test: coverage for foreign key violation err (#6403)

* test: coverage for foreign key violation err

* test: enabled foreign keys constraint for sqlite

* test: enabled mysql& mssql for ErrForeignKeyViolate

* test: disabled mysql & updated sqlserver driver version

* test: skipped tidb

---------

Co-authored-by: Saeid Saeidee <s.saeidee@sensysgatso.com>

tests/error_translator_test.go

@@ -44,6 +44,8 @@ func TestSupportedDialectorWithErrDuplicatedKey(t *testing.T) {
 		return
 	}
 
+	DB.Migrator().DropTable(&City{})
+
 	if err = db.AutoMigrate(&City{}); err != nil {
 		t.Fatalf("failed to migrate cities table, got error: %v", err)
 	}
@@ -58,3 +60,52 @@ func TestSupportedDialectorWithErrDuplicatedKey(t *testing.T) {
 		t.Fatalf("expected err: %v got err: %v", gorm.ErrDuplicatedKey, err)
 	}
 }
+
+func TestSupportedDialectorWithErrForeignKeyViolated(t *testing.T) {
+	tidbSkip(t, "not support the foreign key feature")
+
+	type City struct {
+		gorm.Model
+		Name string `gorm:"unique"`
+	}
+
+	type Museum struct {
+		gorm.Model
+		Name   string `gorm:"unique"`
+		CityID uint
+		City   City `gorm:"Constraint:OnUpdate:CASCADE,OnDelete:CASCADE;FOREIGNKEY:CityID;References:ID"`
+	}
+
+	db, err := OpenTestConnection(&gorm.Config{TranslateError: true})
+	if err != nil {
+		t.Fatalf("failed to connect database, got error %v", err)
+	}
+
+	dialectors := map[string]bool{"sqlite": true, "postgres": true, "mysql": true, "sqlserver": true}
+	if supported, found := dialectors[db.Dialector.Name()]; !(found && supported) {
+		return
+	}
+
+	DB.Migrator().DropTable(&City{}, &Museum{})
+
+	if err = db.AutoMigrate(&City{}, &Museum{}); err != nil {
+		t.Fatalf("failed to migrate countries & cities tables, got error: %v", err)
+	}
+
+	city := City{Name: "Amsterdam"}
+
+	err = db.Create(&city).Error
+	if err != nil {
+		t.Fatalf("failed to create city: %v", err)
+	}
+
+	err = db.Create(&Museum{Name: "Eye Filmmuseum", CityID: city.ID}).Error
+	if err != nil {
+		t.Fatalf("failed to create museum: %v", err)
+	}
+
+	err = db.Create(&Museum{Name: "Dungeon", CityID: 123}).Error
+	if !errors.Is(err, gorm.ErrForeignKeyViolated) {
+		t.Fatalf("expected err: %v got err: %v", gorm.ErrForeignKeyViolated, err)
+	}
+}

tests/go.mod

@@ -4,15 +4,13 @@ go 1.16
 
 require (
 	github.com/google/uuid v1.3.0
-	github.com/jackc/pgx/v5 v5.3.1 // indirect
 	github.com/jinzhu/now v1.1.5
-	github.com/lib/pq v1.10.8
+	github.com/lib/pq v1.10.9
-	github.com/mattn/go-sqlite3 v1.14.16 // indirect
+	gorm.io/driver/mysql v1.5.2-0.20230612053416-48b6526a21f0
-	gorm.io/driver/mysql v1.5.0
+	gorm.io/driver/postgres v1.5.3-0.20230607070428-18bc84b75196
-	gorm.io/driver/postgres v1.5.0
+	gorm.io/driver/sqlite v1.5.2
-	gorm.io/driver/sqlite v1.5.0
+	gorm.io/driver/sqlserver v1.5.2-0.20230613072041-6e2cde390b0a
-	gorm.io/driver/sqlserver v1.5.1
+	gorm.io/gorm v1.25.2-0.20230610234218-206613868439
-	gorm.io/gorm v1.25.1
 )
 
 replace gorm.io/gorm => ../

tests/tests_test.go

@@ -89,7 +89,7 @@ func OpenTestConnection(cfg *gorm.Config) (db *gorm.DB, err error) {
 		db, err = gorm.Open(mysql.Open(dbDSN), cfg)
 	default:
 		log.Println("testing sqlite3...")
-		db, err = gorm.Open(sqlite.Open(filepath.Join(os.TempDir(), "gorm.db")), cfg)
+		db, err = gorm.Open(sqlite.Open(filepath.Join(os.TempDir(), "gorm.db?_foreign_keys=on")), cfg)
 	}
 
 	if err != nil {