// Copyright 2017-2018 Parity Technologies (UK) Ltd.
// This file is part of Substrate.

// Substrate 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.

// Substrate 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 Substrate.  If not, see <http://www.gnu.org/licenses/>.

//! Tests for the generic implementations of Extrinsic/Header/Block.

use crate::codec::{Decode, Encode};
use substrate_primitives::H256;
use super::DigestItem;

#[test]
fn system_digest_item_encoding() {
	let item = DigestItem::AuthoritiesChange::<H256, u32>(vec![10, 20, 30]);
	let encoded = item.encode();
	assert_eq!(encoded, vec![
		// type = DigestItemType::AuthoritiesChange
		1,
		// number of items in athorities set
		12,
		// authorities
		10, 0, 0, 0,
		20, 0, 0, 0,
		30, 0, 0, 0,
	]);

	let decoded: DigestItem<H256, u32> = Decode::decode(&mut &encoded[..]).unwrap();
	assert_eq!(item, decoded);
}

#[test]
fn non_system_digest_item_encoding() {
	let item = DigestItem::Other::<H256, u32>(vec![10, 20, 30]);
	let encoded = item.encode();
	assert_eq!(encoded, vec![
		// type = DigestItemType::Other
		0,
		// length of other data
		12,
		// authorities
		10, 20, 30,
	]);

	let decoded: DigestItem<H256, u32> = Decode::decode(&mut &encoded[..]).unwrap();
	assert_eq!(item, decoded);
}
