Function check_selector_coverage 

pub fn check_selector_coverage<P: Precompile>(
    precompile: &mut P,
    selectors: &[[u8; 4]],
    interface_name: &str,
    name_lookup: impl Fn([u8; 4]) -> Option<&'static str>,
) -> Vec<([u8; 4], &'static str)>

Available on crate features test-utils only.

Checks that all selectors in an interface have dispatch handlers.

Calls each selector with dummy parameters and checks for “Unknown function selector” errors. Returns unsupported selectors as (selector_bytes, function_name) tuples.