Macro assert_eq_approx 

macro_rules! assert_eq_approx {
    ($actual:expr_2021, $expected:expr_2021, fn = $func:expr_2021 $(,)?) => { ... };
    ($actual:expr_2021, $expected:expr_2021, fn = $func:expr_2021, $($t:tt)+) => { ... };
    ($actual:expr_2021, $expected:expr_2021 $(,)?) => { ... };
    ($actual:expr_2021, $expected:expr_2021, $($t:tt)+) => { ... };
}

Asserts that two values are approximately equal

For comparison, this uses ApproxEq::approx_eq by default, or the provided fn = ... function.