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: docdb_test.go
    path of file: ./repos/go-cloud/docstore/mongodocstore
    
    the code of the file until where you have to start completion: package mongodocstore

import (
	"context"
	"fmt"
	"os"
	"testing"

	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"gocloud.dev/docstore/drivertest"
	"gocloud.dev/internal/testing/setup"

    
func TestConformanceDocDB(t *testing.T) {
	if !*setup.Record {
		t.Skip("replaying is not yet supported for Amazon DocumentDB")
	}
	if username == "" || password == "" {
		t.Fatal("environment not setup to run DocDB test")
	}

	client := newDocDBTestClient(t)
	defer client.Disconnect(context.Background())

	newHarness := func(context.Context, *testing.T) (drivertest.Harness, error) {
		return &harness{db: client.Database(dbName)}, nil
	}
	drivertest.RunConformanceTests(t, newHarness, codecTester{}, []drivertest.AsTest{verifyAs{}})
}