

    def test_decimal(self):
        frac = Fraction(1, 2)
        if isinstance(Fraction.decimal, property):
            self.assertEqual(0.5, frac.decimal)
        else:
            self.assertEqual(0.5, frac.decimal())

    def test_zero_denumerator(self):
        with self.assertRaises(ValueError):
            Fraction(1, 0)

    def test_non_integer(self):
        with self.assertRaises((ValueError, TypeError)):
            Fraction(1.5, 2)
        with self.assertRaises((ValueError, TypeError)):
            Fraction(1, 2.5)