[MM-47976] cmd/mattermost/db: add downgrade commands and enable plan saving (#21779)

server/channels/store/sqlstore/migrate_test.go

@@ -0,0 +1,33 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package sqlstore
+
+import (
+	"testing"
+
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUpAndDownMigrations(t *testing.T) {
+	testDrivers := []string{
+		model.DatabaseDriverPostgres,
+		model.DatabaseDriverMysql,
+	}
+
+	for _, driver := range testDrivers {
+		t.Run("Should be reversible for "+driver, func(t *testing.T) {
+			settings, err := makeSqlSettings(driver)
+			if err != nil {
+				t.Skip(err)
+			}
+
+			store := New(*settings, nil)
+			defer store.Close()
+
+			err = store.migrate(migrationsDirectionDown, false)
+			assert.NoError(t, err, "downing migrations should not error")
+		})
+	}
+}