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/cmd/mattermost/commands/server_test.go

@@ -0,0 +1,149 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package commands
+
+import (
+	"net"
+	"os"
+	"syscall"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v6/server/channels/jobs"
+	"github.com/mattermost/mattermost-server/v6/server/config"
+)
+
+const (
+	unitTestListeningPort = ":0"
+)
+
+//nolint:golint,unused
+type ServerTestHelper struct {
+	disableConfigWatch bool
+	interruptChan      chan os.Signal
+	originalInterval   int
+}
+
+//nolint:golint,unused
+func SetupServerTest(t testing.TB) *ServerTestHelper {
+	if testing.Short() {
+		t.SkipNow()
+	}
+	// Build a channel that will be used by the server to receive system signals...
+	interruptChan := make(chan os.Signal, 1)
+	// ...and sent it immediately a SIGINT value.
+	// This will make the server loop stop as soon as it started successfully.
+	interruptChan <- syscall.SIGINT
+
+	// Let jobs poll for termination every 0.2s (instead of every 15s by default)
+	// Otherwise we would have to wait the whole polling duration before the test
+	// terminates.
+	originalInterval := jobs.DefaultWatcherPollingInterval
+	jobs.DefaultWatcherPollingInterval = 200
+
+	th := &ServerTestHelper{
+		disableConfigWatch: true,
+		interruptChan:      interruptChan,
+		originalInterval:   originalInterval,
+	}
+	return th
+}
+
+//nolint:golint,unused
+func (th *ServerTestHelper) TearDownServerTest() {
+	jobs.DefaultWatcherPollingInterval = th.originalInterval
+}
+
+func TestRunServerSuccess(t *testing.T) {
+	th := SetupServerTest(t)
+	defer th.TearDownServerTest()
+
+	configStore := config.NewTestMemoryStore()
+
+	// Use non-default listening port in case another server instance is already running.
+	cfg := configStore.Get()
+	*cfg.ServiceSettings.ListenAddress = unitTestListeningPort
+	configStore.Set(cfg)
+
+	err := runServer(configStore, th.interruptChan)
+	require.NoError(t, err)
+}
+
+func TestRunServerSystemdNotification(t *testing.T) {
+	th := SetupServerTest(t)
+	defer th.TearDownServerTest()
+
+	// Get a random temporary filename for using as a mock systemd socket
+	socketFile, err := os.CreateTemp("", "mattermost-systemd-mock-socket-")
+	if err != nil {
+		panic(err)
+	}
+	socketPath := socketFile.Name()
+	os.Remove(socketPath)
+
+	// Set the socket path in the process environment
+	originalSocket := os.Getenv("NOTIFY_SOCKET")
+	os.Setenv("NOTIFY_SOCKET", socketPath)
+	defer os.Setenv("NOTIFY_SOCKET", originalSocket)
+
+	// Open the socket connection
+	addr := &net.UnixAddr{
+		Name: socketPath,
+		Net:  "unixgram",
+	}
+	connection, err := net.ListenUnixgram("unixgram", addr)
+	if err != nil {
+		panic(err)
+	}
+	defer connection.Close()
+	defer os.Remove(socketPath)
+
+	// Listen for socket data
+	socketReader := make(chan string)
+	go func(ch chan string) {
+		buffer := make([]byte, 512)
+		count, readErr := connection.Read(buffer)
+		if readErr != nil {
+			panic(readErr)
+		}
+		data := buffer[0:count]
+		ch <- string(data)
+	}(socketReader)
+
+	configStore := config.NewTestMemoryStore()
+
+	// Use non-default listening port in case another server instance is already running.
+	cfg := configStore.Get()
+	*cfg.ServiceSettings.ListenAddress = unitTestListeningPort
+	configStore.Set(cfg)
+
+	// Start and stop the server
+	err = runServer(configStore, th.interruptChan)
+	require.NoError(t, err)
+
+	// Ensure the notification has been sent on the socket and is correct
+	notification := <-socketReader
+	require.Equal(t, notification, "READY=1")
+}
+
+func TestRunServerNoSystemd(t *testing.T) {
+	th := SetupServerTest(t)
+	defer th.TearDownServerTest()
+
+	// Temporarily remove any Systemd socket defined in the environment
+	originalSocket := os.Getenv("NOTIFY_SOCKET")
+	os.Unsetenv("NOTIFY_SOCKET")
+	defer os.Setenv("NOTIFY_SOCKET", originalSocket)
+
+	configStore := config.NewTestMemoryStore()
+
+	// Use non-default listening port in case another server instance is already running.
+	cfg := configStore.Get()
+	*cfg.ServiceSettings.ListenAddress = unitTestListeningPort
+	configStore.Set(cfg)
+
+	err := runServer(configStore, th.interruptChan)
+	require.NoError(t, err)
+}