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boltron_usage_test.go
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boltron_usage_test.go
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package boltron_test
import (
"bytes"
"encoding/json"
"fmt"
"os"
"path/filepath"
"testing"
"time"
bolt "github.com/dc0d/boltron"
"github.com/stretchr/testify/assert"
)
type data struct {
ID string `json:"id,omitempty"`
Name string `json:"name,omitempty"`
Score float64 `json:"score,omitempty"`
At time.Time `json:"at,omitempty"`
}
var (
at = time.Date(2018, 1, 1, 1, 1, 1, 1, time.Local)
)
func TestUsage01(t *testing.T) {
assert := assert.New(t)
fp := filepath.Join(os.TempDir(), "bolt_test.db")
defer os.Remove(fp)
opt := &bolt.Options{}
opt.Timeout = time.Second
opt.InitialMmapSize = 1024 * 1024
_db, err := bolt.Open(fp, 0777, opt)
if err != nil {
panic(err)
}
db := _db
defer db.Close()
ix := bolt.NewIndex("names", func(k, v []byte) [][]byte {
if !bytes.HasPrefix(k, []byte("data")) {
return nil
}
var d data
if err := json.Unmarshal(v, &d); err != nil {
return nil
}
if d.At.IsZero() {
return nil
}
return [][]byte{[]byte(d.At.Format("200601021504050700"))}
})
assert.NoError(db.AddIndex(ix))
err = db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("scores"))
return err
})
assert.NoError(err)
err = db.Update(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
for i := 0; i < 3; i++ {
i := i
k := fmt.Sprintf("data:%020d", i)
var d data
d.ID = k
d.Name = fmt.Sprintf("name:%d", i)
d.Score = float64(i)
d.At = at
js, err := json.Marshal(&d)
if err != nil {
return err
}
if err := bk.Put([]byte(k), []byte(js)); err != nil {
return err
}
}
return nil
})
assert.NoError(err)
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
var d data
assert.NoError(json.Unmarshal(v, &d))
assert.Equal(at, d.At)
assert.Condition(func() bool {
return 0 <= d.Score && d.Score <= 2 && len(d.Name) > 0
})
}
return nil
})
assert.NoError(err)
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("names"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
switch string(k) {
case "201801010101010700:data:00000000000000000000":
case "201801010101010700:data:00000000000000000001":
case "201801010101010700:data:00000000000000000002":
// case "data:00000000000000000000:201801010101010700":
// case "data:00000000000000000001:201801010101010700":
// case "data:00000000000000000002:201801010101010700":
default:
assert.Fail("wrong k " + string(k))
}
switch string(v) {
// case "201801010101010700:data:00000000000000000000":
// case "201801010101010700:data:00000000000000000001":
// case "201801010101010700:data:00000000000000000002":
case "data:00000000000000000000":
case "data:00000000000000000001":
case "data:00000000000000000002":
default:
assert.Fail("wrong v " + string(v))
}
}
return nil
})
assert.NoError(err)
err = db.Update(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
for i := 0; i < 3; i++ {
i := i
k := fmt.Sprintf("data:%020d", i)
if err := bk.Delete([]byte(k)); err != nil {
return err
}
}
return nil
})
assert.NoError(err)
count := 0
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
c := bk.Cursor()
for k, _ := c.First(); k != nil; k, _ = c.Next() {
count++
}
return nil
})
assert.NoError(err)
assert.Equal(0, count)
count = 0
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("names"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
_, _ = k, v
// t.Log(string(k), string(v))
count++
}
return nil
})
assert.NoError(err)
assert.Equal(0, count)
}
func TestUsage02(t *testing.T) {
assert := assert.New(t)
fp := filepath.Join(os.TempDir(), "bolt_test.db")
defer os.Remove(fp)
opt := &bolt.Options{}
opt.Timeout = time.Second
opt.InitialMmapSize = 1024 * 1024
_db, err := bolt.Open(fp, 0777, opt)
if err != nil {
panic(err)
}
db := _db
defer db.Close()
ix := bolt.NewIndex("names", func(k, v []byte) [][]byte {
if !bytes.HasPrefix(k, []byte("data")) {
return nil
}
var d data
if err := json.Unmarshal(v, &d); err != nil {
return nil
}
if d.At.IsZero() {
return nil
}
return [][]byte{[]byte(d.At.Format("200601021504050700"))}
})
assert.NoError(db.AddIndex(ix))
err = db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("scores"))
return err
})
assert.NoError(err)
err = db.Update(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
for i := 0; i < 3; i++ {
i := i
k := fmt.Sprintf("data:%020d", i)
var d data
d.ID = k
d.Name = fmt.Sprintf("name:%d", i)
d.Score = float64(i)
d.At = at
js, err := json.Marshal(&d)
if err != nil {
return err
}
if err := bk.Put([]byte(k), []byte(js)); err != nil {
return err
}
}
return nil
})
assert.NoError(err)
assert.NoError(db.RebuildIndex("names"))
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
var d data
assert.NoError(json.Unmarshal(v, &d))
assert.Equal(at, d.At)
assert.Condition(func() bool {
return 0 <= d.Score && d.Score <= 2 && len(d.Name) > 0
})
}
return nil
})
assert.NoError(err)
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("names"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
switch string(k) {
case "201801010101010700:data:00000000000000000000":
case "201801010101010700:data:00000000000000000001":
case "201801010101010700:data:00000000000000000002":
case "data:00000000000000000000:201801010101010700":
case "data:00000000000000000001:201801010101010700":
case "data:00000000000000000002:201801010101010700":
default:
assert.Fail("wrong key")
}
switch string(v) {
case "201801010101010700:data:00000000000000000000":
case "201801010101010700:data:00000000000000000001":
case "201801010101010700:data:00000000000000000002":
case "data:00000000000000000000":
case "data:00000000000000000001":
case "data:00000000000000000002":
default:
assert.Fail("wrong key")
}
}
return nil
})
assert.NoError(err)
err = db.Update(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
for i := 0; i < 3; i++ {
i := i
k := fmt.Sprintf("data:%020d", i)
if err := bk.Delete([]byte(k)); err != nil {
return err
}
}
return nil
})
assert.NoError(err)
count := 0
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("scores"))
c := bk.Cursor()
for k, _ := c.First(); k != nil; k, _ = c.Next() {
count++
}
return nil
})
assert.NoError(err)
assert.Equal(0, count)
count = 0
err = db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("names"))
c := bk.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
t.Log(string(k), string(v))
count++
}
return nil
})
assert.NoError(err)
assert.Equal(0, count)
}