path: root/core/block_cache_test.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package core

import (
    "math/big"
    "testing"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/types"
)

func newChain(size int) (chain []*types.Block) {
    var parentHash common.Hash
    for i := 0; i < size; i++ {
        head := &types.Header{ParentHash: parentHash, Number: big.NewInt(int64(i))}
        block := types.NewBlock(head, nil, nil, nil)
        chain = append(chain, block)
        parentHash = block.Hash()
    }
    return chain
}

func insertChainCache(cache *BlockCache, chain []*types.Block) {
    for _, block := range chain {
        cache.Push(block)
    }
}

func TestNewBlockCache(t *testing.T) {
    chain := newChain(3)
    cache := NewBlockCache(2)
    insertChainCache(cache, chain)

    if cache.hashes[0] != chain[1].Hash() {
        t.Error("oldest block incorrect")
    }
}

func TestInclusion(t *testing.T) {
    chain := newChain(3)
    cache := NewBlockCache(3)
    insertChainCache(cache, chain)

    for _, block := range chain {
        if b := cache.Get(block.Hash()); b == nil {
            t.Errorf("getting %x failed", block.Hash())
        }
    }
}

func TestDeletion(t *testing.T) {
    chain := newChain(3)
    cache := NewBlockCache(3)
    insertChainCache(cache, chain)

    cache.Delete(chain[1].Hash())

    if cache.Has(chain[1].Hash()) {
        t.Errorf("expected %x not to be included")
    }
}