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>

pkg/services/sqlstore/alert_notification_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/alert_test.go

+// +build integration
+
 package sqlstore
 
 import (
@@ -128,7 +130,7 @@ func TestAlertingDataAccess(t *testing.T) {
 			So(alert.DashboardSlug, ShouldEqual, "dashboard-with-alerts")
 		})
 
-		Convey("Viewer cannot read alerts", func() {
+		Convey("Viewer can read alerts", func() {
 			viewerUser := &models.SignedInUser{OrgRole: models.ROLE_VIEWER, OrgId: 1}
 			alertQuery := models.GetAlertsQuery{DashboardIDs: []int64{testDash.Id}, PanelId: 1, OrgId: 1, User: viewerUser}
 			err2 := HandleAlertsQuery(&alertQuery)

pkg/services/sqlstore/annotation_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/apikey_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_acl_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_folder_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_provisioning_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_service_integration_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_snapshot_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/dashboard_version_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/datasource_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/login_attempt_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/migrator/dialect.go

@@ -45,6 +45,7 @@ type Dialect interface {
 	PostInsertId(table string, sess *xorm.Session) error
 
 	CleanDB() error
+	TruncateDBTables() error
 	NoOpSql() string
 
 	IsUniqueConstraintViolation(err error) bool
@@ -270,3 +271,7 @@ func (db *BaseDialect) CleanDB() error {
 func (db *BaseDialect) NoOpSql() string {
 	return "SELECT 0;"
 }
+
+func (db *BaseDialect) TruncateDBTables() error {
+	return nil
+}

pkg/services/sqlstore/migrator/mysql_dialect.go

 package migrator
 
 import (
+	"fmt"
 	"strconv"
 	"strings"
 
@@ -137,6 +138,36 @@ func (db *Mysql) CleanDB() error {
 	return nil
 }
 
+// TruncateDBTables truncates all the tables.
+// A special case is the dashboard_acl table where we keep the default permissions.
+func (db *Mysql) 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 %v WHERE dashboard_id != -1 AND org_id != -1;", db.Quote(table.Name))); err != nil {
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+			if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE %v AUTO_INCREMENT = 3;", db.Quote(table.Name))); err != nil {
+				return errutil.Wrapf(err, "failed to reset table %q", table.Name)
+			}
+		default:
+			if _, err := sess.Exec(fmt.Sprintf("TRUNCATE TABLE %v;", db.Quote(table.Name))); err != nil {
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+		}
+	}
+
+	return nil
+}
+
 func (db *Mysql) isThisError(err error, errcode uint16) bool {
 	if driverErr, ok := err.(*mysql.MySQLError); ok {
 		if driverErr.Number == errcode {

pkg/services/sqlstore/migrator/postgres_dialect.go

@@ -140,6 +140,37 @@ func (db *Postgres) CleanDB() error {
 	return nil
 }
 
+// TruncateDBTables truncates all the tables.
+// A special case is the dashboard_acl table where we keep the default permissions.
+func (db *Postgres) TruncateDBTables() error {
+	sess := db.engine.NewSession()
+	defer sess.Close()
+
+	for _, table := range db.engine.Tables {
+		switch table.Name {
+		case "":
+			continue
+		case "dashboard_acl":
+			// keep default dashboard permissions
+			if _, err := sess.Exec(fmt.Sprintf("DELETE FROM %v WHERE dashboard_id != -1 AND org_id != -1;", db.Quote(table.Name))); err != nil {
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+			if _, err := sess.Exec(fmt.Sprintf("ALTER SEQUENCE %v RESTART WITH 3;", db.Quote(fmt.Sprintf("%v_id_seq", table.Name)))); err != nil {
+				return errutil.Wrapf(err, "failed to reset table %q", table.Name)
+			}
+		default:
+			if _, err := sess.Exec(fmt.Sprintf("TRUNCATE TABLE %v RESTART IDENTITY CASCADE;", db.Quote(table.Name))); err != nil {
+				if db.isUndefinedTable(err) {
+					continue
+				}
+				return errutil.Wrapf(err, "failed to truncate table %q", table.Name)
+			}
+		}
+	}
+
+	return nil
+}
+
 func (db *Postgres) isThisError(err error, errcode string) bool {
 	if driverErr, ok := err.(*pq.Error); ok {
 		if string(driverErr.Code) == errcode {
@@ -157,6 +188,10 @@ func (db *Postgres) ErrorMessage(err error) string {
 	return ""
 }
 
