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mirror of https://github.com/octoleo/restic.git synced 2024-12-25 04:05:58 +00:00
restic/test/helpers.go
2016-01-24 17:47:45 +01:00

250 lines
5.6 KiB
Go

package test_helper
import (
"compress/bzip2"
"compress/gzip"
"crypto/rand"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"reflect"
"runtime"
"testing"
mrand "math/rand"
"github.com/restic/restic/backend"
"github.com/restic/restic/backend/local"
"github.com/restic/restic/repository"
)
// Assert fails the test if the condition is false.
func Assert(tb testing.TB, condition bool, msg string, v ...interface{}) {
if !condition {
_, file, line, _ := runtime.Caller(1)
fmt.Printf("\033[31m%s:%d: "+msg+"\033[39m\n\n", append([]interface{}{filepath.Base(file), line}, v...)...)
tb.FailNow()
}
}
// OK fails the test if an err is not nil.
func OK(tb testing.TB, err error) {
if err != nil {
_, file, line, _ := runtime.Caller(1)
fmt.Printf("\033[31m%s:%d: unexpected error: %s\033[39m\n\n", filepath.Base(file), line, err.Error())
tb.FailNow()
}
}
// OKs fails the test if any error from errs is not nil.
func OKs(tb testing.TB, errs []error) {
errFound := false
for _, err := range errs {
if err != nil {
errFound = true
_, file, line, _ := runtime.Caller(1)
fmt.Printf("\033[31m%s:%d: unexpected error: %s\033[39m\n\n", filepath.Base(file), line, err.Error())
}
}
if errFound {
tb.FailNow()
}
}
// Equals fails the test if exp is not equal to act.
func Equals(tb testing.TB, exp, act interface{}) {
if !reflect.DeepEqual(exp, act) {
_, file, line, _ := runtime.Caller(1)
fmt.Printf("\033[31m%s:%d:\n\n\texp: %#v\n\n\tgot: %#v\033[39m\n\n", filepath.Base(file), line, exp, act)
tb.FailNow()
}
}
// ParseID parses s as a backend.ID and panics if that fails.
func ParseID(s string) backend.ID {
id, err := backend.ParseID(s)
if err != nil {
panic(err)
}
return id
}
// Random returns size bytes of pseudo-random data derived from the seed.
func Random(seed, count int) []byte {
p := make([]byte, count)
rnd := mrand.New(mrand.NewSource(int64(seed)))
for i := 0; i < len(p); i += 8 {
val := rnd.Int63()
var data = []byte{
byte((val >> 0) & 0xff),
byte((val >> 8) & 0xff),
byte((val >> 16) & 0xff),
byte((val >> 24) & 0xff),
byte((val >> 32) & 0xff),
byte((val >> 40) & 0xff),
byte((val >> 48) & 0xff),
byte((val >> 56) & 0xff),
}
for j := range data {
cur := i + j
if len(p) >= cur {
break
}
p[cur] = data[j]
}
}
return p
}
type rndReader struct {
src *mrand.Rand
}
func (r *rndReader) Read(p []byte) (int, error) {
for i := 0; i < len(p); i += 8 {
val := r.src.Int63()
var data = []byte{
byte((val >> 0) & 0xff),
byte((val >> 8) & 0xff),
byte((val >> 16) & 0xff),
byte((val >> 24) & 0xff),
byte((val >> 32) & 0xff),
byte((val >> 40) & 0xff),
byte((val >> 48) & 0xff),
byte((val >> 56) & 0xff),
}
for j := range data {
cur := i + j
if len(p) >= cur {
break
}
p[cur] = data[j]
}
}
return len(p), nil
}
// RandomReader returns a reader that returns deterministic pseudo-random data
// derived from the seed.
func RandomReader(seed int) io.Reader {
return &rndReader{src: mrand.New(mrand.NewSource(int64(seed)))}
}
// RandomLimitReader returns a reader that returns size bytes of deterministic
// pseudo-random data derived from the seed.
func RandomLimitReader(seed, size int) io.Reader {
return io.LimitReader(RandomReader(seed), int64(size))
}
// GenRandom returns a []byte filled with up to 1000 random bytes.
func GenRandom(t testing.TB) []byte {
buf := make([]byte, mrand.Intn(1000))
_, err := io.ReadFull(rand.Reader, buf)
OK(t, err)
return buf
}
// SetupTarTestFixture extracts the tarFile to outputDir.
func SetupTarTestFixture(t testing.TB, outputDir, tarFile string) {
input, err := os.Open(tarFile)
defer input.Close()
OK(t, err)
var rd io.Reader
switch filepath.Ext(tarFile) {
case ".gz":
r, err := gzip.NewReader(input)
OK(t, err)
defer r.Close()
rd = r
case ".bzip2":
rd = bzip2.NewReader(input)
default:
rd = input
}
cmd := exec.Command("tar", "xf", "-")
cmd.Dir = outputDir
cmd.Stdin = rd
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
OK(t, cmd.Run())
}
// WithTestEnvironment creates a test environment, extracts the repository
// fixture and and calls f with the repository dir.
func WithTestEnvironment(t testing.TB, repoFixture string, f func(repodir string)) {
tempdir, err := ioutil.TempDir(TestTempDir, "restic-test-")
OK(t, err)
fd, err := os.Open(repoFixture)
if err != nil {
panic(err)
}
OK(t, fd.Close())
SetupTarTestFixture(t, tempdir, repoFixture)
f(filepath.Join(tempdir, "repo"))
if !TestCleanupTempDirs {
t.Logf("leaving temporary directory %v used for test", tempdir)
return
}
RemoveAll(t, tempdir)
}
// OpenLocalRepo opens the local repository located at dir.
func OpenLocalRepo(t testing.TB, dir string) *repository.Repository {
be, err := local.Open(dir)
OK(t, err)
repo := repository.New(be)
err = repo.SearchKey(TestPassword)
OK(t, err)
return repo
}
func isFile(fi os.FileInfo) bool {
return fi.Mode()&(os.ModeType|os.ModeCharDevice) == 0
}
// ResetReadOnly recursively resets the read-only flag recursively for dir.
// This is mainly used for tests on Windows, which is unable to delete a file
// set read-only.
func ResetReadOnly(t testing.TB, dir string) {
OK(t, filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
if fi.IsDir() {
return os.Chmod(path, 0777)
}
if isFile(fi) {
return os.Chmod(path, 0666)
}
return nil
}))
}
// RemoveAll recursively resets the read-only flag of all files and dirs and
// afterwards uses os.RemoveAll() to remove the path.
func RemoveAll(t testing.TB, path string) {
ResetReadOnly(t, path)
OK(t, os.RemoveAll(path))
}