mirror of
https://github.com/octoleo/restic.git
synced 2024-12-25 04:05:58 +00:00
577 lines
12 KiB
Go
577 lines
12 KiB
Go
package test
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import (
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"bytes"
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crand "crypto/rand"
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"fmt"
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"io"
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"io/ioutil"
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"math/rand"
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"reflect"
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"sort"
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"testing"
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"github.com/restic/restic/backend"
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. "github.com/restic/restic/test"
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)
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// CreateFn is a function that creates a temporary repository for the tests.
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var CreateFn func() (backend.Backend, error)
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// OpenFn is a function that opens a previously created temporary repository.
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var OpenFn func() (backend.Backend, error)
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// CleanupFn removes temporary files and directories created during the tests.
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var CleanupFn func() error
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var but backend.Backend // backendUnderTest
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var butInitialized bool
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func open(t testing.TB) backend.Backend {
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if OpenFn == nil {
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t.Fatal("OpenFn not set")
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}
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if CreateFn == nil {
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t.Fatalf("CreateFn not set")
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}
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if !butInitialized {
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be, err := CreateFn()
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if err != nil {
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t.Fatalf("Create returned unexpected error: %v", err)
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}
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but = be
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butInitialized = true
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}
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if but == nil {
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var err error
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but, err = OpenFn()
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if err != nil {
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t.Fatalf("Open returned unexpected error: %v", err)
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}
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}
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return but
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}
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func close(t testing.TB) {
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if but == nil {
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t.Fatalf("trying to close non-existing backend")
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}
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err := but.Close()
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if err != nil {
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t.Fatalf("Close returned unexpected error: %v", err)
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}
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but = nil
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}
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// Create creates a backend.
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func Create(t testing.TB) {
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if CreateFn == nil {
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t.Fatalf("CreateFn not set!")
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}
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be, err := CreateFn()
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if err != nil {
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fmt.Printf("foo\n")
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t.Fatalf("Create returned error: %v", err)
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}
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butInitialized = true
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err = be.Close()
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if err != nil {
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t.Fatalf("Close returned error: %v", err)
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}
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}
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// Open opens a previously created backend.
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func Open(t testing.TB) {
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if OpenFn == nil {
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t.Fatalf("OpenFn not set!")
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}
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be, err := OpenFn()
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if err != nil {
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t.Fatalf("Open returned error: %v", err)
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}
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err = be.Close()
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if err != nil {
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t.Fatalf("Close returned error: %v", err)
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}
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}
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// CreateWithConfig tests that creating a backend in a location which already
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// has a config file fails.
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func CreateWithConfig(t testing.TB) {
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if CreateFn == nil {
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t.Fatalf("CreateFn not set")
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}
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b := open(t)
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defer close(t)
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// save a config
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store(t, b, backend.Config, []byte("test config"))
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// now create the backend again, this must fail
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_, err := CreateFn()
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if err == nil {
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t.Fatalf("expected error not found for creating a backend with an existing config file")
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}
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// remove config
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err = b.Remove(backend.Config, "")
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if err != nil {
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t.Fatalf("unexpected error removing config: %v", err)
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}
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}
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// Location tests that a location string is returned.
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func Location(t testing.TB) {
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b := open(t)
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defer close(t)
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l := b.Location()
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if l == "" {
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t.Fatalf("invalid location string %q", l)
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}
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}
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// Config saves and loads a config from the backend.
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func Config(t testing.TB) {
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b := open(t)
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defer close(t)
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var testString = "Config"
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// create config and read it back
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_, err := b.GetReader(backend.Config, "", 0, 0)
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if err == nil {
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t.Fatalf("did not get expected error for non-existing config")
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}
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blob, err := b.Create()
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if err != nil {
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t.Fatalf("Create() error: %v", err)
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}
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_, err = blob.Write([]byte(testString))
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if err != nil {
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t.Fatalf("Write() error: %v", err)
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}
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err = blob.Finalize(backend.Config, "")
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if err != nil {
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t.Fatalf("Finalize() error: %v", err)
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}
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// try accessing the config with different names, should all return the
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// same config
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for _, name := range []string{"", "foo", "bar", "0000000000000000000000000000000000000000000000000000000000000000"} {
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rd, err := b.GetReader(backend.Config, name, 0, 0)
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if err != nil {
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t.Fatalf("unable to read config with name %q: %v", name, err)
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}
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buf, err := ioutil.ReadAll(rd)
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if err != nil {
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t.Fatalf("read config error: %v", err)
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}
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err = rd.Close()
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if err != nil {
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t.Fatalf("close error: %v", err)
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}
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if string(buf) != testString {
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t.Fatalf("wrong data returned, want %q, got %q", testString, string(buf))
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}
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}
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}
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// GetReader tests various ways the GetReader function can be called.
