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package needle
import (
"bytes"
"os"
"testing"
"time"
"github.com/seaweedfs/seaweedfs/weed/storage/backend"
"github.com/seaweedfs/seaweedfs/weed/storage/types"
)
func TestAppend(t *testing.T) {
n := &Needle{
Cookie: types.Cookie(123), // Cookie Cookie `comment:"random number to mitigate brute force lookups"`
Id: types.NeedleId(123), // Id NeedleId `comment:"needle id"`
Size: 8, // Size uint32 `comment:"sum of DataSize,Data,NameSize,Name,MimeSize,Mime"`
DataSize: 4, // DataSize uint32 `comment:"Data size"` //version2
Data: []byte("abcd"), // Data []byte `comment:"The actual file data"`
Flags: 0, // Flags byte `comment:"boolean flags"` //version2
NameSize: 0, // NameSize uint8 //version2
Name: nil, // Name []byte `comment:"maximum 256 characters"` //version2
MimeSize: 0, // MimeSize uint8 //version2
Mime: nil, // Mime []byte `comment:"maximum 256 characters"` //version2
PairsSize: 0, // PairsSize uint16 //version2
Pairs: nil, // Pairs []byte `comment:"additional name value pairs, json format, maximum 6
LastModified: 123, // LastModified uint64 //only store LastModifiedBytesLength bytes, which is 5 bytes
Ttl: nil, // Ttl *TTL
Checksum: 123, // Checksum CRC `comment:"CRC32 to check integrity"`
AppendAtNs: 123, // AppendAtNs uint64 `comment:"append timestamp in nano seconds"` //version3
Padding: nil, // Padding []byte `comment:"Aligned to 8 bytes"`
}
tempFile, err := os.CreateTemp("", ".dat")
if err != nil {
t.Errorf("Fail TempFile. %v", err)
return
}
/*
uint8 : 0 to 255
uint16 : 0 to 65535
uint32 : 0 to 4294967295
uint64 : 0 to 18446744073709551615
int8 : -128 to 127
int16 : -32768 to 32767
int32 : -2147483648 to 2147483647
int64 : -9223372036854775808 to 9223372036854775807
*/
fileSize := int64(4294967296) + 10000
tempFile.Truncate(fileSize)
defer func() {
tempFile.Close()
os.Remove(tempFile.Name())
}()
datBackend := backend.NewDiskFile(tempFile)
defer datBackend.Close()
offset, _, _, _ := n.Append(datBackend, GetCurrentVersion())
if offset != uint64(fileSize) {
t.Errorf("Fail to Append Needle.")
}
}
func versionString(v Version) string {
switch v {
case Version1:
return "Version1"
case Version2:
return "Version2"
case Version3:
return "Version3"
default:
return "UnknownVersion"
}
}
func TestWriteNeedle_CompatibilityWithLegacy(t *testing.T) {
versions := []Version{Version1, Version2, Version3}
for _, version := range versions {
t.Run(versionString(version), func(t *testing.T) {
n := &Needle{
Cookie: 0x12345678,
Id: 0x1122334455667788,
Data: []byte("hello world"),
Flags: 0xFF,
Name: []byte("filename.txt"),
Mime: []byte("text/plain"),
LastModified: 0x1234567890,
Ttl: nil, // Add TTL if needed
Pairs: []byte("key=value"),
PairsSize: 9,
Checksum: 0xCAFEBABE,
AppendAtNs: 0xDEADBEEF,
}
// Legacy
legacyBuf := &bytes.Buffer{}
_, _, err := n.LegacyPrepareWriteBuffer(version, legacyBuf)
if err != nil {
t.Fatalf("LegacyPrepareWriteBuffer failed: %v", err)
}
// New
newBuf := &bytes.Buffer{}
offset := uint64(0)
switch version {
case Version1:
_, _, err = writeNeedleV1(n, offset, newBuf)
case Version2:
_, _, err = writeNeedleV2(n, offset, newBuf)
case Version3:
_, _, err = writeNeedleV3(n, offset, newBuf)
}
if err != nil {
t.Fatalf("writeNeedleV%d failed: %v", version, err)
}
if !bytes.Equal(legacyBuf.Bytes(), newBuf.Bytes()) {
t.Errorf("Data layout mismatch for version %d\nLegacy: %x\nNew: %x", version, legacyBuf.Bytes(), newBuf.Bytes())
}
})
}
}
type mockBackendWriter struct {
buf *bytes.Buffer
}
func (m *mockBackendWriter) WriteAt(p []byte, off int64) (n int, err error) {
return m.buf.Write(p)
}
func (m *mockBackendWriter) GetStat() (int64, time.Time, error) {
return 0, time.Time{}, nil
}
func (m *mockBackendWriter) Truncate(size int64) error {
return nil
}
func (m *mockBackendWriter) Name() string {
return "mock"
}
func (m *mockBackendWriter) Close() error {
return nil
}
func (m *mockBackendWriter) Sync() error {
return nil
}
func (m *mockBackendWriter) ReadAt(p []byte, off int64) (n int, err error) {
// Not used in this test
return 0, nil
}
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