github.1485827954.workers.dev/ethereum/go-ethereum@v1.14.3/ethclient/simulated/options_test.go (about)

     1  // Copyright 2024 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser 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  // The go-ethereum library 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 Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package simulated
    18  
    19  import (
    20  	"context"
    21  	"math/big"
    22  	"strings"
    23  	"testing"
    24  
    25  	"github.com/ethereum/go-ethereum"
    26  	"github.com/ethereum/go-ethereum/core"
    27  	"github.com/ethereum/go-ethereum/core/types"
    28  	"github.com/ethereum/go-ethereum/params"
    29  )
    30  
    31  // Tests that the simulator starts with the initial gas limit in the genesis block,
    32  // and that it keeps the same target value.
    33  func TestWithBlockGasLimitOption(t *testing.T) {
    34  	// Construct a simulator, targeting a different gas limit
    35  	sim := NewBackend(types.GenesisAlloc{}, WithBlockGasLimit(12_345_678))
    36  	defer sim.Close()
    37  
    38  	client := sim.Client()
    39  	genesis, err := client.BlockByNumber(context.Background(), big.NewInt(0))
    40  	if err != nil {
    41  		t.Fatalf("failed to retrieve genesis block: %v", err)
    42  	}
    43  	if genesis.GasLimit() != 12_345_678 {
    44  		t.Errorf("genesis gas limit mismatch: have %v, want %v", genesis.GasLimit(), 12_345_678)
    45  	}
    46  	// Produce a number of blocks and verify the locked in gas target
    47  	sim.Commit()
    48  	head, err := client.BlockByNumber(context.Background(), big.NewInt(1))
    49  	if err != nil {
    50  		t.Fatalf("failed to retrieve head block: %v", err)
    51  	}
    52  	if head.GasLimit() != 12_345_678 {
    53  		t.Errorf("head gas limit mismatch: have %v, want %v", head.GasLimit(), 12_345_678)
    54  	}
    55  }
    56  
    57  // Tests that the simulator honors the RPC call caps set by the options.
    58  func TestWithCallGasLimitOption(t *testing.T) {
    59  	// Construct a simulator, targeting a different gas limit
    60  	sim := NewBackend(types.GenesisAlloc{
    61  		testAddr: {Balance: big.NewInt(10000000000000000)},
    62  	}, WithCallGasLimit(params.TxGas-1))
    63  	defer sim.Close()
    64  
    65  	client := sim.Client()
    66  	_, err := client.CallContract(context.Background(), ethereum.CallMsg{
    67  		From: testAddr,
    68  		To:   &testAddr,
    69  		Gas:  21000,
    70  	}, nil)
    71  	if !strings.Contains(err.Error(), core.ErrIntrinsicGas.Error()) {
    72  		t.Fatalf("error mismatch: have %v, want %v", err, core.ErrIntrinsicGas)
    73  	}
    74  }