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// Copyright 2019 Northern.tech AS
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package migrate_test
import (
"context"
"errors"
"sort"
"testing"
"time"
"github.com/stretchr/testify/assert"
. "github.com/mendersoftware/go-lib-micro/mongo/migrate"
"github.com/mendersoftware/go-lib-micro/mongo/migrate/mocks"
"go.mongodb.org/mongo-driver/bson"
)
func TestSimpleMigratorApply(t *testing.T) {
if testing.Short() {
t.Skip("skipping TestDummyMigratorApply in short mode.")
}
makeMigration := func(v Version, from Version, err error) Migration {
m := &mocks.Migration{}
m.On("Up", from).Return(err)
m.On("Version").Return(v)
return m
}
testCases := map[string]struct {
Automigrate bool
InputMigrations []MigrationEntry
InputVersion Version
Migrators []Migration
OutputVersion Version
OutputError error
}{
"ok - empty state": {
Automigrate: true,
InputMigrations: nil,
InputVersion: MakeVersion(1, 0, 0),
OutputVersion: MakeVersion(1, 0, 0),
},
"ok - already has version": {
Automigrate: true,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 0, 0),
OutputVersion: MakeVersion(1, 0, 0),
},
"ok - already has version, no automigrate": {
Automigrate: false,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 0, 0),
OutputVersion: MakeVersion(1, 0, 0),
},
"ok - add default target version": {
Automigrate: true,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 1, 0),
OutputVersion: MakeVersion(1, 1, 0),
},
"ok - add default target version, no automigrate": {
Automigrate: false,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 1, 0),
OutputVersion: MakeVersion(1, 0, 0),
OutputError: errors.New("db needs migration: test has version 1.0.0, needs version 1.1.0"),
},
"ok - ran migrations": {
Automigrate: true,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
{
Version: MakeVersion(1, 0, 1),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 1, 0),
OutputVersion: MakeVersion(1, 1, 0),
Migrators: []Migration{
makeMigration(MakeVersion(1, 0, 1), MakeVersion(1, 0, 0), nil),
makeMigration(MakeVersion(1, 1, 0), MakeVersion(1, 0, 1), nil),
},
},
"ok - ran migrations, no automigrate": {
Automigrate: false,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
{
Version: MakeVersion(1, 0, 1),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 1, 0),
OutputVersion: MakeVersion(1, 0, 1),
Migrators: []Migration{
makeMigration(MakeVersion(1, 0, 1), MakeVersion(1, 0, 0), nil),
makeMigration(MakeVersion(1, 1, 0), MakeVersion(1, 0, 1), nil),
},
OutputError: errors.New("db needs migration: test has version 1.0.1, needs version 1.1.0"),
},
"ok - migration to lower": {
Automigrate: true,
InputMigrations: nil,
InputVersion: MakeVersion(0, 1, 0),
OutputVersion: MakeVersion(0, 1, 0),
Migrators: []Migration{
makeMigration(MakeVersion(1, 0, 1), MakeVersion(0, 0, 0), nil),
makeMigration(MakeVersion(1, 1, 0), MakeVersion(1, 0, 1), nil),
},
},
"err - failed migration": {
Automigrate: true,
InputMigrations: []MigrationEntry{
{
Version: MakeVersion(1, 0, 0),
Timestamp: time.Now(),
},
},
InputVersion: MakeVersion(1, 1, 0),
// migration 1.0.3 fails, thus the output should remain at 1.0.2
OutputVersion: MakeVersion(1, 0, 2),
Migrators: []Migration{
makeMigration(MakeVersion(1, 0, 1), MakeVersion(1, 0, 0), nil),
makeMigration(MakeVersion(1, 0, 3), MakeVersion(1, 0, 2), errors.New("failed")),
makeMigration(MakeVersion(1, 0, 2), MakeVersion(1, 0, 1), nil),
},
OutputError: errors.New("failed to apply migration from 1.0.2 to 1.0.3: failed"),
},
}
for name := range testCases {
tc := testCases[name]
t.Run(name, func(t *testing.T) {
//setup
db.Wipe()
client := db.Client()
for i := range tc.InputMigrations {
_, err := client.Database("test").
Collection(DbMigrationsColl).
InsertOne(db.CTX(), tc.InputMigrations[i])
assert.NoError(t, err)
}
//test
m := &SimpleMigrator{Client: client, Db: "test", Automigrate: tc.Automigrate}
err := m.Apply(context.Background(), tc.InputVersion, tc.Migrators)
if tc.OutputError != nil {
assert.Error(t, err)
assert.EqualError(t, err, tc.OutputError.Error())
} else {
assert.NoError(t, err)
}
//verify
var out []MigrationEntry
cursor, _ := client.Database("test").
Collection(DbMigrationsColl).
Find(db.CTX(), bson.M{})
count := 0
for cursor.Next(db.CTX()) {
var res MigrationEntry
count++
elem := &bson.D{}
err = cursor.Decode(elem)
bsonBytes, _ := bson.Marshal(elem)
bson.Unmarshal(bsonBytes, &res)
out = append(out, res)
}
// sort applied migrations
sort.Slice(out, func(i int, j int) bool {
return VersionIsLess(out[i].Version, out[j].Version)
})
// applied migration should be last
assert.Equal(t, tc.OutputVersion, out[len(out)-1].Version)
})
}
}
func TestErrNeedsMigration(t *testing.T) {
err := errors.New("db needs migration: mydbname has version 1.0.0, needs version 1.1.0")
assert.True(t, IsErrNeedsMigration(err))
}
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