appendToResults := func(value reflect.Value) {
			if _, isZero := rel.Field.ValueOf(ctx, value); !isZero {
				result := reflect.Indirect(rel.Field.ReflectValueOf(ctx, value))
				switch result.Kind() {
				case reflect.Struct:
					reflectResults = reflect.Append(reflectResults, result.Addr())
				case reflect.Slice, reflect.Array:
					for i := 0; i < result.Len(); i++ {
						if elem := result.Index(i); elem.Kind() == reflect.Ptr {

// regardless of the presence of a WriteTo method.
func TestReaderCopyNothing(t *testing.T) {
	type nErr struct {
		n   int64
		err error
	}
	type justReader struct {
		io.Reader
	}
	type justWriter struct {
		io.Writer
	}
	discard := justWriter{io.Discard} // hide ReadFrom

	var with, withOut nErr
	with.n, with.err = io.Copy(discard, NewReader(nil))

package schema_test

import (
	"reflect"
	"sync"
	"testing"

	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils/tests"
)

type UserCheck struct {
	Name  string `gorm:"check:name_checker,name <> 'jinzhu'"`
	Name2 string `gorm:"check:name <> 'jinzhu'"`
	Name3 string `gorm:"check:,name <> 'jinzhu'"`
}

func TestParseCheck(t *testing.T) {
	user, err := schema.Parse(&UserCheck{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {

				}
			}
		}
	})
}

type Relation struct {
	Name        string
	Type        schema.RelationshipType
	Schema      string
	FieldSchema string
	Polymorphic Polymorphic
	JoinTable   JoinTable
	References  []Reference
}

type Polymorphic struct {
	ID    string
	Type  string
	Value string
}

type JoinTable struct {
	Name   string
	Table  string
	Fields []schema.Field

}

type noncurrentVersionsTask struct {
	bucket   string
	versions []ObjectToDelete
	events   []lifecycle.Event
}

type transitionTask struct {
	objInfo ObjectInfo
	src     lcEventSrc
	event   lifecycle.Event
}

type transitionState struct {
	transitionCh chan transitionTask

	ctx        context.Context
	objAPI     ObjectLayer

type formatErasureVersionDetect struct {
	Erasure struct {
		Version string `json:"version"`
	} `json:"xl"`
}

// Represents the V1 backend disk structure version
// under `.minio.sys` and actual data namespace.
// formatErasureV1 - structure holds format config version '1'.
type formatErasureV1 struct {
	formatMetaV1
	Erasure struct {
		Version string `json:"version"` // Version of 'xl' format.

}

// STSError structure
type STSError struct {
	Code           string
	Description    string
	HTTPStatusCode int
}

// STSErrorResponse - error response format
type STSErrorResponse struct {
	XMLName xml.Name `xml:"https://sts.amazonaws.com/doc/2011-06-15/ ErrorResponse" json:"-"`
	Error   struct {
		Type    string `xml:"Type"`
		Code    string `xml:"Code"`

	storageRESTOrigVolume       = "ovol"
	storageRESTInclFreeVersions = "incl-fv"
	storageRESTRange            = "rng"
)

type nsScannerOptions struct {
	DiskID   string          `msg:"id"`
	ScanMode int             `msg:"m"`
	Cache    *dataUsageCache `msg:"c"`
}

type nsScannerResp struct {
	Update *dataUsageEntry `msg:"u"`
	Final  *dataUsageCache `msg:"f"`

	}
}

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"`
	}

	})
}

func TestJoinsPreload_Issue7013_RelationEmpty(t *testing.T) {
	type (
		Furniture struct {
			gorm.Model
			OwnerID *uint
		}

		Owner struct {
			gorm.Model
			Furnitures []Furniture
			CompanyID  *uint
			Company    Company
		}

		Building struct {
			gorm.Model
			Name    string
			OwnerID *uint
			Owner   Owner
		}
	)