// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-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.
//
// go-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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
)
var customGenesisTests = []struct {
genesis string
query string
result string
}{
// Plain genesis file without anything extra
{
genesis: `{
"alloc" : {},
"coinbase" : "0x0000000000000000000000000000000000000000",
"difficulty" : "0x20000",
"extraData" : "",
"gasLimit" : "0x2fefd8",
"nonce" : "0x0000000000000042",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"timestamp" : "0x00"
}`,
query: "eth.getBlock(0).nonce",
result: "0x0000000000000042",
},
// Genesis file with an empty chain configuration (ensure missing fields work)
{
genesis: `{
"alloc" : {},
"coinbase" : "0x0000000000000000000000000000000000000000",
"difficulty" : "0x20000",
"extraData" : "",
"gasLimit" : "0x2fefd8",
"nonce" : "0x0000000000000042",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"timestamp" : "0x00",
"config" : {}
}`,
query: "eth.getBlock(0).nonce",
result: "0x0000000000000042",
},
// Genesis file with specific chain configurations
{
genesis: `{
"alloc" : {},
"coinbase" : "0x0000000000000000000000000000000000000000",
"difficulty" : "0x20000",
"extraData" : "",
"gasLimit" : "0x2fefd8",
"nonce" : "0x0000000000000042",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"timestamp" : "0x00",
"config" : {
"homesteadBlock" : 314,
"daoForkBlock" : 141
},
}`,
query: "eth.getBlock(0).nonce",
result: "0x0000000000000042",
},
}
// Tests that initializing Geth with a custom genesis block and chain definitions
// work properly.
func TestCustomGenesis(t *testing.T) {
for i, tt := range customGenesisTests {
// Create a temporary data directory to use and inspect later
datadir := tmpdir(t)
defer os.RemoveAll(datadir)
// Initialize the data directory with the custom genesis block
json := filepath.Join(datadir, "genesis.json")
if err := ioutil.WriteFile(json, []byte(tt.genesis), 0600); err != nil {
t.Fatalf("test %d: failed to write genesis file: %v", i, err)
}
runGeth(t, "--datadir", datadir, "init", json).cmd.Wait()
// Query the custom genesis block
geth := runGeth(t, "--datadir", datadir, "--maxpeers", "0", "--nodiscover", "--nat", "none", "--ipcdisable", "--exec", tt.query, "console")
geth.expectRegexp(tt.result)
geth.expectExit()
}
}
