syncthing/lib/db/util_test.go

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// Copyright (C) 2018 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package db
import (
"encoding/json"
"io"
"os"
"testing"
"github.com/syncthing/syncthing/lib/db/backend"
"github.com/syncthing/syncthing/lib/events"
)
// writeJSONS serializes the database to a JSON stream that can be checked
// in to the repo and used for tests.
func writeJSONS(w io.Writer, db backend.Backend) {
it, err := db.NewPrefixIterator(nil)
if err != nil {
panic(err)
}
defer it.Release()
enc := json.NewEncoder(w)
for it.Next() {
err := enc.Encode(map[string][]byte{
"k": it.Key(),
"v": it.Value(),
})
if err != nil {
panic(err)
}
}
}
// we know this function isn't generally used, nonetheless we want it in
// here and the linter to not complain.
var _ = writeJSONS
// openJSONS reads a JSON stream file into a backend DB
func openJSONS(file string) (backend.Backend, error) {
fd, err := os.Open(file)
if err != nil {
return nil, err
}
dec := json.NewDecoder(fd)
db := backend.OpenMemory()
for {
var row map[string][]byte
err := dec.Decode(&row)
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
if err := db.Put(row["k"], row["v"]); err != nil {
return nil, err
}
}
return db, nil
}
func newLowlevel(t testing.TB, backend backend.Backend) *Lowlevel {
t.Helper()
ll, err := NewLowlevel(backend, events.NoopLogger)
if err != nil {
t.Fatal(err)
}
return ll
}
func newLowlevelMemory(t testing.TB) *Lowlevel {
return newLowlevel(t, backend.OpenMemory())
}
func newFileSet(t testing.TB, folder string, db *Lowlevel) *FileSet {
t.Helper()
fset, err := NewFileSet(folder, db)
if err != nil {
t.Fatal(err)
}
return fset
}
func snapshot(t testing.TB, fset *FileSet) *Snapshot {
t.Helper()
snap, err := fset.Snapshot()
if err != nil {
t.Fatal(err)
}
return snap
}
// The following commented tests were used to generate jsons files to stdout for
// future tests and are kept here for reference (reuse).
// TestGenerateIgnoredFilesDB generates a database with files with invalid flags,
// local and remote, in the format used in 0.14.48.
// func TestGenerateIgnoredFilesDB(t *testing.T) {
// db := OpenMemory()
// fs := newFileSet(t, "test", fs.NewFilesystem(fs.FilesystemTypeBasic, "."), db)
// fs.Update(protocol.LocalDeviceID, []protocol.FileInfo{
// { // invalid (ignored) file
// Name: "foo",
// Type: protocol.FileInfoTypeFile,
// Invalid: true,
// Version: protocol.Vector{Counters: []protocol.Counter{{ID: 1, Value: 1000}}},
// },
// { // regular file
// Name: "bar",
// Type: protocol.FileInfoTypeFile,
// Version: protocol.Vector{Counters: []protocol.Counter{{ID: 1, Value: 1001}}},
// },
// })
// fs.Update(protocol.DeviceID{42}, []protocol.FileInfo{
// { // invalid file
// Name: "baz",
// Type: protocol.FileInfoTypeFile,
// Invalid: true,
// Version: protocol.Vector{Counters: []protocol.Counter{{ID: 42, Value: 1000}}},
// },
// { // regular file
// Name: "quux",
// Type: protocol.FileInfoTypeFile,
// Version: protocol.Vector{Counters: []protocol.Counter{{ID: 42, Value: 1002}}},
// },
// })
// writeJSONS(os.Stdout, db.DB)
// }
// TestGenerateUpdate0to3DB generates a database with files with invalid flags, prefixed
// by a slash and other files to test database migration from version 0 to 3, in the
// format used in 0.14.45.
// func TestGenerateUpdate0to3DB(t *testing.T) {
// db := OpenMemory()
// fs := newFileSet(t, update0to3Folder, fs.NewFilesystem(fs.FilesystemTypeBasic, "."), db)
// for devID, files := range haveUpdate0to3 {
// fs.Update(devID, files)
// }
// writeJSONS(os.Stdout, db.DB)
// }
// func TestGenerateUpdateTo10(t *testing.T) {
// db := newLowlevelMemory(t)
// defer db.Close()
// if err := UpdateSchema(db); err != nil {
// t.Fatal(err)
// }
// fs := newFileSet(t, "test", fs.NewFilesystem(fs.FilesystemTypeFake, ""), db)
// files := []protocol.FileInfo{
// {Name: "a", Version: protocol.Vector{Counters: []protocol.Counter{{ID: myID, Value: 1000}}}, Deleted: true, Sequence: 1},
// {Name: "b", Version: protocol.Vector{Counters: []protocol.Counter{{ID: myID, Value: 1000}}}, Blocks: genBlocks(2), Sequence: 2},
// {Name: "c", Version: protocol.Vector{Counters: []protocol.Counter{{ID: myID, Value: 1000}}}, Deleted: true, Sequence: 3},
// }
// fs.Update(protocol.LocalDeviceID, files)
// files[1].Version = files[1].Version.Update(remoteDevice0.Short())
// files[1].Deleted = true
// files[2].Version = files[2].Version.Update(remoteDevice0.Short())
// files[2].Blocks = genBlocks(1)
// files[2].Deleted = false
// fs.Update(remoteDevice0, files)
// fd, err := os.Create("./testdata/v1.4.0-updateTo10.json")
// if err != nil {
// panic(err)
// }
// defer fd.Close()
// writeJSONS(fd, db)
// }