github.com/klaytn/klaytn@v1.12.1/blockchain/asm/asm_test.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2017 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from core/asm/asm_test.go (2018/06/04).
    19  // Modified and improved for the klaytn development.
    20  
    21  package asm
    22  
    23  import (
    24  	"encoding/hex"
    25  	"testing"
    26  )
    27  
    28  // Tests disassembling the instructions for valid evm code
    29  func TestInstructionIteratorValid(t *testing.T) {
    30  	cnt := 0
    31  	script, _ := hex.DecodeString("61000000")
    32  
    33  	it := NewInstructionIterator(script)
    34  	for it.Next() {
    35  		cnt++
    36  	}
    37  
    38  	if err := it.Error(); err != nil {
    39  		t.Errorf("Expected 2, but encountered error %v instead.", err)
    40  	}
    41  	if cnt != 2 {
    42  		t.Errorf("Expected 2, but got %v instead.", cnt)
    43  	}
    44  }
    45  
    46  // Tests disassembling the instructions for invalid evm code
    47  func TestInstructionIteratorInvalid(t *testing.T) {
    48  	cnt := 0
    49  	script, _ := hex.DecodeString("6100")
    50  
    51  	it := NewInstructionIterator(script)
    52  	for it.Next() {
    53  		cnt++
    54  	}
    55  
    56  	if it.Error() == nil {
    57  		t.Errorf("Expected an error, but got %v instead.", cnt)
    58  	}
    59  }
    60  
    61  // Tests disassembling the instructions for empty evm code
    62  func TestInstructionIteratorEmpty(t *testing.T) {
    63  	cnt := 0
    64  	script, _ := hex.DecodeString("")
    65  
    66  	it := NewInstructionIterator(script)
    67  	for it.Next() {
    68  		cnt++
    69  	}
    70  
    71  	if err := it.Error(); err != nil {
    72  		t.Errorf("Expected 0, but encountered error %v instead.", err)
    73  	}
    74  	if cnt != 0 {
    75  		t.Errorf("Expected 0, but got %v instead.", cnt)
    76  	}
    77  }