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: exif_test.go
    path of file: ./repos/gitlabhq/workhorse/internal/upload/exif
    
    the code of the file until where you have to start completion: package exif

import (
	"context"
	"io"
	"os"
	"strings"
	"testing"

	"github.com/stretchr/testify/req
    
func TestNewCleanerReadingAfterEOF(t *testing.T) {
	input, err := os.Open("testdata/sample_exif.jpg")
	require.NoError(t, err)
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	cleaner, err := NewCleaner(ctx, input)
	require.NoError(t, err, "Expected no error when creating cleaner command")

	_, err = io.Copy(io.Discard, cleaner)
	require.NoError(t, err, "Expected no error when reading output")

	buf := make([]byte, 1)
	size, err := cleaner.Read(buf)
	require.Equal(t, 0, size, "The output was already consumed by previous reads")
	require.Equal(t, io.EOF, err, "We return EOF")
}