plugeth/core/rawdb/freezer_utils_test.go

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// 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)
}
}