Module assert_err

Assert for Err(…) items.

These macros help compare Err(…) items, such as ::std::Result::Err or similar.

Assert expression is Err:

• assert_err!(a) ≈ a is Err(_)

Compare Err(…) to another Err(…):

• assert_err_eq!(a, b) ≈ (a ⇒ Err(a1) ⇒ a1) = (b ⇒ Err(b1) ⇒ b1)
• assert_err_ne!(a, b) ≈ (a ⇒ Err(a1) ⇒ a1) ≠ (b ⇒ Err(b1) ⇒ b1)

Compare Err(…) to an expression:

• assert_err_eq_x!(a, expr) ≈ (a ⇒ Err(a1) ⇒ a1) = expr
• assert_err_ne_x!(a, expr) ≈ (a ⇒ Err(a1) ⇒ a1) ≠ expr

Example

use assertables::*;

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

Modules

• assert_err
  Assert expression is Err.
• assert_err_eq
  Assert two expressions are Err and their values are equal.
• assert_err_eq_x
  Assert an expression is Err and its value is equal to an expression.
• assert_err_ne
  Assert two expressions are Err and their values are not equal.
• assert_err_ne_x
  Assert an expression is Err and its value is not equal to an expression.