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func GetReader(t testing.TB) {
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b := open(t)
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defer close(t)
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length := rand.Intn(1<<24) + 2000
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data := make([]byte, length)
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_, err := io.ReadFull(crand.Reader, data)
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OK(t, err)
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blob, err := b.Create()
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OK(t, err)
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id := backend.Hash(data)
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_, err = blob.Write([]byte(data))
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OK(t, err)
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OK(t, blob.Finalize(backend.Data, id.String()))
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for i := 0; i < 500; i++ {
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l := rand.Intn(length + 2000)
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o := rand.Intn(length + 2000)
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d := data
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if o < len(d) {
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d = d[o:]
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} else {
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o = len(d)
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d = d[:0]
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}
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if l > 0 && l < len(d) {
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d = d[:l]
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}
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rd, err := b.GetReader(backend.Data, id.String(), uint(o), uint(l))
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OK(t, err)
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buf, err := ioutil.ReadAll(rd)
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OK(t, err)
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if !bytes.Equal(buf, d) {
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t.Fatalf("data not equal")
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}
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}
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OK(t, b.Remove(backend.Data, id.String()))
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}
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// Load tests the backend's Load function.
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func Load(t testing.TB) {
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b := open(t)
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defer close(t)
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_, err := b.Load(backend.Handle{}, nil, 0)
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if err == nil {
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t.Fatalf("Load() did not return an error for invalid handle")
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}
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_, err = b.Load(backend.Handle{Type: backend.Data, Name: "foobar"}, nil, 0)
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if err == nil {
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t.Fatalf("Load() did not return an error for non-existing blob")
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}
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length := rand.Intn(1<<24) + 2000
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data := make([]byte, length)
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_, err = io.ReadFull(crand.Reader, data)
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if err != nil {
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t.Fatalf("reading random data failed: %v", err)
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}
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id := backend.Hash(data)
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blob, err := b.Create()
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OK(t, err)
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_, err = blob.Write([]byte(data))
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OK(t, err)
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OK(t, blob.Finalize(backend.Data, id.String()))
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for i := 0; i < 500; i++ {
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l := rand.Intn(length + 2000)
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o := rand.Intn(length + 2000)
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d := data
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if o < len(d) {
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d = d[o:]
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} else {
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o = len(d)
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d = d[:0]
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}
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if l > 0 && l < len(d) {
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d = d[:l]
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}
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buf := make([]byte, l)
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h := backend.Handle{Type: backend.Data, Name: id.String()}
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n, err := b.Load(h, buf, int64(o))
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// if we requested data beyond the end of the file, ignore
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// ErrUnexpectedEOF error
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if l > len(d) && err == io.ErrUnexpectedEOF {
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err = nil
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buf = buf[:len(d)]
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}
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if err != nil {
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t.Errorf("Load(%d, %d): unexpected error: %v", len(buf), int64(o), err)
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continue
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}
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if n != len(buf) {
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t.Errorf("Load(%d, %d): wrong length returned, want %d, got %d",
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len(buf), int64(o), len(buf), n)
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continue
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}
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buf = buf[:n]
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if !bytes.Equal(buf, d) {
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t.Errorf("Load(%d, %d) returned wrong bytes", len(buf), int64(o))
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continue
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}
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}
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OK(t, b.Remove(backend.Data, id.String()))
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}
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// Write tests writing data to the backend.
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func Write(t testing.TB) {
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b := open(t)
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defer close(t)
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length := rand.Intn(1<<23) + 2000
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data := make([]byte, length)
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_, err := io.ReadFull(crand.Reader, data)
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OK(t, err)
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id := backend.Hash(data)
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for i := 0; i < 10; i++ {
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blob, err := b.Create()
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OK(t, err)
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o := 0
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for o < len(data) {
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l := rand.Intn(len(data) - o)
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if len(data)-o < 20 {
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l = len(data) - o
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}
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n, err := blob.Write(data[o : o+l])
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OK(t, err)
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if n != l {
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t.Fatalf("wrong number of bytes written, want %v, got %v", l, n)
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}
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o += l
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}
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name := fmt.Sprintf("%s-%d", id, i)
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OK(t, blob.Finalize(backend.Data, name))
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rd, err := b.GetReader(backend.Data, name, 0, 0)
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OK(t, err)
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buf, err := ioutil.ReadAll(rd)
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OK(t, err)
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if len(buf) != len(data) {
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t.Fatalf("number of bytes does not match, want %v, got %v", len(data), len(buf))
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}
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if !bytes.Equal(buf, data) {
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t.Fatalf("data not equal")
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}
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err = b.Remove(backend.Data, name)
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if err != nil {
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t.Fatalf("error removing item: %v", err)
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}
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}
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}
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var testStrings = []struct {
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id string
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data string
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}{
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{"c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2", "foobar"},
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{"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
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{"cc5d46bdb4991c6eae3eb739c9c8a7a46fe9654fab79c47b4fe48383b5b25e1c", "foo/bar"},
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{"4e54d2c721cbdb730f01b10b62dec622962b36966ec685880effa63d71c808f2", "foo/../../baz"},
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}
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func store(t testing.TB, b backend.Backend, tpe backend.Type, data []byte) {
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id := backend.Hash(data)
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blob, err := b.Create()
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OK(t, err)
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_, err = blob.Write([]byte(data))
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OK(t, err)
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OK(t, blob.Finalize(tpe, id.String()))
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}
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func read(t testing.TB, rd io.Reader, expectedData []byte) {
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buf, err := ioutil.ReadAll(rd)
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OK(t, err)
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if expectedData != nil {
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Equals(t, expectedData, buf)
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}
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}
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// Generic tests all functions of the backend.