+func (db *Postgres) isUndefinedTable(err error) bool {
+	return db.isThisError(err, "42P01")
+}
+
 func (db *Postgres) IsUniqueConstraintViolation(err error) bool {
 	return db.isThisError(err, "23505")
 }

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 {

pkg/services/sqlstore/org_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/playlist_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/preferences_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/quota_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/searchstore/search_test.go

+// +build integration
+
 // package search_test contains integration tests for search
 package searchstore_test
 

pkg/services/sqlstore/sqlbuilder_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/sqlstore.go

@@ -340,13 +340,16 @@ type ITestDB interface {
 	Logf(format string, args ...interface{})
 }
 
+var testSqlStore *SqlStore
+
 // InitTestDB initializes the test DB.
 func InitTestDB(t ITestDB) *SqlStore {
 	t.Helper()
-	sqlstore := &SqlStore{}
-	sqlstore.Bus = bus.New()
-	sqlstore.CacheService = localcache.New(5*time.Minute, 10*time.Minute)
-	sqlstore.skipEnsureDefaultOrgAndUser = true
+	if testSqlStore == nil {
+		testSqlStore = &SqlStore{}
+		testSqlStore.Bus = bus.New()
+		testSqlStore.CacheService = localcache.New(5*time.Minute, 10*time.Minute)
+		testSqlStore.skipEnsureDefaultOrgAndUser = true
 
 		dbType := migrator.SQLITE
 
@@ -357,8 +360,8 @@ func InitTestDB(t ITestDB) *SqlStore {
 		}
 
 		// set test db config
-	sqlstore.Cfg = setting.NewCfg()
-	sec, err := sqlstore.Cfg.Raw.NewSection("database")
+		testSqlStore.Cfg = setting.NewCfg()
+		sec, err := testSqlStore.Cfg.Raw.NewSection("database")
 		if err != nil {
 			t.Fatalf("Failed to create section: %s", err)
 		}
@@ -388,24 +391,29 @@ func InitTestDB(t ITestDB) *SqlStore {
 			t.Fatalf("Failed to init test database: %v", err)
 		}
 
-	sqlstore.Dialect = migrator.NewDialect(engine)
+		testSqlStore.Dialect = migrator.NewDialect(engine)
 
 		// temp global var until we get rid of global vars
-	dialect = sqlstore.Dialect
+		dialect = testSqlStore.Dialect
 
 		t.Logf("Cleaning DB")
 		if err := dialect.CleanDB(); err != nil {
 			t.Fatalf("Failed to clean test db %v", err)
 		}
 
-	if err := sqlstore.Init(); err != nil {
+		if err := testSqlStore.Init(); err != nil {
 			t.Fatalf("Failed to init test database: %v", err)
 		}
 
-	sqlstore.engine.DatabaseTZ = time.UTC
-	sqlstore.engine.TZLocation = time.UTC
+		testSqlStore.engine.DatabaseTZ = time.UTC
+		testSqlStore.engine.TZLocation = time.UTC
+	}
+
+	if err := dialect.TruncateDBTables(); err != nil {
+		t.Fatalf("Failed to truncate test db %v", err)
+	}
 
-	return sqlstore
+	return testSqlStore
 }
 
 func IsTestDbMySql() bool {

pkg/services/sqlstore/sqlstore_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/stars_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/stats_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/tags_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/team_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/temp_user_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/transactions_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/user_auth_test.go

+// +build integration
+
 package sqlstore
 
 import (

pkg/services/sqlstore/user_test.go

+// +build integration
+
 package sqlstore
 
 import (