Function test_get_w_key_error

crates/openquant/tests/ch10_snippets.rs:293–295

()

#[test]
fn test_inv_price_power() {
    let f_i: f64 = 35.19;
    let w_pow: f64 = 3.32;
    let m_pow: f64 = 0.72;
    let inv_p = f_i - m_pow.signum() * m_pow.abs().powf(1.0 / w_pow);
    let res = inv_price_power(f_i, w_pow, m_pow);
    assert!((res - inv_p).abs() < 1e-7);