mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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362 lines
9.3 KiB
Go
362 lines
9.3 KiB
Go
// Copyright 2012 The LevelDB-Go and Pebble Authors. All rights reserved. Use
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// of this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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package vfs
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"runtime"
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"sort"
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"strings"
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"testing"
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"github.com/cockroachdb/datadriven"
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"github.com/cockroachdb/errors"
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"github.com/cockroachdb/errors/oserror"
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"github.com/stretchr/testify/require"
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)
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func normalizeError(err error) error {
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// It is OS-specific which errors match IsExist, IsNotExist, and
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// IsPermission, with OS-specific error messages. We normalize to the
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// oserror.Err* errors which have standard error messages across
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// platforms.
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switch {
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case oserror.IsExist(err):
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return oserror.ErrExist
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case oserror.IsNotExist(err):
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return oserror.ErrNotExist
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case oserror.IsPermission(err):
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return oserror.ErrPermission
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}
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return err
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}
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// vfsTestFS is similar to loggingFS but is more specific to the vfs test. It
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// logs more operations and logs return values and errors.
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// It also supports injecting an error on Link.
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type vfsTestFS struct {
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FS
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base string
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w io.Writer
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linkErr error
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}
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func (fs vfsTestFS) stripBase(path string) string {
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if strings.HasPrefix(path, fs.base+"/") {
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return path[len(fs.base)+1:]
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}
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return path
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}
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func (fs vfsTestFS) Create(name string) (File, error) {
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f, err := fs.FS.Create(name)
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fmt.Fprintf(fs.w, "create: %s [%v]\n", fs.stripBase(name), normalizeError(err))
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return vfsTestFSFile{f, fs.PathBase(name), fs.w}, err
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}
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func (fs vfsTestFS) Link(oldname, newname string) error {
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err := fs.linkErr
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if err == nil {
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err = fs.FS.Link(oldname, newname)
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}
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fmt.Fprintf(fs.w, "link: %s -> %s [%v]\n",
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fs.stripBase(oldname), fs.stripBase(newname), normalizeError(err))
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return err
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}
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func (fs vfsTestFS) ReuseForWrite(oldname, newname string) (File, error) {
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f, err := fs.FS.ReuseForWrite(oldname, newname)
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if err == nil {
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f = vfsTestFSFile{f, fs.PathBase(newname), fs.w}
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}
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fmt.Fprintf(fs.w, "reuseForWrite: %s -> %s [%v]\n",
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fs.stripBase(oldname), fs.stripBase(newname), normalizeError(err))
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return f, err
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}
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func (fs vfsTestFS) MkdirAll(dir string, perm os.FileMode) error {
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err := fs.FS.MkdirAll(dir, perm)
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fmt.Fprintf(fs.w, "mkdir: %s [%v]\n", fs.stripBase(dir), normalizeError(err))
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return err
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}
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func (fs vfsTestFS) Open(name string, opts ...OpenOption) (File, error) {
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f, err := fs.FS.Open(name, opts...)
