Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/jobs/schedulers_test.go

@@ -0,0 +1,154 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+package jobs
+
+import (
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/plugin/plugintest/mock"
+	"github.com/mattermost/mattermost-server/v6/server/channels/store/storetest"
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils/testutils"
+)
+
+type MockScheduler struct {
+	mock.Mock
+}
+
+func (scheduler *MockScheduler) Enabled(cfg *model.Config) bool {
+	return true
+}
+
+func (scheduler *MockScheduler) NextScheduleTime(cfg *model.Config, now time.Time, pendingJobs bool, lastSuccessfulJob *model.Job) *time.Time {
+	nextTime := time.Now().Add(60 * time.Second)
+	return &nextTime
+}
+
+func (scheduler *MockScheduler) ScheduleJob(cfg *model.Config, pendingJobs bool, lastSuccessfulJob *model.Job) (*model.Job, *model.AppError) {
+	return nil, nil
+}
+
+func TestScheduler(t *testing.T) {
+	mockStore := &storetest.Store{}
+	defer mockStore.AssertExpectations(t)
+
+	job := &model.Job{
+		Id:       model.NewId(),
+		CreateAt: model.GetMillis(),
+		Status:   model.JobStatusPending,
+		Type:     model.JobTypeMessageExport,
+	}
+	// mock job store doesn't return a previously successful job, forcing fallback to config
+	mockStore.JobStore.On("GetNewestJobByStatusesAndType", mock.AnythingOfType("[]string"), mock.AnythingOfType("string")).Return(job, nil)
+	mockStore.JobStore.On("GetCountByStatusAndType", mock.AnythingOfType("string"), mock.AnythingOfType("string")).Return(int64(1), nil)
+
+	jobServer := &JobServer{
+		Store: mockStore,
+		ConfigService: &testutils.StaticConfigService{
+			Cfg: &model.Config{
+				// mock config
+				DataRetentionSettings: model.DataRetentionSettings{
+					EnableMessageDeletion: model.NewBool(true),
+				},
+				MessageExportSettings: model.MessageExportSettings{
+					EnableExport: model.NewBool(true),
+				},
+			},
+		},
+	}
+
+	jobServer.initSchedulers()
+	jobServer.RegisterJobType(model.JobTypeDataRetention, nil, new(MockScheduler))
+	jobServer.RegisterJobType(model.JobTypeMessageExport, nil, new(MockScheduler))
+
+	t.Run("Base", func(t *testing.T) {
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+
+		jobServer.StopSchedulers()
+		// They should be all on here
+		for _, element := range jobServer.schedulers.nextRunTimes {
+			assert.NotNil(t, element)
+		}
+	})
+
+	t.Run("ClusterLeaderChanged", func(t *testing.T) {
+		jobServer.initSchedulers()
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+		jobServer.HandleClusterLeaderChange(false)
+		jobServer.StopSchedulers()
+		// They should be turned off
+		for _, element := range jobServer.schedulers.nextRunTimes {
+			assert.Nil(t, element)
+		}
+	})
+
+	t.Run("ClusterLeaderChangedBeforeStart", func(t *testing.T) {
+		jobServer.initSchedulers()
+		jobServer.HandleClusterLeaderChange(false)
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+		jobServer.StopSchedulers()
+		for _, element := range jobServer.schedulers.nextRunTimes {
+			assert.Nil(t, element)
+		}
+	})
+
+	t.Run("DoubleClusterLeaderChangedBeforeStart", func(t *testing.T) {
+		jobServer.initSchedulers()
+		jobServer.HandleClusterLeaderChange(false)
+		jobServer.HandleClusterLeaderChange(true)
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+		jobServer.StopSchedulers()
+		for _, element := range jobServer.schedulers.nextRunTimes {
+			assert.NotNil(t, element)
+		}
+	})
+
+	t.Run("ConfigChanged", func(t *testing.T) {
+		jobServer.initSchedulers()
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+		jobServer.HandleClusterLeaderChange(false)
+		// After running a config change, they should stay off
+		jobServer.schedulers.handleConfigChange(nil, nil)
+		jobServer.StopSchedulers()
+		for _, element := range jobServer.schedulers.nextRunTimes {
+			assert.Nil(t, element)
+		}
+	})
+
+	t.Run("ConfigChangedDeadlock", func(t *testing.T) {
+		jobServer.initSchedulers()
+		jobServer.StartSchedulers()
+		time.Sleep(time.Second)
+
+		var wg sync.WaitGroup
+		wg.Add(2)
+		go func() {
+			defer wg.Done()
+			jobServer.StopSchedulers()
+		}()
+		go func() {
+			defer wg.Done()
+			jobServer.schedulers.handleConfigChange(nil, nil)
+		}()
+
+		wg.Wait()
+	})
+}
+
+func TestRandomDelay(t *testing.T) {
+	cases := []int64{5, 10, 100}
+	for _, c := range cases {
+		out := getRandomDelay(c)
+		require.Less(t, out.Milliseconds(), c)
+	}
+}