package needle import ( "os" "testing" "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, CurrentVersion) if offset != uint64(fileSize) { t.Errorf("Fail to Append Needle.") } }