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/config/main_test.go

@@ -0,0 +1,74 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package config
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/go-sql-driver/mysql"
+	"github.com/lib/pq"
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/testlib"
+)
+
+var mainHelper *testlib.MainHelper
+
+func TestMain(m *testing.M) {
+	var options = testlib.HelperOptions{
+		EnableStore: true,
+	}
+
+	mainHelper = testlib.NewMainHelperWithOptions(&options)
+	defer mainHelper.Close()
+
+	mainHelper.Main(m)
+}
+
+// truncateTable clears the given table
+func truncateTable(t *testing.T, table string) {
+	t.Helper()
+	sqlSetting := mainHelper.GetSQLSettings()
+	sqlStore := mainHelper.GetSQLStore()
+
+	switch *sqlSetting.DriverName {
+	case model.DatabaseDriverMysql:
+		_, err := sqlStore.GetMasterX().Exec(fmt.Sprintf("TRUNCATE TABLE %s", table))
+		if err != nil {
+			if driverErr, ok := err.(*mysql.MySQLError); ok {
+				// Ignore if the Configurations table does not exist.
+				if driverErr.Number == 1146 {
+					return
+				}
+			}
+		}
+		require.NoError(t, err)
+
+	case model.DatabaseDriverPostgres:
+		_, err := sqlStore.GetMasterX().Exec(fmt.Sprintf("TRUNCATE TABLE %s", table))
+		if err != nil {
+			if driverErr, ok := err.(*pq.Error); ok {
+				// Ignore if the Configurations table does not exist.
+				if driverErr.Code == "42P01" {
+					return
+				}
+			}
+		}
+		require.NoError(t, err)
+
+	default:
+		require.Failf(t, "failed", "unsupported driver name: %s", *sqlSetting.DriverName)
+	}
+}
+
+// truncateTables clears tables used by the config package for reuse in other tests
+func truncateTables(t *testing.T) {
+	t.Helper()
+
+	truncateTable(t, "Configurations")
+	truncateTable(t, "ConfigurationFiles")
+	truncateTable(t, migrationsTableName)
+}