t.Fatalf("Got error %v", err)
	}

	var got []Level1
	if err := DB.Preload("Level2").Preload("Level2.Level3").Find(&got).Error; err != nil {
		t.Error(err)
	}

	if len(got) != 2 {
		t.Errorf("got %v items, expected 2", len(got))
	}

	if !reflect.DeepEqual(got[0], want) && !reflect.DeepEqual(got[1], want) {

	c.conn.got = append(c.conn.got, query)
	return c.Tx.QueryContext(ctx, query, args...)
}

func (c *wrapperTx) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row {
	c.conn.got = append(c.conn.got, query)
	return c.Tx.QueryRowContext(ctx, query, args...)
}

type wrapperConnPool struct {
	db     *sql.DB
	got    []string
	expect []string
}

		}
		if got, want := h2.Uname, v.h.Uname; got != want {
			t.Errorf("i=%d: Uname: got %q, want %q", i, got, want)
		}
		if got, want := h2.Gname, v.h.Gname; got != want {
			t.Errorf("i=%d: Gname: got %q, want %q", i, got, want)
		}
		if got, want := h2.Linkname, v.h.Linkname; got != want {
			t.Errorf("i=%d: Linkname: got %v, want %v", i, got, want)
		}

	} else if len(langs) != 1 {
		t.Errorf("should only find only 1 languages, but got %+v", langs)
	}

	lang3 := Language{Code: "upsert", Name: "Upsert"}
	if err := DB.Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "code"}},
		DoUpdates: clause.Assignments(map[string]interface{}{"name": "upsert-new"}),
	}).Create(&lang3).Error; err != nil {
		t.Fatalf("failed to upsert, got %v", err)
	}

		if testCase.errStr != "" {
			got := releaseTimeToReleaseTag(testCase.t)
			if got != testCase.tag && testCase.errStr == "" {
				t.Errorf("Test %d: Expected %v but got %v", i+1, testCase.tag, got)
			}
		}
		tagTime, err := releaseTagToReleaseTime(testCase.tag)
		if err != nil && err.Error() != testCase.errStr {
			t.Errorf("Test %d: Expected %v but got %v", i+1, testCase.errStr, err.Error())
		}

	}
	if want, got := int32(2), ps.NumSubscribers(Mask(1)); got != want {
		t.Fatalf("want %d subscribers, got %d", want, got)
	}
	if want, got := int32(2), ps.NumSubscribers(Mask(2)); got != want {
		t.Fatalf("want %d subscribers, got %d", want, got)
	}
	if want, got := int32(2), ps.NumSubscribers(Mask(1|2)); got != want {
		t.Fatalf("want %d subscribers, got %d", want, got)
	}

		if err != nil {
			t.Fatalf("failed to parse user unique, got error %v", err)
		}

		constraints := user.ParseUniqueConstraints()
		if len(constraints) != 1 {
			t.Fatalf("failed to find unique constraint, got %v", constraints)
		}

		for key := range constraints {
			if len(key) != 63 {
				t.Errorf("failed to find unique constraint, got %v", constraints)
			}
		}
	})

	}
	if len(parents) != 1 {
		t.Errorf("expected %d parents, got %d", 1, len(parents))
	}

	// test delete
	if err := tx.Model(&item).Association("ItemParent").Unscoped().Delete(&parents); err != nil {
		t.Errorf("failed to delete item parent, got error: %v", err)
	}
	if err := tx.Find(&parents).Error; err != nil {
		t.Errorf("failed to find item parent, got error: %v", err)
	}

	}

	if err := DB.Model(&User{}).Select("name, sum(age) as total").Where("name LIKE ?", "groupby%").Group("name").Having("name = ?", "groupby1").Row().Scan(&name, &total); err != nil {
		t.Errorf("no error should happen, but got %v", err)
	}

	if name != "groupby1" || total != 660 {
		t.Errorf("name should be groupby, but got %v, total should be 660, but got %v", name, total)
	}

			t.Fatalf("first expects: %v, got %v", u1, got)
		}

		results = DB.Select("id, name").Find(&got)
		if results.Error != nil {
			t.Fatalf("errors happened on first: %v", results.Error)
		} else if results.RowsAffected != 1 {
			t.Fatalf("rows affected expects: %v, got %v", 1, results.RowsAffected)
		} else if got.ID != u1.ID {
			t.Fatalf("select expects: %v, got %v", u1, got)
		}

		u1.Name = "jinzhu"