github.com/bcskill/bcschain/v3@v3.4.9-beta2/cmd/gochain/genesis_test.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of go-ethereum.
     3  //
     4  // go-ethereum is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // go-ethereum is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU General Public License
    15  // along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package main
    18  
    19  import (
    20  	"io/ioutil"
    21  	"os"
    22  	"path/filepath"
    23  	"testing"
    24  )
    25  
    26  type customGenesisTest struct {
    27  	genesis string
    28  	query   string
    29  	result  string
    30  }
    31  
    32  var customGenesisTests = map[string]customGenesisTest{
    33  	// Genesis file with an empty chain configuration (ensure missing fields work)
    34  	"empty": {
    35  		genesis: `{
    36  			"alloc"      : {},
    37  			"coinbase"   : "0x0000000000000000000000000000000000000000",
    38  			"difficulty" : "0x20000",
    39  			"extraData"  : "",
    40  			"gasLimit"   : "0x2fefd8",
    41  			"nonce"      : "0x0125864321546982",
    42  			"mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
    43  			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    44  			"timestamp"  : "0x00",
    45  			"config"     : {
    46  				"clique": {
    47        				"period": 5,
    48        				"epoch": 3000
    49      			}
    50  			}
    51  		}`,
    52  		query:  "eth.getBlock(0).nonce",
    53  		result: "0x0125864321546982",
    54  	},
    55  	// Genesis file with specific chain configurations
    56  	"specific": {
    57  		genesis: `{
    58  			"alloc"      : {},
    59  			"coinbase"   : "0x0000000000000000000000000000000000000000",
    60  			"difficulty" : "0x20000",
    61  			"extraData"  : "",
    62  			"gasLimit"   : "0x2fefd8",
    63  			"nonce"      : "0x0000159876215648",
    64  			"mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
    65  			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    66  			"timestamp"  : "0x00",
    67  			"config"     : {
    68  				"homesteadBlock" : 314,
    69  				"clique": {
    70        				"period": 5,
    71        				"epoch": 3000
    72      			}
    73  			}
    74  		}`,
    75  		query:  "eth.getBlock(0).nonce",
    76  		result: "0x0000159876215648",
    77  	},
    78  }
    79  
    80  // Tests that initializing GoChain with a custom genesis block and chain definitions
    81  // work properly.
    82  func TestCustomGenesis(t *testing.T) {
    83  	for name, test := range customGenesisTests {
    84  		t.Run(name, test.run)
    85  	}
    86  }
    87  func (test customGenesisTest) run(t *testing.T) {
    88  	// Create a temporary data directory to use and inspect later
    89  	datadir := tmpdir(t)
    90  	defer os.RemoveAll(datadir)
    91  
    92  	// Initialize the data directory with the custom genesis block
    93  	json := filepath.Join(datadir, "genesis.json")
    94  	if err := ioutil.WriteFile(json, []byte(test.genesis), 0600); err != nil {
    95  		t.Fatalf("failed to write genesis file: %v", err)
    96  	}
    97  	runGoChain(t, "--datadir", datadir, "init", json).WaitExit()
    98  
    99  	// Query the custom genesis block
   100  	geth := runGoChain(t,
   101  		"--datadir", datadir, "--maxpeers", "0", "--port", "0",
   102  		"--nodiscover", "--nat", "none", "--ipcdisable",
   103  		"--exec", test.query, "console")
   104  	geth.ExpectRegexp(test.result)
   105  	geth.ExpectExit()
   106  }