Macro frame_support::assert_ok

macro_rules! assert_ok {
    ($x : expr $(,) ?) => { ... };
    ($x : expr, $y : expr $(,) ?) => { ... };
}

Panic if an expression doesn’t evaluate to Ok.

Used as assert_ok!(expression_to_assert, expected_ok_expression), or assert_ok!(expression_to_assert) which would assert against Ok(()).