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: jottacloud_internal_test.go
    path of file: ./repos/rclone/backend/jottacloud
    
    the code of the file until where you have to start completion: package jottacloud

import (
	"context"
	"crypto/md5"
	"fmt"
	"io"
	"testing"
	"time"

	"github.com/rclone/rclone/fs"
	"github.com/rclone/rclone/fstest"
	"github.com/rclone/rclone/fstest/fstests"
	"github.com/rclone/rclone/lib/random"
	"github.com/rclone/rclone/lib/readers"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestReadMD5(t *testing.T) {
	// Check readMD5 for different size and threshold
	for _, size := range []int64{0, 1024, 10 * 1024, 100 * 1024} {
		t.Run(fmt.Sprintf("%d", size), func(t *testing.T) {
			hashe
    
func TestReadMD5(t *testing.T) {
	// Check readMD5 for different size and threshold
	for _, size := range []int64{0, 1024, 10 * 1024, 100 * 1024} {
		t.Run(fmt.Sprintf("%d", size), func(t *testing.T) {
			hasher := md5.New()
			n, err := io.Copy(hasher, readers.NewPatternReader(size))
			require.NoError(t, err)
			assert.Equal(t, n, size)
			wantMD5 := fmt.Sprintf("%x", hasher.Sum(nil))
			for _, threshold := range []int64{512, 1024, 10 * 1024, 20 * 1024} {
				t.Run(fmt.Sprintf("%d", threshold), func(t *testing.T) {
					in := readers.NewPatternReader(size)
					gotMD5, out, cleanup, err := readMD5(in, size, threshold)
					defer cleanup()
					require.NoError(t, err)
					assert.Equal(t, wantMD5, gotMD5)

					// check md5hash of out
					hasher := md5.New()
					n, err := io.Copy(hasher, out)
					require.NoError(t, err)
					assert.Equal(t, n, size)
					outMD5 := fmt.Sprintf("%x", hasher.Sum(nil))
					assert.Equal(t, wantMD5, outMD5)
				})
			}
		})
	}
}