Macro assertables::assertable_read_to_string_lt

macro_rules! assertable_read_to_string_lt {
    ($left:expr, $right:expr $(,)?) => { ... };
    ($left:expr, $right:expr, $($arg:tt)+) => { ... };
}

Assert one std::io::Read read_to_string() value is less than another.

• When true, return Ok(()).

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

Examples

use std::io::Read;
let mut a = "a".as_bytes();
let mut b = "b".as_bytes();
let x = assertable_read_to_string_lt!(a, b);
//-> Ok(())
assert_eq!(x.unwrap(), ());

let mut a = "a".as_bytes();
let mut b = "b".as_bytes();
let x = assertable_read_to_string_lt!(b, a);
//-> Err("…")
// assertable failed: `assertable_read_to_string_lt!(left, right)`
//   left: `\"b\"`,
//  right: `\"a\"`
assert_eq!(x.unwrap_err(), "assertable failed: `assertable_read_to_string_lt!(left, right)`\n  left: `\"b\"`,\n right: `\"a\"`".to_string());

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