github.com/core-coin/go-core/v2@v2.1.9/cmd/gocore/genesis_test.go (about)

     1  // Copyright 2023 by the Authors
     2  // This file is part of go-core.
     3  //
     4  // go-core 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-core 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-core. 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  var customGenesisTests = []struct {
    27  	genesis string
    28  	query   string
    29  	result  string
    30  }{
    31  	// Plain genesis file without anything extra
    32  	{
    33  		genesis: `{
    34  			"alloc"      : {},
    35  			"coinbase"   : "0x0000000000000000000000000000000000000000",
    36  			"difficulty" : "0x20000",
    37  			"extraData"  : "",
    38  			"energyLimit"   : "0x2fefd8",
    39  			"nonce"      : "0x0000000000000047",
    40  			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    41  			"timestamp"  : "0x00"
    42  		}`,
    43  		query:  "xcb.getBlock(0).nonce",
    44  		result: "0x0000000000000047",
    45  	},
    46  	// Genesis file with an empty chain configuration (ensure missing fields work)
    47  	{
    48  		genesis: `{
    49  			"alloc"      : {},
    50  			"coinbase"   : "0x0000000000000000000000000000000000000000",
    51  			"difficulty" : "0x20000",
    52  			"extraData"  : "",
    53  			"energyLimit"   : "0x2fefd8",
    54  			"nonce"      : "0x0000000000000047",
    55  			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
    56  			"timestamp"  : "0x00",
    57  			"config"     : {}
    58  		}`,
    59  		query:  "xcb.getBlock(0).nonce",
    60  		result: "0x0000000000000047",
    61  	},
    62  	// Genesis file with specific chain configurations
    63  	{
    64  		genesis: `{
    65  			"alloc"       : {},
    66  			"coinbase"    : "0x0000000000000000000000000000000000000000",
    67  			"difficulty"  : "0x20000",
    68  			"extraData"   : "",
    69  			"energyLimit" : "0x2fefd8",
    70  			"nonce"       : "0x0000000000000047",
    71  			"parentHash"  : "0x0000000000000000000000000000000000000000000000000000000000000000",
    72  			"timestamp"   : "0x00",
    73  			"config"      : {},
    74  		}`,
    75  		query:  "xcb.getBlock(0).nonce",
    76  		result: "0x0000000000000047",
    77  	},
    78  }
    79  
    80  // Tests that initializing Gocore with a custom genesis block and chain definitions
    81  // work properly.
    82  func TestCustomGenesis(t *testing.T) {
    83  	for i, tt := range customGenesisTests {
    84  		// Create a temporary data directory to use and inspect later
    85  		datadir := tmpdir(t)
    86  		defer os.RemoveAll(datadir)
    87  
    88  		// Initialize the data directory with the custom genesis block
    89  		json := filepath.Join(datadir, "genesis.json")
    90  		if err := ioutil.WriteFile(json, []byte(tt.genesis), 0600); err != nil {
    91  			t.Fatalf("test %d: failed to write genesis file: %v", i, err)
    92  		}
    93  		runGocore(t, "--datadir", datadir, "init", json).WaitExit()
    94  
    95  		// Query the custom genesis block
    96  		gocore := runGocore(t,
    97  			"--datadir", datadir, "--maxpeers", "0", "--port", "0",
    98  			"--nodiscover", "--nat", "none", "--ipcdisable",
    99  			"--exec", tt.query, "console")
   100  		gocore.ExpectRegexp(tt.result)
   101  		gocore.ExpectExit()
   102  	}
   103  }