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: oci_test.go
    path of file: ./repos/vault/physical/oci
    
    the code of the file until where you have to start completion: // Copyright Â© 2019, Oracle and/or its affiliates.
package oci

import (
	"os"
	"testing"

	log "github.com/hashicorp/go-hclog"
	"github.com/hashicorp/go-uuid"
	"github.com/hashicorp/vault/sdk/helper/logging"
	"github.com/hashicorp/vault/sdk/physical"
	"github.com/oracle/oci-go-sdk/comm
    
func createBackend(bucketName string, namespaceName string, haEnabledStr string, lockBucketName string, t *testing.T) physical.Backend {
	backend, err := NewBackend(map[string]string{
		"auth_type_api_key": "true",
		"bucket_name":       bucketName,
		"namespace_name":    namespaceName,
		"ha_enabled":        haEnabledStr,
		"lock_bucket_name":  lockBucketName,
	}, logging.NewVaultLogger(log.Trace))
	if err != nil {
		t.Fatalf("Failed to create new backend: %v", err)
	}
	return backend
}