mod.rs

			querier: None,
		};
		let instr2 = QueryResponse {
			query_id: 71,
			max_weight: Weight::zero(),
			response: Response::Version(3),
			querier: None,
		};
		let instr3 = QueryResponse {
			query_id: 72,
			max_weight: Weight::zero(),
			response: Response::Version(3),
			querier: None,
		};
		let mut sent = take_sent_xcm();
		sent.sort_by_key(|k| match (k.1).0[0] {
			QueryResponse { query_id: q, .. } => q,
			_ => 0,
		});
		assert_eq!(
			sent,
			vec![
				(Parachain(1001).into(), Xcm(vec![instr1])),
				(Parachain(1002).into(), Xcm(vec![instr2])),
				(Parachain(1003).into(), Xcm(vec![instr3])),
			]
		);

		let mut contents = VersionNotifyTargets::<Test>::iter().collect::<Vec<_>>();
		contents.sort_by_key(|k| k.2 .0);
		assert_eq!(
			contents,
			vec![
				(XCM_VERSION, Parachain(1001).into_versioned(), (70, Weight::zero(), 3)),
				(XCM_VERSION, Parachain(1002).into_versioned(), (71, Weight::zero(), 3)),
				(XCM_VERSION, Parachain(1003).into_versioned(), (72, Weight::zero(), 3)),
			]
		);
	});
}

#[test]
fn get_and_wrap_version_works() {
	new_test_ext_with_balances_and_xcm_version(vec![], None).execute_with(|| {
		let remote_a: Location = Parachain(1000).into();
		let remote_b: Location = Parachain(1001).into();
		let remote_c: Location = Parachain(1002).into();

		// no `safe_xcm_version` version at `GenesisConfig`
		assert_eq!(XcmPallet::get_version_for(&remote_a), None);
		assert_eq!(XcmPallet::get_version_for(&remote_b), None);
		assert_eq!(XcmPallet::get_version_for(&remote_c), None);
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), vec![]);

		// set default XCM version (a.k.a. `safe_xcm_version`)
		assert_ok!(XcmPallet::force_default_xcm_version(RuntimeOrigin::root(), Some(1)));
		assert_eq!(XcmPallet::get_version_for(&remote_a), None);
		assert_eq!(XcmPallet::get_version_for(&remote_b), None);
		assert_eq!(XcmPallet::get_version_for(&remote_c), None);
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), vec![]);

		// set XCM version only for `remote_a`
		assert_ok!(XcmPallet::force_xcm_version(
			RuntimeOrigin::root(),
			Box::new(remote_a.clone()),
			XCM_VERSION
		));
		assert_eq!(XcmPallet::get_version_for(&remote_a), Some(XCM_VERSION));
		assert_eq!(XcmPallet::get_version_for(&remote_b), None);
		assert_eq!(XcmPallet::get_version_for(&remote_c), None);
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), vec![]);

		let xcm = Xcm::<()>::default();

		// wrap version - works because remote_a has `XCM_VERSION`
		assert_eq!(
			XcmPallet::wrap_version(&remote_a, xcm.clone()),
			Ok(VersionedXcm::from(xcm.clone()))
		);
		// does not work because remote_b has unknown version and default is set to 1, and
		// `XCM_VERSION` cannot be wrapped to the `1`
		assert_eq!(XcmPallet::wrap_version(&remote_b, xcm.clone()), Err(()));
		assert_eq!(
			VersionDiscoveryQueue::<Test>::get().into_inner(),
			vec![(remote_b.clone().into(), 1)]
		);

		// set default to the `XCM_VERSION`
		assert_ok!(XcmPallet::force_default_xcm_version(RuntimeOrigin::root(), Some(XCM_VERSION)));
		assert_eq!(XcmPallet::get_version_for(&remote_b), None);
		assert_eq!(XcmPallet::get_version_for(&remote_c), None);

		// now works, because default is `XCM_VERSION`
		assert_eq!(
			XcmPallet::wrap_version(&remote_b, xcm.clone()),
			Ok(VersionedXcm::from(xcm.clone()))
		);
		assert_eq!(
			VersionDiscoveryQueue::<Test>::get().into_inner(),
			vec![(remote_b.clone().into(), 2)]
		);

		// change remote_c to `1`
		assert_ok!(XcmPallet::force_xcm_version(
			RuntimeOrigin::root(),
			Box::new(remote_c.clone()),
			1
		));

		// does not work because remote_c has `1` and default is `XCM_VERSION` which cannot be
		// wrapped to the `1`
		assert_eq!(XcmPallet::wrap_version(&remote_c, xcm.clone()), Err(()));
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), vec![(remote_b.into(), 2)]);
	})
}