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- // Copyright 2014 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 common
- import (
- "bytes"
- "testing"
- )
- func TestCopyBytes(t *testing.T) {
- input := []byte{1, 2, 3, 4}
- v := CopyBytes(input)
- if !bytes.Equal(v, []byte{1, 2, 3, 4}) {
- t.Fatal("not equal after copy")
- }
- v[0] = 99
- if bytes.Equal(v, input) {
- t.Fatal("result is not a copy")
- }
- }
- func TestLeftPadBytes(t *testing.T) {
- val := []byte{1, 2, 3, 4}
- padded := []byte{0, 0, 0, 0, 1, 2, 3, 4}
- if r := LeftPadBytes(val, 8); !bytes.Equal(r, padded) {
- t.Fatalf("LeftPadBytes(%v, 8) == %v", val, r)
- }
- if r := LeftPadBytes(val, 2); !bytes.Equal(r, val) {
- t.Fatalf("LeftPadBytes(%v, 2) == %v", val, r)
- }
- }
- func TestRightPadBytes(t *testing.T) {
- val := []byte{1, 2, 3, 4}
- padded := []byte{1, 2, 3, 4, 0, 0, 0, 0}
- if r := RightPadBytes(val, 8); !bytes.Equal(r, padded) {
- t.Fatalf("RightPadBytes(%v, 8) == %v", val, r)
- }
- if r := RightPadBytes(val, 2); !bytes.Equal(r, val) {
- t.Fatalf("RightPadBytes(%v, 2) == %v", val, r)
- }
- }
- func TestFromHex(t *testing.T) {
- input := "0x01"
- expected := []byte{1}
- result := FromHex(input)
- if !bytes.Equal(expected, result) {
- t.Errorf("Expected %x got %x", expected, result)
- }
- }
- func TestIsHex(t *testing.T) {
- tests := []struct {
- input string
- ok bool
- }{
- {"", true},
- {"0", false},
- {"00", true},
- {"a9e67e", true},
- {"A9E67E", true},
- {"0xa9e67e", false},
- {"a9e67e001", false},
- {"0xHELLO_MY_NAME_IS_STEVEN_@#$^&*", false},
- }
- for _, test := range tests {
- if ok := isHex(test.input); ok != test.ok {
- t.Errorf("isHex(%q) = %v, want %v", test.input, ok, test.ok)
- }
- }
- }
- func TestFromHexOddLength(t *testing.T) {
- input := "0x1"
- expected := []byte{1}
- result := FromHex(input)
- if !bytes.Equal(expected, result) {
- t.Errorf("Expected %x got %x", expected, result)
- }
- }
- func TestNoPrefixShortHexOddLength(t *testing.T) {
- input := "1"
- expected := []byte{1}
- result := FromHex(input)
- if !bytes.Equal(expected, result) {
- t.Errorf("Expected %x got %x", expected, result)
- }
- }
- func TestTrimRightZeroes(t *testing.T) {
- tests := []struct {
- arr []byte
- exp []byte
- }{
- {FromHex("0x00ffff00ff0000"), FromHex("0x00ffff00ff")},
- {FromHex("0x00000000000000"), []byte{}},
- {FromHex("0xff"), FromHex("0xff")},
- {[]byte{}, []byte{}},
- {FromHex("0x00ffffffffffff"), FromHex("0x00ffffffffffff")},
- }
- for i, test := range tests {
- got := TrimRightZeroes(test.arr)
- if !bytes.Equal(got, test.exp) {
- t.Errorf("test %d, got %x exp %x", i, got, test.exp)
- }
- }
- }
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