SQLStore: Run tests as integration tests (#28265)

* sqlstore: Run tests as integration tests

* Truncate database instead of re-creating it on each test

* Fix test description

See https://github.com/grafana/grafana/pull/12129

* Fix lint issues

* Fix postgres dialect after review suggestion

* Rename and document functions after review suggestion

* Add periods

* Fix auto-increment value for mysql dialect

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>
(cherry picked from commit 4937f0daab)

pkg/services/sqlstore/migrator/sqlite_dialect.go

@@ -3,6 +3,7 @@ package migrator
 import (
 	"fmt"
 
+	"github.com/grafana/grafana/pkg/util/errutil"
 	"github.com/mattn/go-sqlite3"
 	"xorm.io/xorm"
 )
@@ -85,6 +86,39 @@ func (db *Sqlite3) CleanDB() error {
 	return nil
 }
 
+// TruncateDBTables deletes all data from all the tables and resets the sequences.
+// A special case is the dashboard_acl table where we keep the default permissions.
+func (db *Sqlite3) TruncateDBTables() error {
+	tables, err := db.engine.DBMetas()
+	if err != nil {
+		return err
+	}
+
+	sess := db.engine.NewSession()
+	defer sess.Close()
+
+	for _, table := range tables {
+		switch table.Name {
+		case "dashboard_acl":
+			// keep default dashboard permissions
+			if _, err := sess.Exec(fmt.Sprintf("DELETE FROM %q WHERE dashboard_id != -1 AND org_id != -1;", table.Name)); err != nil {
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+			if _, err := sess.Exec("UPDATE sqlite_sequence SET seq = 2 WHERE name = '%s';", table.Name); err != nil {
+				return errutil.Wrapf(err, "failed to cleanup sqlite_sequence")
+			}
+		default:
+			if _, err := sess.Exec(fmt.Sprintf("DELETE FROM %s;", table.Name)); err != nil {
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+		}
+	}
+	if _, err := sess.Exec("UPDATE sqlite_sequence SET seq = 0 WHERE name != 'dashboard_acl';"); err != nil {
+		return errutil.Wrapf(err, "failed to cleanup sqlite_sequence")
+	}
+	return nil
+}
+
 func (db *Sqlite3) isThisError(err error, errcode int) bool {
 	if driverErr, ok := err.(sqlite3.Error); ok {
 		if int(driverErr.ExtendedCode) == errcode {