Macro test_should_panic 

macro_rules! test_should_panic {
    ($func_name:ident, $func:expr) => { ... };
    ($func_name:ident, $message:literal, $func:expr) => { ... };
}

Test to see if it panics as expected.

The first argument should be the test case name, and the second argument should be the function or macro which is expected to panic internally.

Example

test_macro::test_should_panic!(test_case_name, panic!());

fn panic() {
    panic!();
}

test_macro::test_should_panic!(test_case_name, panic());

Expected error message can be tested.

test_macro::test_should_panic!(test_case_name, "expected error message", panic("{}", String::from("expected error message")));