def test_inv_price_power(self):
"""
Test for the successful execution of 'inv_price_sigmoid'.
"""
f_i_pow, w_pow, m_pow = 35.19, 3.32, 0.72
inv_p_pow = f_i_pow - np.sign(m_pow) * abs(m_pow)**(1 / w_pow)
self.assertAlmostEqual(inv_p_pow,
inv_price_power(f_i_pow, w_pow, m_pow), 7)
self.assertEqual(f_i_pow, inv_price_power(f_i_pow, w_pow, 0.0))
def test_limit_price_power(self):
"""
Test successful execution of 'limit_price_power' function.
"""
t_pos_pow, pos_pow, f_pow, w_pow, max_pos_pow = 101, 95, 195.70, 3.44, 130
sum_inv_price_pow = sum([
inv_price_power(f_pow, w_pow, j / float(max_pos_pow))
for j in range(abs(pos_pow +
np.sign(t_pos_pow - pos_pow)), abs(t_pos_pow +
1))
])
limit_p_pow = (1 / abs(t_pos_pow - pos_pow)) * sum_inv_price_pow
self.assertAlmostEqual(
limit_p_pow,
limit_price_power(t_pos_pow, pos_pow, f_pow, w_pow, max_pos_pow),
7)