def test_later_zerodivision(self):
""" verify ZeroDivisionError is raised when the second Fraction's result is 0 """
with self.assertRaises(ZeroDivisionError):
f34: Fraction = Fraction(3, 4)
f05: Fraction = Fraction(
0, 5) # nominator is 0, no error will be raised
# but this fraction will be the denominator of the first fraction
result = f34 / f05 # Then this division will raise a ZeroDivisionError
def test_gt(self):
""" verify Fraction greater than """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f25: Fraction = Fraction(2, 5)
f24: Fraction = Fraction(2, 4)
self.assertEqual(f12 > f34, False)
self.assertEqual(f24 > f25, True)
def test_eq(self):
""" verify Fraction equation (eq) """
f41: Fraction = Fraction(4, 1)
f34: Fraction = Fraction(3, 4)
f1510: Fraction = Fraction(15, 10)
f128: Fraction = Fraction(12, 8)
self.assertEqual(f41 == f34, False)
self.assertEqual(f1510 == f128, True)
def test_ne(self):
""" verify Fraction equation (ne) """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f48: Fraction = Fraction(4, 8)
f816: Fraction = Fraction(8, 16)
self.assertEqual(f12 != f34, True)
self.assertEqual(f48 != f816, False)
def test_le(self):
""" verify Fraction less than or equal """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f25: Fraction = Fraction(2, 5)
f24: Fraction = Fraction(2, 4)
self.assertEqual(f25 <= f12, True)
self.assertEqual(f12 <= f12, True)
self.assertEqual(f34 <= f24, False)
def test_ge(self):
""" verify Fraction greater than or equal """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f25: Fraction = Fraction(2, 5)
f24: Fraction = Fraction(2, 4)
self.assertEqual(f25 >= f12, False)
self.assertEqual(f12 >= f12, True)
self.assertEqual(f34 >= f24, True)
def test_lt(self):
""" verify Fraction less than """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f25: Fraction = Fraction(2, 5)
f24: Fraction = Fraction(2, 4)
fm13: Fraction = Fraction(-1, 3)
f1m3: Fraction = Fraction(1, -3)
f23: Fraction = Fraction(2, 3)
self.assertEqual(f34 < f12, False)
self.assertEqual(f25 < f24, True)
self.assertEqual(fm13 < f23, True) # test for negative numbers
self.assertEqual(f1m3 < f23, True)
def test_add(self):
""" verify Fraction addition """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
self.assertEqual(f12 + f34, Fraction(10, 8))
self.assertEqual(f12, Fraction(1, 2)) # f12 should not have changed
def test_truediv_3_operands(self):
""" verify Fraction division with more than two operands """
f34: Fraction = Fraction(3, 4)
f55: Fraction = Fraction(5, 5)
f912: Fraction = Fraction(9, 12)
self.assertTrue(f34 / f55 / f912 == Fraction(180, 180))
def test_truediv(self):
""" verify Fraction division """
f32: Fraction = Fraction(3, 2)
f912: Fraction = Fraction(9, 12)
self.assertEqual(f32 / f912, Fraction(36, 18))
self.assertEqual(f32, Fraction(3, 2)) # f32 should not have changed
def test_mul_3_operands(self):
""" verify Fraction multiplication with more than two operands """
f52: Fraction = Fraction(5, 2)
f34: Fraction = Fraction(3, 4)
f68: Fraction = Fraction(6, 8)
self.assertTrue(f52 * f34 * f68 == Fraction(90, 64))
def test_mul(self):
""" verify Fraction multiplication """
f128: Fraction = Fraction(12, 8)
f41: Fraction = Fraction(4, 1)
self.assertEqual(f128 * f41, Fraction(48, 8))
self.assertEqual(f128, Fraction(12, 8)) # f128 should not have changed
def test_sub_3_operands(self):
""" verify Fraction substraction with more than two operands """
f41: Fraction = Fraction(4, 1)
f55: Fraction = Fraction(5, 5)
f32: Fraction = Fraction(3, 2)
self.assertTrue(f41 - f55 - f32 == Fraction(15, 10))
def test_sub(self):
""" verify Fraction substraction """
f44: Fraction = Fraction(4, 4)
f68: Fraction = Fraction(6, 8)
self.assertEqual(f44 - f68, Fraction(8, 32))
self.assertEqual(f44, Fraction(4, 4)) # f44 should not have changed
def test_add_3_operands(self):
""" verify Fraction addition with more than two operands """
f12: Fraction = Fraction(1, 2)
f34: Fraction = Fraction(3, 4)
f44: Fraction = Fraction(4, 4)
self.assertTrue(f12 + f34 + f44 == Fraction(72, 32))
def test_str(self):
""" verify that __str__ works properly """
f: Fraction = Fraction(1, 6)
self.assertEqual(str(f), "1.0/6.0")
def test_init_exception(self):
""" verify that ZeroDivisionError is raised when appropriate """
with self.assertRaises(ZeroDivisionError):
Fraction(
3, 0
) # trying to create a Fraction with 0 denomiator -> ZeroDivisionError
def test_simplify(self):
""" verify Fraction.simplify() method"""
self.assertTrue(
str(Fraction(3, 10).simplify()) == str(Fraction(3, 10)))
self.assertTrue(str(Fraction(9, 27).simplify()) == str(Fraction(1, 3)))
self.assertTrue(str(Fraction(8, 12).simplify()) == str(Fraction(2, 3)))
def test_init(self):
""" verify that the numerator and denominator are set properly """
f: Fraction = Fraction(3, 4)
self.assertEqual(f.num, 3)
self.assertEqual(f.denom, 4)