-
Notifications
You must be signed in to change notification settings - Fork 0
/
main_test.go
54 lines (44 loc) · 1.38 KB
/
main_test.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
package main
import (
"testing"
"github.com/dgraph-io/badger/v3"
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/util"
)
func TestReadLevelDB(t *testing.T) {
db, _ := leveldb.OpenFile("./testdata/leveldb", nil)
defer db.Close()
iter := db.NewIterator(&util.Range{Start: []byte("fact1638772710#key_0#a_0"), Limit: []byte("fact1638772710#key_0#c_0_3")}, nil)
for iter.Next() {
// Remember that the contents of the returned slice should not be modified, and
// only valid until the next call to Next.
key := iter.Key()
value := iter.Value()
t.Logf("key:%s,value:%s", key, value)
}
iter.Release()
}
var start = "fact1638772710#key_0#a_0"
var limit = "fact1638772710#key_0#c_0_3"
func TestReadBadgerDB(t *testing.T) {
dir := "./testdata/badgerdb"
opts := new(badger.Options)
*opts = getTestOptions(dir)
db, _ := badger.Open(*opts)
defer db.Close()
db.View(func(txn *badger.Txn) error {
opt := badger.DefaultIteratorOptions
// NOTE: Comment opt.Prefix out here to compare the performance
// difference between providing Prefix as an option, v/s not. I
// see a 20% improvement when there are ~80 SSTables.
opt.Prefix = []byte(start)
opt.AllVersions = true
itr := txn.NewIterator(opt)
defer itr.Close()
key := []byte(start)
for itr.Seek(key); itr.ValidForPrefix(key); itr.Next() {
t.Logf(itr.Item().String())
}
return nil
})
}