path: root/params/config_test.go

// Copyright 2017 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 params

import (
    "math/big"
    "reflect"
    "testing"
)

func TestCheckCompatible(t *testing.T) {
    type test struct {
        stored, new *ChainConfig
        head        uint64
        wantErr     *ConfigCompatError
    }
    tests := []test{
        {stored: AllEthashProtocolChanges, new: AllEthashProtocolChanges, head: 0, wantErr: nil},
        {stored: AllEthashProtocolChanges, new: AllEthashProtocolChanges, head: 100, wantErr: nil},
        {
            stored:  &ChainConfig{EIP150Block: big.NewInt(10)},
            new:     &ChainConfig{EIP150Block: big.NewInt(20)},
            head:    9,
            wantErr: nil,
        },
        {
            stored: AllEthashProtocolChanges,
            new:    &ChainConfig{HomesteadBlock: nil},
            head:   3,
            wantErr: &ConfigCompatError{
                What:         "Homestead fork block",
                StoredConfig: big.NewInt(0),
                NewConfig:    nil,
                RewindTo:     0,
            },
        },
        {
            stored: AllEthashProtocolChanges,
            new:    &ChainConfig{HomesteadBlock: big.NewInt(1)},
            head:   3,
            wantErr: &ConfigCompatError{
                What:         "Homestead fork block",
                StoredConfig: big.NewInt(0),
                NewConfig:    big.NewInt(1),
                RewindTo:     0,
            },
        },
        {
            stored: &ChainConfig{HomesteadBlock: big.NewInt(30), EIP150Block: big.NewInt(10)},
            new:    &ChainConfig{HomesteadBlock: big.NewInt(25), EIP150Block: big.NewInt(20)},
            head:   25,
            wantErr: &ConfigCompatError{
                What:         "EIP150 fork block",
                StoredConfig: big.NewInt(10),
                NewConfig:    big.NewInt(20),
                RewindTo:     9,
            },
        },
    }

    for _, test := range tests {
        err := test.stored.CheckCompatible(test.new, test.head)
        if !reflect.DeepEqual(err, test.wantErr) {
            t.Errorf("error mismatch:\nstored: %v\nnew: %v\nhead: %v\nerr: %v\nwant: %v", test.stored, test.new, test.head, err, test.wantErr)
        }
    }
}