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#!/usr/bin/env python3
# © Copyright 2021-2022, Scott Gasch
"""rate unittest."""
import unittest
import unittest_utils as uu
from type.money import Money
from type.rate import Rate
class TestRate(unittest.TestCase):
def test_basic_utility(self):
my_stock_returns = Rate(percent_change=-20.0)
my_portfolio = 1000.0
self.assertAlmostEqual(800.0, my_stock_returns.apply_to(my_portfolio))
my_bond_returns = Rate(percentage=104.5)
my_money = Money(500.0)
self.assertAlmostEqual(Money(522.5), my_bond_returns.apply_to(my_money))
my_multiplier = Rate(multiplier=1.72)
my_nose_length = 3.2
self.assertAlmostEqual(5.504, my_multiplier.apply_to(my_nose_length))
def test_conversions(self):
x = Rate(104.55)
s = x.__repr__()
y = Rate(s)
self.assertAlmostEqual(x, y)
f = float(x)
z = Rate(f)
self.assertAlmostEqual(x, z)
def test_divide(self):
x = Rate(20.0)
x /= 2
self.assertAlmostEqual(10.0, x)
x = Rate(-20.0)
x /= 2
self.assertAlmostEqual(-10.0, x)
def test_add(self):
x = Rate(5.0)
y = Rate(10.0)
z = x + y
self.assertAlmostEqual(15.0, z)
x = Rate(-5.0)
x += y
self.assertAlmostEqual(5.0, x)
def test_sub(self):
x = Rate(5.0)
y = Rate(10.0)
z = x - y
self.assertAlmostEqual(-5.0, z)
z = y - x
self.assertAlmostEqual(5.0, z)
def test_repr(self):
x = Rate(percent_change=-50.0)
s = x.__repr__(relative=True)
self.assertEqual("-50.000%", s)
s = x.__repr__()
self.assertEqual("+50.000%", s)
if __name__ == '__main__':
unittest.main()
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