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test_fraction.py
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217 lines (171 loc) · 5.09 KB
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import unittest
from fraction import *
class TestFraction(unittest.TestCase):
def test_init(self):
f = Fraction(1, 2)
self.assertEqual(f.numerator, 1)
self.assertEqual(f.denominator, 2)
f = Fraction(1, -2)
self.assertEqual(f.numerator, -1)
self.assertEqual(f.denominator, 2)
# Exceptions
self.assertRaises(ValueError, Fraction, 1, 0)
def test_expand(self):
f = Fraction(1, 2)
f.expand(5)
self.assertEqual(f, Fraction(5, 10, False, False))
f = Fraction(-1, 2)
f.expand(-1)
self.assertEqual(f, Fraction(1, -2, False, False))
# Exceptions
f = Fraction(1, 2)
self.assertRaises(ValueError, f.expand, 0)
def test_reduce(self):
f = Fraction(5, 10, False, False)
f.reduce(5)
self.assertEqual(f, Fraction(1, 2))
# Exceptions
f = Fraction(1, 2)
self.assertRaises(ValueError, f.reduce, 2)
f = Fraction(1, 2)
self.assertRaises(ValueError, f.reduce, 2.0)
f = Fraction(1, 2)
self.assertRaises(ValueError, f.reduce, 0)
def test_gcd(self):
self.assertEqual(Fraction.gcd(27, 18), 9)
self.assertEqual(Fraction.gcd(5, 10), 5)
self.assertEqual(Fraction.gcd(10, 5), 5)
self.assertEqual(Fraction.gcd(10, 0), 10)
def test_max_reduce(self):
f = Fraction(18, 27, False, False)
f.max_reduce()
self.assertEqual(f, Fraction(2, 3))
f = Fraction(5, 10, False, False)
f.max_reduce()
self.assertEqual(f, Fraction(1, 2))
def test_add_method(self):
f1 = Fraction(5, 2)
f2 = Fraction(3, 2)
self.assertEqual(f1.add(f2), Fraction(4, 1))
self.assertEqual(f1, Fraction(5, 2))
self.assertEqual(f2, Fraction(3, 2))
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f1.add(f2), Fraction(5, 6))
self.assertEqual(f1, Fraction(1, 2))
self.assertEqual(f2, Fraction(1, 3))
def test_add_left(self):
f1 = Fraction(1, 2)
f2 = Fraction(3, 2)
self.assertEqual(f1 + f2, Fraction(2, 1))
self.assertEqual(Fraction(1, 2) + 2, Fraction(5, 2))
def test_add_right(self):
f1 = Fraction(1, 2)
f2 = Fraction(3, 2)
self.assertEqual(f2 + f1, Fraction(2, 1))
self.assertEqual(2 + Fraction(1, 2), Fraction(5, 2))
def test_mul_scalar_method(self):
f = Fraction(1, 3)
s = 2
self.assertEqual(f.multiply_scalar(s), Fraction(2, 3))
self.assertEqual(f, Fraction(1, 3))
f = Fraction(1, 3)
s = 0
self.assertEqual(f.multiply_scalar(s), Fraction(0, 3))
self.assertEqual(f, Fraction(1, 3))
f = Fraction(1, 3)
s = -2
self.assertEqual(f.multiply_scalar(s), Fraction(-2, 3))
self.assertEqual(f, Fraction(1, 3))
# Exceptions
f = Fraction(1, 3)
s = 2.0
self.assertRaises(ValueError, f.multiply_scalar, s)
def test_mul_fraction_method(self):
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f1.multiply_fraction(f2), Fraction(1, 6))
self.assertEqual(f1, Fraction(1, 2))
self.assertEqual(f2, Fraction(1, 3))
def test_mul_left(self):
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f1 * f2, Fraction(1, 6))
f = Fraction(1, 3)
s = 2
self.assertEqual(f * s, Fraction(2, 3))
def test_mul_right(self):
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f2 * f1, Fraction(1, 6))
f = Fraction(1, 3)
s = 2
self.assertEqual(s * f, Fraction(2, 3))
def test_div_fraction_fraction_method(self):
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f1.divide_fraction_fraction(f2), Fraction(3, 2))
self.assertEqual(f1, Fraction(1, 2))
self.assertEqual(f2, Fraction(1, 3))
def test_div_fraction_scalar_method(self):
f = Fraction(1, 2)
s = 3
self.assertEqual(f.divide_fraction_scalar(s), Fraction(1, 6))
self.assertEqual(f, Fraction(1, 2))
# Exceptions
f = Fraction(1, 2)
s = 3.0
self.assertRaises(ValueError, f.divide_fraction_scalar, s)
f = Fraction(1, 2)
s = 0
self.assertRaises(ValueError, f.divide_fraction_scalar, s)
def test_div_scalar_fraction_method(self):
f = Fraction(1, 2)
s = 3
self.assertEqual(f.divide_scalar_fraction(s), Fraction(6, 1))
self.assertEqual(f, Fraction(1, 2))
# Exceptions
f = Fraction(1, 2)
s = 3.0
self.assertRaises(ValueError, f.divide_scalar_fraction, s)
def test_div_left(self):
f1 = Fraction(1, 3)
f2 = Fraction(1, 2)
self.assertEqual(f1 / f2, Fraction(2, 3))
f = Fraction(1, 3)
s = 2
self.assertEqual(f / s, Fraction(1, 6))
def test_div_right(self):
f1 = Fraction(1, 3)
f2 = Fraction(1, 2)
self.assertEqual(f2 / f1, Fraction(3, 2))
f = Fraction(1, 3)
s = 2
self.assertEqual(s / f, Fraction(6, 1))
def test_sub_left(self):
f1 = Fraction(2, 3)
f2 = Fraction(1, 3)
self.assertEqual(f1 - f2, Fraction(1, 3))
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f1 - f2, Fraction(1, 6))
def test_sub_right(self):
f1 = Fraction(2, 3)
f2 = Fraction(1, 3)
self.assertEqual(f2 - f1, Fraction(-1, 3))
f1 = Fraction(1, 2)
f2 = Fraction(1, 3)
self.assertEqual(f2 - f1, Fraction(-1, 6))
def test_fix_sign(self):
f = Fraction(1, 2)
f.fix_sign()
self.assertEqual(f, Fraction(1, 2))
f = Fraction(-1, 2)
f.fix_sign()
self.assertEqual(f, Fraction(-1, 2))
f = Fraction(-1, -2)
f.fix_sign()
self.assertEqual(f, Fraction(1, 2))
f = Fraction(1, -2)
f.fix_sign()
self.assertEqual(f, Fraction(-1, 2))