github.com/isti4github/eth-ecc@v0.0.0-20201227085832-c337f2d99319/core/asm/asm_test.go (about)

     1  // Copyright 2017 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 asm
    18  
    19  import (
    20  	"testing"
    21  
    22  	"encoding/hex"
    23  )
    24  
    25  // Tests disassembling the instructions for valid evm code
    26  func TestInstructionIteratorValid(t *testing.T) {
    27  	cnt := 0
    28  	script, _ := hex.DecodeString("61000000")
    29  
    30  	it := NewInstructionIterator(script)
    31  	for it.Next() {
    32  		cnt++
    33  	}
    34  
    35  	if err := it.Error(); err != nil {
    36  		t.Errorf("Expected 2, but encountered error %v instead.", err)
    37  	}
    38  	if cnt != 2 {
    39  		t.Errorf("Expected 2, but got %v instead.", cnt)
    40  	}
    41  }
    42  
    43  // Tests disassembling the instructions for invalid evm code
    44  func TestInstructionIteratorInvalid(t *testing.T) {
    45  	cnt := 0
    46  	script, _ := hex.DecodeString("6100")
    47  
    48  	it := NewInstructionIterator(script)
    49  	for it.Next() {
    50  		cnt++
    51  	}
    52  
    53  	if it.Error() == nil {
    54  		t.Errorf("Expected an error, but got %v instead.", cnt)
    55  	}
    56  }
    57  
    58  // Tests disassembling the instructions for empty evm code
    59  func TestInstructionIteratorEmpty(t *testing.T) {
    60  	cnt := 0
    61  	script, _ := hex.DecodeString("")
    62  
    63  	it := NewInstructionIterator(script)
    64  	for it.Next() {
    65  		cnt++
    66  	}
    67  
    68  	if err := it.Error(); err != nil {
    69  		t.Errorf("Expected 0, but encountered error %v instead.", err)
    70  	}
    71  	if cnt != 0 {
    72  		t.Errorf("Expected 0, but got %v instead.", cnt)
    73  	}
    74  }