Macro should_error

macro_rules! should_error {
    (
    $(#[$attr:meta])*
    $vis:vis fn $name:ident() -> $ret_ty:ty $body:block
) => { ... };
    (
    $(#[$attr:meta])*
    $vis:vis fn $name:ident() -> $ret_ty:ty $body:block,
    expected = $expected:pat
) => { ... };
    (
    $(#[$attr:meta])*
    $vis:vis fn $name:ident($($arg:ident: $arg_ty:ty,)+) -> $ret_ty:ty $body:block
    $(, expected = $expected:pat)?
) => { ... };
}

Wraps a function that takes nothing and returns a Result, panicking if the result is Ok.

See the crate-level documentation for more information.