Macro assertables::assert_result_err

macro_rules! assert_result_err {
    ($a:expr $(,)?) => { ... };
    ($a:expr, $($message:tt)+) => { ... };
}

👎Deprecated: Please rename from assert_result_err to assert_err because more developers prefer the shorter name.

Assert expression is Err(_).

• If true, return ().

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

Examples

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

let a: Result<(), i8> = Ok(());
assert_result_err!(a);
// assertion failed: `assert_result_err!(a)`
// https://docs.rs/assertables/8.7.0/assertables/macro.assert_result_err.html
//  a label: `a`,
//  a debug: `Ok(())`

Module macros

• assert_result_err
• assert_result_err_as_result
• debug_assert_result_err