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: template_test.go
    path of file: ./repos/cockroach/pkg/sql/catalog/randgen
    
    the code of the file until where you have to start completion: // Copyright 2022 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 randgen

import (
	"reflect"
	"strings"
	"testing"

	"github.com/cockroachdb/cockroach/pkg/sql/catalog/desctestutils"
    
func TestStartTemplateIsNotStale(t *testing.T) {
	initialProto := startDescriptor()
	{
		// Populate the template with dummy values to pass validation.
		initialProto.ID = 123
		initialProto.ParentID = 456
		initialProto.UnexposedParentSchemaID = 789
		initialProto.Name = "test"
		initialProto.PrimaryIndex.Name = tabledesc.PrimaryKeyIndexName(initialProto.Name)
	}
	b := tabledesc.NewBuilder(&initialProto)
	require.NoError(t, b.RunPostDeserializationChanges())
	tbl := b.BuildCreatedMutableTable()
	require.NoError(t, desctestutils.TestingValidateSelf(tbl))
	if finalProto := tbl.TableDescriptor; !reflect.DeepEqual(initialProto, finalProto) {
		diff := strings.Join(pretty.Diff(initialProto, finalProto), "\n")
		t.Fatalf("Descriptor protobufs should be equal but aren't:\n%s", diff)
	}
}