feat: assert last event

[chungquantin]

Asserts that the latest event matches an expected event.

This can be used to assert that an event emitted from the latest contract execution resulted in a specific event.

Example

assert_last_event!(
	&session,
 	Transfer {
 		from: Some(account_id_from_slice(&contract)),
 		to: Some(account_id_from_slice(&BOB)),
 		value,
 	}
);

Parameters:

• session - The session for interacting with contracts.
• event - The expected event.

#[macro_export]
macro_rules! assert_last_event {
	($session:expr, $event:expr $(,)?) => {
		$crate::macros::assert_last_event_inner::<_, _>($session, $event);
	};
}