recordDelimiter: "%!",
			fieldDelimiter:  ",",
			sendErr:         nil,
			header:          false,
			wantColumns:     []string{"_1", "_2", "_3"},
			wantFields:      "a,b,c\na2,b2,c2%\n",
			wantErr:         io.EOF,
		},
	}

	for i, c := range cases {
		t.Run(c.file, func(t *testing.T) {
			var err error
			var record sql.Record
			var result bytes.Buffer

	DB.Migrator().DropTable(&LevelC3{}, &LevelC2{}, &LevelC1{})
	if err := DB.AutoMigrate(&LevelC1{}, &LevelC2{}, &LevelC3{}); err != nil {
		t.Error(err)
	}

	level2 := LevelC2{
		Value: "c2",
		LevelC1: LevelC1{
			Value: "c1",
		},
	}
	DB.Create(&level2)

	want := []LevelC3{
		{
			Value:   "c3-1",
			LevelC2: level2,
		}, {
			Value:   "c3-2",
			LevelC2: level2,

	DB.AutoMigrate(&Org{}, &EmbeddedAddress{}, &Country{})

	org := Org{
		PostalAddress:   EmbeddedAddress{Name: "a1", Country: &Country{Name: "c1"}},
		VisitingAddress: EmbeddedAddress{Name: "a2", Country: &Country{Name: "c2"}},
		Address:         &EmbeddedAddress{Name: "a3", Country: &Country{Name: "c3"}},
		NestedAddress: NestedAddress{
			EmbeddedAddress: EmbeddedAddress{Name: "a4", Country: &Country{Name: "c4"}},
		},
	}