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: read_write_test.go
    path of file: ./repos/rclone/vfs
    
    the code of the file until where you have to start completion: package vfs

import (
	"context"
	"errors"
	"fmt"
	"io"
	"os"
	"testing"
	"time"

	"gi
    
func TestRWFileHandleFlushRead(t *testing.T) {
	_, _, fh := rwHandleCreateReadOnly(t)

	// Check Flush does nothing if read not called
	err := fh.Flush()
	assert.NoError(t, err)
	assert.False(t, fh.closed)

	// Read data
	buf := make([]byte, 256)
	n, err := fh.Read(buf)
	assert.True(t, err == io.EOF || err == nil)
	assert.Equal(t, 16, n)

	// Check Flush does nothing if read called
	err = fh.Flush()
	assert.NoError(t, err)
	assert.False(t, fh.closed)

	// Check flush does nothing if called again
	err = fh.Flush()
	assert.NoError(t, err)
	assert.False(t, fh.closed)

	// Properly close the file
	assert.NoError(t, fh.Close())
}