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: compact_map_cases_test.go
    path of file: ./repos/seaweedfs/weed/storage/needle_map
    
    the code of the file until where you have to start completion: //go:build 5BytesOffset
// +build 5BytesOffset

package needle_map

import (
	"fmt"
	"github.com/seaweedfs/seaweedfs/weed/storage/types"
	"github.com/stretchr/testify/assert"
	"log"
	"os"
	"testing"
)

func Test5bytesIndexLoading(t *testing.T) {

	indexFile, ie := os.OpenFile(".
    
func Test5bytesIndexLoading(t *testing.T) {

	indexFile, ie := os.OpenFile("../../../test/data/187.idx", os.O_RDWR|os.O_RDONLY, 0644)
	if ie != nil {
		log.Fatalln(ie)
	}
	defer indexFile.Close()
	m, rowCount := loadNewNeedleMap(indexFile)

	println("total entries:", rowCount)

	key := types.NeedleId(0x671b905) // 108116229

	needle, found := m.Get(types.NeedleId(0x671b905))

	fmt.Printf("%v key:%v offset:%v size:%v\n", found, key, needle.Offset, needle.Size)

	assert.Equal(t, int64(12884911892)*8, needle.Offset.ToActualOffset(), "offset")

}