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: helpers.go
    path of file: ./repos/gocryptfs/tests/test_helpers
    
    the code of the file until where you have to start completion: package test_helpers

import (
	"bytes"
	"crypto/md5"
	"encoding/hex"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"syscall"
	"testing"

	"github.com/rfjakob/gocryptfs/v2/ctlsock"
	"github.com/rfjakob/gocryptfs/v2/internal/nametran
    
func VerifyExistence(t *testing.T, path string) bool {
	t.Helper()
	// Check if file can be stat()ed
	stat := true
	fi, err := os.Stat(path)
	if err != nil {
		stat = false
	}
	// Check if file can be opened
	open := true
	fd, err := os.Open(path)
	if err != nil {
		open = false
	}
	fd.Close()
	// Check if file shows up in directory listing
	readdir := false
	dir := filepath.Dir(path)
	name := filepath.Base(path)
	d, err := os.Open(dir)
	if err != nil && open {
		t.Errorf("VerifyExistence: we can open the file but not the parent dir!? err=%v", err)
	} else if err == nil {
		defer d.Close()
		listing, err := d.Readdirnames(0)
		if stat && fi.IsDir() && err != nil {
			t.Errorf("VerifyExistence: It's a directory, but readdirnames failed: %v", err)
		}
		for _, entry := range listing {
			if entry == name {
				readdir = true
			}
		}
	}
	// If the result is consistent, return it.
	if stat == open && open == readdir {
		return stat
	}
	t.Errorf("VerifyExistence: inconsistent result on %q: stat=%v open=%v readdir=%v, path=%q", name, stat, open, readdir, path)
	return false
}