beet_flow 0.0.8

An ECS control flow library
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use crate::prelude::*;
use beet_core::prelude::*;

/// Convert an [`Outcome::Fail`] into an [`AppExit::error`]
#[action(exit_on_fail)]
#[derive(Debug, Component)]
pub struct ExitOnFail;

fn exit_on_fail(ev: On<Outcome>, mut commands: Commands) {
	match ev.event() {
		Outcome::Pass => {}
		Outcome::Fail => {
			commands.write_message(AppExit::error());
		}
	};
}

#[cfg(test)]
mod test {
	use crate::prelude::*;
	use beet_core::prelude::*;

	#[test]
	fn works() {
		let mut world = World::new();
		world.insert_resource(Messages::<AppExit>::default());
		world
			.spawn((EndWith(Outcome::Fail), ExitOnFail))
			.trigger_target(GetOutcome)
			.flush();

		world.should_exit().unwrap().xpect_eq(AppExit::error());
	}
}