package cache import (	"errors"	"fmt"	"testing" 	"github.com/rclone/rclone/fs"	"github.com/rclone/rclone/fstest/mockfs"	"github.com/stretchr/testify/assert"	"github.com/stretchr/testify/require") var (	called      = 0	errSentinel = errors.New("an error")) func mockNewFs(t *testing.T) (func(), func(path string) (fs.Fs, error)) {	called = 0	create := func(path string) (fs.Fs, error) {		assert.Equal(t, 0, called)		called++		switch path {		case "/":			return mockfs.NewFs("mock", "mock"), nil		case "/file.txt":			return mockfs.NewFs("mock", "mock"), fs.ErrorIsFile		case "/error":			return nil, errSentinel		}		panic(fmt.Sprintf("Unknown path %q", path))	}	cleanup := func() {		c.Clear()	}	return cleanup, create} func TestGet(t *testing.T) {	cleanup, create := mockNewFs(t)	defer cleanup() 	assert.Equal(t, 0, c.Entries()) 	f, err := GetFn("/", create)	require.NoError(t, err) 	assert.Equal(t, 1, c.Entries()) 	f2, err := GetFn("/", create)	require.NoError(t, err) 	assert.Equal(t, f, f2)} func TestGetFile(t *testing.T) {	cleanup, create := mockNewFs(t)	defer cleanup() 	assert.Equal(t, 0, c.Entries()) 	f, err := GetFn("/file.txt", create)	require.Equal(t, fs.ErrorIsFile, err)	require.NotNil(t, f) 	assert.Equal(t, 1, c.Entries()) 	f2, err := GetFn("/file.txt", create)	require.Equal(t, fs.ErrorIsFile, err)	require.NotNil(t, f2) 	assert.Equal(t, f, f2)} func TestGetError(t *testing.T) {	cleanup, create := mockNewFs(t)	defer cleanup() 	assert.Equal(t, 0, c.Entries()) 	f, err := GetFn("/error", create)	require.Equal(t, errSentinel, err)	require.Equal(t, nil, f) 	assert.Equal(t, 0, c.Entries())} func TestPut(t *testing.T) {	cleanup, create := mockNewFs(t)	defer cleanup() 	f := mockfs.NewFs("mock", "mock") 	assert.Equal(t, 0, c.Entries()) 	Put("/alien", f) 	assert.Equal(t, 1, c.Entries()) 	fNew, err := GetFn("/alien", create)	require.NoError(t, err)	require.Equal(t, f, fNew) 	assert.Equal(t, 1, c.Entries())}