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/app/platform/busy_test.go

@@ -0,0 +1,151 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package platform
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/einterfaces"
+)
+
+func TestBusySet(t *testing.T) {
+	cluster := &ClusterMock{Busy: &Busy{}}
+	busy := NewBusy(cluster)
+
+	isNotBusy := func() bool {
+		return !busy.IsBusy()
+	}
+
+	require.False(t, busy.IsBusy())
+
+	busy.Set(time.Millisecond * 500)
+	require.True(t, busy.IsBusy())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+
+	// should automatically expire after 500ms.
+	require.Eventually(t, isNotBusy, time.Second*15, time.Millisecond*100)
+	// allow a moment for cluster to sync.
+	require.Eventually(t, func() bool { return compareBusyState(t, busy, cluster.Busy) }, time.Second*15, time.Millisecond*20)
+
+	// test set after auto expiry.
+	busy.Set(time.Second * 30)
+	require.True(t, busy.IsBusy())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+	expire := busy.Expires()
+	require.Greater(t, expire.Unix(), time.Now().Add(time.Second*10).Unix())
+
+	// test extending existing expiry
+	busy.Set(time.Minute * 5)
+	require.True(t, busy.IsBusy())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+	expire = busy.Expires()
+	require.Greater(t, expire.Unix(), time.Now().Add(time.Minute*2).Unix())
+
+	busy.Clear()
+	require.False(t, busy.IsBusy())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+}
+
+func TestBusyExpires(t *testing.T) {
+	cluster := &ClusterMock{Busy: &Busy{}}
+	busy := NewBusy(cluster)
+
+	isNotBusy := func() bool {
+		return !busy.IsBusy()
+	}
+
+	// get expiry before it is set
+	expire := busy.Expires()
+	// should be time.Time zero value
+	require.Equal(t, time.Time{}.Unix(), expire.Unix())
+
+	// get expiry after it is set
+	busy.Set(time.Minute * 5)
+	expire = busy.Expires()
+	require.Greater(t, expire.Unix(), time.Now().Add(time.Minute*2).Unix())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+
+	// get expiry after clear
+	busy.Clear()
+	expire = busy.Expires()
+	// should be time.Time zero value
+	require.Equal(t, time.Time{}.Unix(), expire.Unix())
+	require.True(t, compareBusyState(t, busy, cluster.Busy))
+
+	// get expiry after auto-expire
+	busy.Set(time.Millisecond * 100)
+	require.Eventually(t, isNotBusy, time.Second*5, time.Millisecond*20)
+	expire = busy.Expires()
+	// should be time.Time zero value
+	require.Equal(t, time.Time{}.Unix(), expire.Unix())
+	// allow a moment for cluster to sync
+	require.Eventually(t, func() bool { return compareBusyState(t, busy, cluster.Busy) }, time.Second*15, time.Millisecond*20)
+}
+
+func TestBusyRace(t *testing.T) {
+	cluster := &ClusterMock{Busy: &Busy{}}
+	busy := NewBusy(cluster)
+
+	busy.Set(500 * time.Millisecond)
+
+	// We are sleeping in order to let the race trigger.
+	time.Sleep(time.Second)
+}
+
+func compareBusyState(t *testing.T, busy1 *Busy, busy2 *Busy) bool {
+	t.Helper()
+	if busy1.IsBusy() != busy2.IsBusy() {
+		busy1JSON, _ := busy1.ToJSON()
+		busy2JSON, _ := busy2.ToJSON()
+		t.Logf("busy1:%s;  busy2:%s\n", busy1JSON, busy2JSON)
+		return false
+	}
+	if busy1.Expires().Unix() != busy2.Expires().Unix() {
+		busy1JSON, _ := busy1.ToJSON()
+		busy2JSON, _ := busy2.ToJSON()
+		t.Logf("busy1:%s;  busy2:%s\n", busy1JSON, busy2JSON)
+		return false
+	}
+	return true
+}
+
+// ClusterMock simulates the busy state of a cluster.
+type ClusterMock struct {
+	Busy *Busy
+}
+
+func (c *ClusterMock) SendClusterMessage(msg *model.ClusterMessage) {
+	var sbs model.ServerBusyState
+	json.Unmarshal(msg.Data, &sbs)
+	c.Busy.ClusterEventChanged(&sbs)
+}
+
+func (c *ClusterMock) SendClusterMessageToNode(nodeID string, msg *model.ClusterMessage) error {
+	return nil
+}
+
+func (c *ClusterMock) StartInterNodeCommunication() {}
+func (c *ClusterMock) StopInterNodeCommunication()  {}
+func (c *ClusterMock) RegisterClusterMessageHandler(event model.ClusterEvent, crm einterfaces.ClusterMessageHandler) {
+}
+func (c *ClusterMock) GetClusterId() string                                      { return "cluster_mock" }
+func (c *ClusterMock) IsLeader() bool                                            { return false }
+func (c *ClusterMock) GetMyClusterInfo() *model.ClusterInfo                      { return nil }
+func (c *ClusterMock) GetClusterInfos() []*model.ClusterInfo                     { return nil }
+func (c *ClusterMock) NotifyMsg(buf []byte)                                      {}
+func (c *ClusterMock) GetClusterStats() ([]*model.ClusterStats, *model.AppError) { return nil, nil }
+func (c *ClusterMock) GetLogs(page, perPage int) ([]string, *model.AppError)     { return nil, nil }
+func (c *ClusterMock) QueryLogs(page, perPage int) (map[string][]string, *model.AppError) {
+	return nil, nil
+}
+func (c *ClusterMock) GetPluginStatuses() (model.PluginStatuses, *model.AppError) { return nil, nil }
+func (c *ClusterMock) ConfigChanged(previousConfig *model.Config, newConfig *model.Config, sendToOtherServer bool) *model.AppError {
+	return nil
+}
+func (c *ClusterMock) HealthScore() int { return 0 }