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// 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 eth

import (
    "math/big"
    "testing"

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

func TestMipmapUpgrade(t *testing.T) {
    db, _ := ethdb.NewMemDatabase()
    addr := common.BytesToAddress([]byte("jeff"))
    genesis := core.WriteGenesisBlockForTesting(db)

    chain, receipts := core.GenerateChain(params.TestChainConfig, genesis, db, 10, func(i int, gen *core.BlockGen) {
        var receipts types.Receipts
        switch i {
        case 1:
            receipt := types.NewReceipt(nil, new(big.Int))
            receipt.Logs = vm.Logs{&vm.Log{Address: addr}}
            gen.AddUncheckedReceipt(receipt)
            receipts = types.Receipts{receipt}
        case 2:
            receipt := types.NewReceipt(nil, new(big.Int))
            receipt.Logs = vm.Logs{&vm.Log{Address: addr}}
            gen.AddUncheckedReceipt(receipt)
            receipts = types.Receipts{receipt}
        }

        // store the receipts
        err := core.WriteReceipts(db, receipts)
        if err != nil {
            t.Fatal(err)
        }
    })
    for i, block := range chain {
        core.WriteBlock(db, block)
        if err := core.WriteCanonicalHash(db, block.Hash(), block.NumberU64()); err != nil {
            t.Fatalf("failed to insert block number: %v", err)
        }
        if err := core.WriteHeadBlockHash(db, block.Hash()); err != nil {
            t.Fatalf("failed to insert block number: %v", err)
        }
        if err := core.WriteBlockReceipts(db, block.Hash(), block.NumberU64(), receipts[i]); err != nil {
            t.Fatal("error writing block receipts:", err)
        }
    }

    err := addMipmapBloomBins(db)
    if err != nil {
        t.Fatal(err)
    }

    bloom := core.GetMipmapBloom(db, 1, core.MIPMapLevels[0])
    if (bloom == types.Bloom{}) {
        t.Error("got empty bloom filter")
    }

    data, _ := db.Get([]byte("setting-mipmap-version"))
    if len(data) == 0 {
        t.Error("setting-mipmap-version not written to database")
    }
}