Macro assertables::assertable_io

macro_rules! assertable_io {
    ($x:expr $(,)?) => { ... };
    ($x:expr, $($arg:tt)+) => { ... };
}

Assert a condition is true.

• When true, return Ok(()).

• Otherwise, return Err with a message and the values of the expressions with their debug representations.

Examples

let x = assertable_io!(true);
//-> Ok(())
assert!(x.is_ok());

let x = assertable_io!(false); 
//-> Err(std::io::Error::new(std::io::ErrorKind::InvalidInput, "…");
// assertable failed: `assertable_io(condition) condition: `false`
assert_eq!(
    x.unwrap_err().get_ref().unwrap().to_string(),
    "assertable failed: `assertable_io(condition) condition: `false`"
);

This macro has a second form where a custom message can be provided.