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: fill_bytes_test.go
    path of file: ./repos/td/crypto
    
    the code of the file until where you have to start completion: package crypto

import (
	"crypto/rand"
	"testing"

	"github.com/stretchr/testify/require"
)

func Tes
    
func TestFillBytes(t *testing.T) {
	tests := []struct {
		name    string
		bitSize int
		result  bool
	}{
		{"Smaller", 255, true},
		{"Equal", 256, true},
		{"Bigger", 512, false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			a := require.New(t)
			b, err := rand.Prime(rand.Reader, tt.bitSize)
			a.NoError(err)

			var to [256 / 8]byte
			a.Equal(tt.result, FillBytes(b, to[:]))
		})
	}
}