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// Copyright (C) MongoDB, Inc. 2019-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
package mongorestore
import (
"context"
"fmt"
"io/ioutil"
"strings"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/mongodb/mongo-tools-common/bsonutil"
"github.com/mongodb/mongo-tools-common/db"
"github.com/mongodb/mongo-tools-common/testtype"
"github.com/mongodb/mongo-tools-common/testutil"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
. "github.com/smartystreets/goconvey/convey"
)
const txnTestDataFile = "testdata/transactions.json"
type txnTestDataMap map[string]*txnTestDataCase
type txnTestDataCase struct {
Ops []db.Oplog `bson:"ops"`
NS string `bson:"ns"`
PostImage []bson.D `bson:"postimage"`
}
func TestMongorestoreTxns(t *testing.T) {
testtype.SkipUnlessTestType(t, testtype.IntegrationTestType)
client, err := testutil.GetBareSession()
if err != nil {
t.Fatalf("No server available")
}
data, err := readTxnTestData(txnTestDataFile)
if err != nil {
t.Fatal(err)
}
// Create test collections (if they don't exist) and clear documents.
for _, v := range data {
parts := strings.SplitN(v.NS, ".", 2)
db := client.Database(parts[0])
coll := db.Collection(parts[1])
err := coll.Drop(context.Background())
if err != nil {
t.Fatal(err)
}
res := db.RunCommand(context.Background(), bson.D{{"create", parts[1]}})
if res.Err() != nil {
t.Fatal(res.Err())
}
}
// Create a dump directory from transactions.json
dumpPath := createTxnTestDataDir(t, data)
Convey("With a test MongoRestore", t, func() {
args := []string{
OplogReplayOption,
DropOption,
dumpPath,
}
restore, err := getRestoreWithArgs(args...)
So(err, ShouldBeNil)
result := restore.Restore()
So(result.Err, ShouldBeNil)
for k, v := range data {
Println("postImageCheck for", k)
So(postImageCheck(client, v), ShouldBeNil)
}
})
}
// createTxnTestDataDir constructs a dump directory with an oplog.bson
// file that randomly interleaves different cases from the
// testdata/transactions.json file. This tests that different transactions
// can be cached while continuing processing waiting for a committing entry.
func createTxnTestDataDir(t *testing.T, data txnTestDataMap) string {
var opStreams [][]db.Oplog
for _, v := range data {
if len(v.Ops) != 0 {
opStreams = append(opStreams, v.Ops)
}
}
dumpDir := testDumpDir{
dirName: "txntest",
oplog: testutil.MergeOplogStreams(opStreams),
}
err := dumpDir.Create()
if err != nil {
t.Fatal(err)
}
return dumpDir.Path()
}
func readTxnTestData(filename string) (txnTestDataMap, error) {
b, err := ioutil.ReadFile(filename)
if err != nil {
return nil, fmt.Errorf("couldn't load %s: %v", filename, err)
}
var data bson.Raw
err = bson.UnmarshalExtJSON(b, false, &data)
if err != nil {
return nil, fmt.Errorf("couldn't decode JSON: %v", err)
}
txnTestData := make(txnTestDataMap)
err = bson.Unmarshal(data, &txnTestData)
if err != nil {
return nil, fmt.Errorf("couldn't decode test data: %v", err)
}
return txnTestData, nil
}
func postImageCheck(client *mongo.Client, c *txnTestDataCase) error {
expected := make(map[int]bson.D)
for _, v := range c.PostImage {
id, err := bsonutil.FindIntByKey("_id", &v)
if err != nil {
return err
}
expected[id] = v
}
parts := strings.SplitN(c.NS, ".", 2)
db := client.Database(parts[0])
coll := db.Collection(parts[1])
cursor, err := coll.Find(context.Background(), bson.D{})
if err != nil {
return err
}
defer cursor.Close(context.Background())
var docs []bson.D
err = cursor.All(context.Background(), &docs)
if err != nil {
return err
}
for _, got := range docs {
id, err := bsonutil.FindIntByKey("_id", &got)
if err != nil {
return err
}
want, ok := expected[id]
if !ok {
return fmt.Errorf("got unexpected document with _id '%d'", id)
}
if diff := cmp.Diff(got, want); diff != "" {
return fmt.Errorf(diff)
}
delete(expected, id)
}
// Check if all documents were found
if len(expected) != 0 {
var missing []int
for i := range expected {
missing = append(missing, i)
}
return fmt.Errorf("missing documents: %v", missing)
}
return nil
}
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