tests.rs

	TestExt::new().execute_with(|| {
		let mut cfg = new_config();
		// Good config works:
		assert_ok!(Broker::configure(Root.into(), cfg.clone()));
		// Bad config is a noop:
		cfg.leadin_length = 0;
		assert_noop!(Broker::configure(Root.into(), cfg), Error::<Test>::InvalidConfig);
	});
}