You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: client_test.go
    path of file: ./repos/cockroach/pkg/kv
    
    the code of the file until where you have to start completion: // Copyright 2014 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.

/*
	Package client_test tests clients against a fully-instantiated

cockroach cluster (a single node, but bootstrapped, gossiped, etc.).
*/
package kv_test

import (
	"bytes"
	"contex
    
func TestClientEmptyValues(t *testing.T) {
	defer leaktest.AfterTest(t)()
	defer log.Scope(t).Close(t)
	s := serverutils.StartServerOnly(t, base.TestServerArgs{})
	defer s.Stopper().Stop(context.Background())
	db := createTestClient(t, s)

	if err := db.Put(context.Background(), testUser+"/a", []byte{}); err != nil {
		t.Error(err)
	}
	if gr, err := db.Get(context.Background(), testUser+"/a"); err != nil {
		t.Error(err)
	} else if bytes := gr.ValueBytes(); bytes == nil || len(bytes) != 0 {
		t.Errorf("expected non-nil empty byte slice; got %q", bytes)
	}

	if _, err := db.Inc(context.Background(), testUser+"/b", 0); err != nil {
		t.Error(err)
	}
	if gr, err := db.Get(context.Background(), testUser+"/b"); err != nil {
		t.Error(err)
	} else if gr.Value == nil {
		t.Errorf("expected non-nil integer")
	} else if gr.ValueInt() != 0 {
		t.Errorf("expected 0-valued integer, but got %d", gr.ValueInt())
	}
}