76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
// Copyright 2022 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 rawdb
|
|
|
|
import (
|
|
"bytes"
|
|
"os"
|
|
"testing"
|
|
)
|
|
|
|
func TestCopyFrom(t *testing.T) {
|
|
var (
|
|
content = []byte{0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8}
|
|
prefix = []byte{0x9, 0xa, 0xb, 0xc, 0xd, 0xf}
|
|
)
|
|
var cases = []struct {
|
|
src, dest string
|
|
offset uint64
|
|
writePrefix bool
|
|
}{
|
|
{"foo", "bar", 0, false},
|
|
{"foo", "bar", 1, false},
|
|
{"foo", "bar", 8, false},
|
|
{"foo", "foo", 0, false},
|
|
{"foo", "foo", 1, false},
|
|
{"foo", "foo", 8, false},
|
|
{"foo", "bar", 0, true},
|
|
{"foo", "bar", 1, true},
|
|
{"foo", "bar", 8, true},
|
|
}
|
|
for _, c := range cases {
|
|
os.WriteFile(c.src, content, 0600)
|
|
|
|
if err := copyFrom(c.src, c.dest, c.offset, func(f *os.File) error {
|
|
if !c.writePrefix {
|
|
return nil
|
|
}
|
|
f.Write(prefix)
|
|
return nil
|
|
}); err != nil {
|
|
os.Remove(c.src)
|
|
t.Fatalf("Failed to copy %v", err)
|
|
}
|
|
|
|
blob, err := os.ReadFile(c.dest)
|
|
if err != nil {
|
|
os.Remove(c.src)
|
|
os.Remove(c.dest)
|
|
t.Fatalf("Failed to read %v", err)
|
|
}
|
|
want := content[c.offset:]
|
|
if c.writePrefix {
|
|
want = append(prefix, want...)
|
|
}
|
|
if !bytes.Equal(blob, want) {
|
|
t.Fatal("Unexpected value")
|
|
}
|
|
os.Remove(c.src)
|
|
os.Remove(c.dest)
|
|
}
|
|
}
|