def test_bet_size_power(self):
"""
Tests successful execution of 'bet_size_power'.
"""
x_div, w_param = 0.4, 1.5
m_test = np.sign(x_div) * abs(x_div)**w_param
self.assertAlmostEqual(m_test, bet_size_power(w_param, x_div), 7)
def test_bet_size_power_return_zero(self):
"""
Tests that the function returns zero if the price divergence provided is zero.
"""
self.assertEqual(0.0, bet_size_power(2, 0.0))