t.Run("WithWriteValidatorAndToken", func(t *testing.T) {
	t.Parallel()
	db, clean := createTestDB(t)
	defer clean()

	sks := "CAESQBDFk9kSKooTZrbjTYXSGQkaW0U/kCudBFaLHzm8wOxzRR3Y3rFv7qQ9E0Zhgi4vP+k0vPg7NIbDo/+Cc3snNS0="
	skb, err := base64.StdEncoding.DecodeString(sks)
	checkErr(t, err)
	sk, err := crypto.UnmarshalPrivateKey(skb)
	checkErr(t, err)
	tok, err := db.connector.Net.GetToken(context.Background(), thread.NewLibp2pIdentity(sk))
	checkErr(t, err)

	c, err := db.NewCollection(CollectionConfig{
		Name:   "Person",
		Schema: util.SchemaFromInstance(&Person{}, false),
		WriteValidator: `
			return writer === 'bbaareicfdxmn5mlp52sd2e2gmgbc4lz75e2lz6b3gsdmhi77qjzxwjzvfu'
		`,
	})
	checkErr(t, err)

	newPerson := util.JSONFromInstance(Person{Name: "Alice", Age: 42})
	var res []core.InstanceID
	err = c.WriteTxn(func(txn *Txn) (err error) {
		res, err = txn.Create(newPerson)
		return
	}, WithTxnToken(tok))
	checkErr(t, err)

	newPerson = util.JSONFromInstance(Person{ID: res[0], Name: "Alice", Age: 51})
	err = c.WriteTxn(func(txn *Txn) (err error) {
		err = txn.Verify(newPerson)
		return
	})
	if err == nil {
		t.Fatal("write should have been invalid")
	}

	newPerson = util.JSONFromInstance(Person{ID: res[0], Name: "Alice", Age: 43})
	err = c.WriteTxn(func(txn *Txn) (err error) {
		err = txn.Verify(newPerson)
		return
	}, WithTxnToken(tok))
	checkErr(t, err)
})