assert_err_eq_x

assertables

Macro assert_err_eq_x 

Source 
macro_rules! assert_err_eq_x {
    ($a:expr, $b:expr $(,)?) => { ... };
    ($a:expr, $b:expr, $($message:tt)+) => { ... };
}
Expand description

Assert an expression is Err and its value is equal to an expression.

Pseudocode:
(a ⇒ Err(a1) ⇒ a1) = b

  • If true, return a1.

  • Otherwise, call panic! with a message and the values of the expressions with their debug representations.

§Examples

use assertables::*;

let a: Result<i8, i8> = Err(1);
let b: i8 = 1;
assert_err_eq_x!(a, b);

// This will panic
let a: Result<i8, i8> = Err(1);
let b: i8 = 2;
assert_err_eq_x!(a, b);
// assertion failed: `assert_err_eq_x!(a, b)`
// https://docs.rs/assertables/…/assertables/macro.assert_err_eq_x.html
//  a label: `a`,
//  a debug: `Err(1)`,
//  a inner: `1`,
//  b label: `b`,
//  b debug: `2`

§Module macros