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fmt.Fprintf(fs.w, "open: %s [%v]\n", fs.stripBase(name), normalizeError(err))
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return vfsTestFSFile{f, fs.stripBase(name), fs.w}, err
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}
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func (fs vfsTestFS) Remove(name string) error {
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err := fs.FS.Remove(name)
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fmt.Fprintf(fs.w, "remove: %s [%v]\n", fs.stripBase(name), normalizeError(err))
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return err
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}
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func (fs vfsTestFS) RemoveAll(name string) error {
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err := fs.FS.RemoveAll(name)
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fmt.Fprintf(fs.w, "remove-all: %s [%v]\n", fs.stripBase(name), normalizeError(err))
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return err
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}
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type vfsTestFSFile struct {
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File
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name string
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w io.Writer
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}
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func (f vfsTestFSFile) Close() error {
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err := f.File.Close()
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fmt.Fprintf(f.w, "close: %s [%v]\n", f.name, err)
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return err
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}
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func (f vfsTestFSFile) Preallocate(off, n int64) error {
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err := f.File.Preallocate(off, n)
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fmt.Fprintf(f.w, "preallocate(off=%d,n=%d): %s [%v]\n", off, n, f.name, err)
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return err
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}
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func (f vfsTestFSFile) Sync() error {
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err := f.File.Sync()
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fmt.Fprintf(f.w, "sync: %s [%v]\n", f.name, err)
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return err
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}
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func (f vfsTestFSFile) SyncData() error {
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err := f.File.SyncData()
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fmt.Fprintf(f.w, "sync-data: %s [%v]\n", f.name, err)
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return err
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}
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func (f vfsTestFSFile) SyncTo(length int64) (fullSync bool, err error) {
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fullSync, err = f.File.SyncTo(length)
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fmt.Fprintf(f.w, "sync-to(%d): %s [%t,%v]\n", length, f.name, fullSync, err)
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return fullSync, err
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}
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func runTestVFS(t *testing.T, baseFS FS, dir string) {
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var buf bytes.Buffer
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fs := vfsTestFS{FS: baseFS, base: dir, w: &buf}
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datadriven.RunTest(t, "testdata/vfs", func(t *testing.T, td *datadriven.TestData) string {
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switch td.Cmd {
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case "define":
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buf.Reset()
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for _, arg := range td.CmdArgs {
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switch arg.Key {
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case "linkErr":
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if len(arg.Vals) != 1 {
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return fmt.Sprintf("%s: %s expected 1 value", td.Cmd, arg.Key)
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}
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switch arg.Vals[0] {
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case "ErrExist":
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fs.linkErr = oserror.ErrExist
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case "ErrNotExist":
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fs.linkErr = oserror.ErrNotExist
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case "ErrPermission":
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fs.linkErr = oserror.ErrPermission
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default:
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fs.linkErr = errors.New(arg.Vals[0])
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}
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default:
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return fmt.Sprintf("%s: unknown arg: %s", td.Cmd, arg.Key)
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}
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}
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for _, line := range strings.Split(td.Input, "\n") {
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parts := strings.Fields(line)
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if len(parts) == 0 {
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return "<op> [<args>]"
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}
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switch parts[0] {
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case "clone":
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if len(parts) < 3 {
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return "clone <src> <dest> [disk|mem] [link] [sync]"
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}
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dstFS := fs
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var opts []CloneOption
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for _, p := range parts[3:] {
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switch p {
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case "disk":
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dstFS = vfsTestFS{FS: Default, base: dir, w: &buf}
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case "mem":
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dstFS = vfsTestFS{FS: NewMem(), base: dir, w: &buf}
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case "link":
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opts = append(opts, CloneTryLink)
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case "sync":
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opts = append(opts, CloneSync)
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default:
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return fmt.Sprintf("unrecognized argument %q", p)
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}
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}
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_, _ = Clone(fs, dstFS, fs.PathJoin(dir, parts[1]), fs.PathJoin(dir, parts[2]), opts...)
