openethereum/ethcore/src/tests/blockchain.rs

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// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.
// Parity Ethereum 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.
// Parity Ethereum 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 Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
use blockchain::BlockProvider;
use test_helpers::{
generate_dummy_blockchain,
generate_dummy_blockchain_with_extra,
generate_dummy_empty_blockchain,
};
#[test]
fn can_contain_arbitrary_block_sequence() {
let bc = generate_dummy_blockchain(50);
assert_eq!(bc.best_block_number(), 49);
}
#[test]
fn can_collect_garbage() {
let bc = generate_dummy_blockchain(3000);
assert_eq!(bc.best_block_number(), 2999);
let best_hash = bc.best_block_hash();
let mut block_header = bc.block_header_data(&best_hash);
while !block_header.is_none() {
block_header = bc.block_header_data(&block_header.unwrap().parent_hash());
}
assert!(bc.cache_size().blocks > 1024 * 1024);
for _ in 0..2 {
bc.collect_garbage();
}
assert!(bc.cache_size().blocks < 1024 * 1024);
}
#[test]
fn can_contain_arbitrary_block_sequence_with_extra() {
let bc = generate_dummy_blockchain_with_extra(25);
assert_eq!(bc.best_block_number(), 24);
}
#[test]
fn can_contain_only_genesis_block() {
let bc = generate_dummy_empty_blockchain();
assert_eq!(bc.best_block_number(), 0);
}