You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tests.rs
    path of file: ./repos/polkadot/xcm/pallet-xcm/src
    
    the code of the file until where you have to start completion: // Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.

use crate::{
	mock::*, AssetTraps, CurrentMigration, Error, LatestVersionedMultiLocation, Queries,
	QueryStatus, VersionDiscoveryQueue, VersionMigrationStage, VersionNotifiers,
	VersionNotifyTargets,
};
use frame_support::{
	assert_noop, assert_ok,
	traits::{Currency, Hooks},
	weights::Weight,
};
use polkadot_parachain::primitives::Id as ParaId;
use sp_runtime::traits::{AccountIdConversion, BlakeTwo256, Hash};
use xcm::{latest::QueryResponseInfo, prelude::*};
use xcm_builder::AllowKnownQueryResponses;
use xcm_executor::{
	traits::{Properties, QueryHandler, QueryResponseStatus, ShouldExecute},
	XcmExecutor,
};

const ALICE: AccountId = AccountId::new([0u8; 32]);
const BOB: AccountId = AccountId::new([1u8; 32]);
const PARA_ID: u32 = 2000;
const INITIAL_BALANCE: u128 = 100;
const SEND_AMOUNT: u128 = 10;

#[test]
fn report_outcome_notify_works() {
	let balances = vec![
		(ALICE, INITIAL_BALANCE),
		(ParaId::from(PARA_
    
fn auto_subscription_works() {
	new_test_ext_with_balances(vec![]).execute_with(|| {
		let remote_v2: MultiLocation = Parachain(1000).into();
		let remote_v3: MultiLocation = Parachain(1001).into();

		assert_ok!(XcmPallet::force_default_xcm_version(RuntimeOrigin::root(), Some(2)));

		// Wrapping a version for a destination we don't know elicits a subscription.
		let msg_v2 = xcm::v2::Xcm::<()>(vec![xcm::v2::Instruction::Trap(0)]);
		let msg_v3 = xcm::v3::Xcm::<()>(vec![xcm::v3::Instruction::ClearTopic]);
		assert_eq!(
			XcmPallet::wrap_version(&remote_v2, msg_v2.clone()),
			Ok(VersionedXcm::from(msg_v2.clone())),
		);
		assert_eq!(XcmPallet::wrap_version(&remote_v2, msg_v3.clone()), Err(()));

		let expected = vec![(remote_v2.into(), 2)];
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), expected);

		assert_eq!(
			XcmPallet::wrap_version(&remote_v3, msg_v2.clone()),
			Ok(VersionedXcm::from(msg_v2.clone())),
		);
		assert_eq!(XcmPallet::wrap_version(&remote_v3, msg_v3.clone()), Err(()));

		let expected = vec![(remote_v2.into(), 2), (remote_v3.into(), 2)];
		assert_eq!(VersionDiscoveryQueue::<Test>::get().into_inner(), expected);

		XcmPallet::on_initialize(1);
		assert_eq!(
			take_sent_xcm(),
			vec![(
				remote_v3,
				Xcm(vec![SubscribeVersion { query_id: 0, max_response_weight: Weight::zero() }]),
			)]
		);

		// Assume remote_v3 is working ok and XCM version 3.

		let weight = BaseXcmWeight::get();
		let message = Xcm(vec![
			// Remote supports XCM v3
			QueryResponse {
				query_id: 0,
				max_weight: Weight::zero(),
				response: Response::Version(3),
				querier: None,
			},
		]);
		let hash = fake_message_hash(&message);
		let r = XcmExecutor::<XcmConfig>::execute_xcm(remote_v3, message, hash, weight);
		assert_eq!(r, Outcome::Complete(weight));

		// V2 messages can be sent to remote_v3 under XCM v3.
		assert_eq!(
			XcmPallet::wrap_version(&remote_v3, msg_v2.clone()),
			Ok(VersionedXcm::from(msg_v2.clone()).into_version(3).unwrap()),
		);
		// This message can now be sent to remote_v3 as it's v3.
		assert_eq!(
			XcmPallet::wrap_version(&remote_v3, msg_v3.clone()),
			Ok(VersionedXcm::from(msg_v3.clone()))
		);

		XcmPallet::on_initialize(2);
		assert_eq!(
			take_sent_xcm(),
			vec![(
				remote_v2,
				Xcm(vec![SubscribeVersion { query_id: 1, max_response_weight: Weight::zero() }]),
			)]
		);

		// Assume remote_v2 is working ok and XCM version 2.

		let weight = BaseXcmWeight::get();
		let message = Xcm(vec![
			// Remote supports XCM v2
			QueryResponse {
				query_id: 1,
				max_weight: Weight::zero(),
				response: Response::Version(2),
				querier: None,
			},
		]);
		let hash = fake_message_hash(&message);
		let r = XcmExecutor::<XcmConfig>::execute_xcm(remote_v2, message, hash, weight);
		assert_eq!(r, Outcome::Complete(weight));

		// v3 messages cannot be sent to remote_v2...
		assert_eq!(
			XcmPallet::wrap_version(&remote_v2, msg_v2.clone()),
			Ok(VersionedXcm::V2(msg_v2))
		);
		assert_eq!(XcmPallet::wrap_version(&remote_v2, msg_v3.clone()), Err(()));
	})
}