writecache: add test for migration from BoltBD

Refs #3076.

Signed-off-by: Andrey Butusov <[email protected]>

Author: End-rey

pkg/local_object_storage/writecache/migrate_test.go

@@ -0,0 +1,87 @@
+package writecache
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
+	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
+	objecttest "github.com/nspcc-dev/neofs-sdk-go/object/test"
+	"github.com/stretchr/testify/require"
+	"go.etcd.io/bbolt"
+)
+
+func TestMigrateFromBolt(t *testing.T) {
+	c, b, _ := newCache(t)
+
+	wc := c.(*cache)
+	path := filepath.Join(wc.path, dbName)
+
+	require.NoError(t, wc.Close())
+
+	t.Run("ok, no database", func(t *testing.T) {
+		require.NoError(t, wc.migrate())
+	})
+
+	db, err := bbolt.Open(path, os.ModePerm, &bbolt.Options{
+		NoFreelistSync: true,
+		ReadOnly:       false,
+		Timeout:        time.Second,
+	})
+	require.NoError(t, err)
+
+	t.Run("couldn't open database", func(t *testing.T) {
+		err := wc.migrate()
+		require.Error(t, err)
+		fmt.Println(err)
+	})
+
+	require.NoError(t, db.Close())
+	t.Run("no default bucket", func(t *testing.T) {
+		err := wc.migrate()
+		require.Error(t, err)
+		fmt.Println(err)
+	})
+
+	db, err = bbolt.Open(path, os.ModePerm, &bbolt.Options{
+		NoFreelistSync: true,
+		ReadOnly:       false,
+		Timeout:        time.Second,
+	})
+	require.NoError(t, err)
+
+	obj := objecttest.Object()
+
+	var addr oid.Address
+	addr.SetObject(obj.GetID())
+	addr.SetContainer(obj.GetContainerID())
+
+	require.NoError(t, db.Batch(func(tx *bbolt.Tx) error {
+		b, err := tx.CreateBucketIfNotExists(defaultBucket)
+		require.NoError(t, err)
+
+		require.NoError(t, b.Put([]byte(addr.String()), obj.Marshal()))
+
+		return nil
+	}))
+
+	t.Run("migrate object", func(t *testing.T) {
+		require.NoError(t, db.Close())
+		require.NoError(t, wc.migrate())
+
+		_, err := wc.Get(addr)
+		require.Error(t, err, apistatus.ObjectNotFound{})
+
+		bObject, err := b.Get(addr, []byte{})
+		require.NoError(t, err)
+		require.Equal(t, obj.GetID(), bObject.GetID())
+		require.Equal(t, obj.GetContainerID(), bObject.GetContainerID())
+		require.Equal(t, obj.Marshal(), bObject.Marshal())
+
+		_, err = os.Stat(path)
+		require.Error(t, err, os.ErrNotExist)
+	})
+}