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case "create":
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if len(parts) != 2 {
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return "create <name>"
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}
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f, _ := fs.Create(fs.PathJoin(dir, parts[1]))
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f.Close()
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case "link":
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if len(parts) != 3 {
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return "link <oldname> <newname>"
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}
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_ = fs.Link(fs.PathJoin(dir, parts[1]), fs.PathJoin(dir, parts[2]))
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case "link-or-copy":
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if len(parts) != 3 {
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return "link-or-copy <oldname> <newname>"
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}
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_ = LinkOrCopy(fs, fs.PathJoin(dir, parts[1]), fs.PathJoin(dir, parts[2]))
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case "reuseForWrite":
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if len(parts) != 3 {
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return "reuseForWrite <oldname> <newname>"
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}
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_, _ = fs.ReuseForWrite(fs.PathJoin(dir, parts[1]), fs.PathJoin(dir, parts[2]))
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case "list":
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if len(parts) != 2 {
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return "list <dir>"
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}
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paths, _ := fs.List(fs.PathJoin(dir, parts[1]))
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sort.Strings(paths)
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for _, p := range paths {
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fmt.Fprintln(&buf, p)
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}
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case "mkdir":
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if len(parts) != 2 {
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return "mkdir <dir>"
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}
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_ = fs.MkdirAll(fs.PathJoin(dir, parts[1]), 0755)
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case "remove":
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if len(parts) != 2 {
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return "remove <name>"
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}
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_ = fs.Remove(fs.PathJoin(dir, parts[1]))
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case "remove-all":
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if len(parts) != 2 {
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return "remove-all <name>"
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}
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_ = fs.RemoveAll(fs.PathJoin(dir, parts[1]))
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}
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}
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return buf.String()
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default:
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return fmt.Sprintf("unknown command: %s", td.Cmd)
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}
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})
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}
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func TestVFS(t *testing.T) {
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t.Run("mem", func(t *testing.T) {
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runTestVFS(t, NewMem(), "")
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})
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if runtime.GOOS != "windows" {
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t.Run("disk", func(t *testing.T) {
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dir, err := os.MkdirTemp("", "test-vfs")
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require.NoError(t, err)
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defer func() {
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_ = os.RemoveAll(dir)
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}()
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runTestVFS(t, Default, dir)
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})
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}
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}
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func TestVFSGetDiskUsage(t *testing.T) {
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dir, err := os.MkdirTemp("", "test-free-space")
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require.NoError(t, err)
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defer func() {
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_ = os.RemoveAll(dir)
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}()
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_, err = Default.GetDiskUsage(dir)
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require.Nil(t, err)
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}
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func TestVFSCreateLinkSemantics(t *testing.T) {
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dir, err := os.MkdirTemp("", "test-create-link")
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require.NoError(t, err)
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defer func() { _ = os.RemoveAll(dir) }()
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for _, fs := range []FS{Default, NewMem()} {
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t.Run(fmt.Sprintf("%T", fs), func(t *testing.T) {
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writeFile := func(path, contents string) {
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path = fs.PathJoin(dir, path)
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f, err := fs.Create(path)
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require.NoError(t, err)
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_, err = f.Write([]byte(contents))
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require.NoError(t, err)
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require.NoError(t, f.Close())
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}
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readFile := func(path string) string {
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path = fs.PathJoin(dir, path)
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f, err := fs.Open(path)
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require.NoError(t, err)
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b, err := io.ReadAll(f)
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require.NoError(t, err)
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require.NoError(t, f.Close())
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return string(b)
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}
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require.NoError(t, fs.MkdirAll(dir, 0755))
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// Write a file 'foo' and create a hardlink at 'bar'.
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writeFile("foo", "foo")
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require.NoError(t, fs.Link(fs.PathJoin(dir, "foo"), fs.PathJoin(dir, "bar")))
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// Both files should contain equal contents, because they're backed by
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// the same inode.
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require.Equal(t, "foo", readFile("foo"))
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require.Equal(t, "foo", readFile("bar"))
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// Calling Create on 'bar' must NOT truncate 'foo'. It should create a
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// new file at path 'bar' with a new inode.
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writeFile("bar", "bar")
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require.Equal(t, "foo", readFile("foo"))
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require.Equal(t, "bar", readFile("bar"))
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})
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}
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}
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// TestVFSRootDirName ensures that opening the root directory on both the
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// Default and MemFS works and returns a File which has the name of the
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// path separator.
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func TestVFSRootDirName(t *testing.T) {
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for _, fs := range []FS{Default, NewMem()} {
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sep := sep
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if fs == Default {
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sep = string(os.PathSeparator)
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}
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rootDir, err := fs.Open(sep)
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require.NoError(t, err)
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fi, err := rootDir.Stat()
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require.NoError(t, err)
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require.Equal(t, sep, fi.Name())
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}
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}
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// TestOpType is intended to catch operations that have been added without an
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// associated string, which could result in a runtime panic.
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func TestOpType(t *testing.T) {
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for i := 0; i < int(opTypeMax); i++ {
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require.NotPanics(t, func() {
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_ = OpType(i).String()
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})
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}
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}
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