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func Generic(t testing.TB) {
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b := open(t)
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defer close(t)
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for _, tpe := range []backend.Type{
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backend.Data, backend.Key, backend.Lock,
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backend.Snapshot, backend.Index,
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} {
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// detect non-existing files
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for _, test := range testStrings {
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id, err := backend.ParseID(test.id)
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OK(t, err)
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// test if blob is already in repository
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ret, err := b.Test(tpe, id.String())
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OK(t, err)
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Assert(t, !ret, "blob was found to exist before creating")
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// try to open not existing blob
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_, err = b.GetReader(tpe, id.String(), 0, 0)
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Assert(t, err != nil, "blob data could be extracted before creation")
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// try to read not existing blob
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_, err = b.GetReader(tpe, id.String(), 0, 1)
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Assert(t, err != nil, "blob reader could be obtained before creation")
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// try to get string out, should fail
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ret, err = b.Test(tpe, id.String())
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OK(t, err)
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Assert(t, !ret, "id %q was found (but should not have)", test.id)
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}
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// add files
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for _, test := range testStrings {
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store(t, b, tpe, []byte(test.data))
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// test GetReader()
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rd, err := b.GetReader(tpe, test.id, 0, uint(len(test.data)))
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OK(t, err)
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Assert(t, rd != nil, "GetReader() returned nil")
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read(t, rd, []byte(test.data))
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OK(t, rd.Close())
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// try to read it out with an offset and a length
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start := 1
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end := len(test.data) - 2
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length := end - start
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rd, err = b.GetReader(tpe, test.id, uint(start), uint(length))
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OK(t, err)
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Assert(t, rd != nil, "GetReader() returned nil")
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read(t, rd, []byte(test.data[start:end]))
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OK(t, rd.Close())
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}
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// test adding the first file again
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test := testStrings[0]
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// create blob
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blob, err := b.Create()
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OK(t, err)
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_, err = blob.Write([]byte(test.data))
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OK(t, err)
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err = blob.Finalize(tpe, test.id)
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Assert(t, err != nil, "expected error, got %v", err)
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// remove and recreate
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err = b.Remove(tpe, test.id)
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OK(t, err)
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// test that the blob is gone
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ok, err := b.Test(tpe, test.id)
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OK(t, err)
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Assert(t, ok == false, "removed blob still present")
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// create blob
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blob, err = b.Create()
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OK(t, err)
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_, err = io.Copy(blob, bytes.NewReader([]byte(test.data)))
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OK(t, err)
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OK(t, blob.Finalize(tpe, test.id))
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// list items
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IDs := backend.IDs{}
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for _, test := range testStrings {
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id, err := backend.ParseID(test.id)
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OK(t, err)
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IDs = append(IDs, id)
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}
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list := backend.IDs{}
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for s := range b.List(tpe, nil) {
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list = append(list, ParseID(s))
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}
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if len(IDs) != len(list) {
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t.Fatalf("wrong number of IDs returned: want %d, got %d", len(IDs), len(list))
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}
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sort.Sort(IDs)
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sort.Sort(list)
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if !reflect.DeepEqual(IDs, list) {
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t.Fatalf("lists aren't equal, want:\n %v\n got:\n%v\n", IDs, list)
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}
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// remove content if requested
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if TestCleanup {
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for _, test := range testStrings {
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id, err := backend.ParseID(test.id)
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OK(t, err)
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found, err := b.Test(tpe, id.String())
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OK(t, err)
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OK(t, b.Remove(tpe, id.String()))
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found, err = b.Test(tpe, id.String())
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OK(t, err)
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Assert(t, !found, fmt.Sprintf("id %q not found after removal", id))
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}
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}
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}
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}
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// Delete tests the Delete function.
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func Delete(t testing.TB) {
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b := open(t)
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defer close(t)
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be, ok := b.(backend.Deleter)
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if !ok {
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return
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}
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err := be.Delete()
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if err != nil {
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t.Fatalf("error deleting backend: %v", err)
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}
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}
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// Cleanup runs the cleanup function after all tests are run.
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func Cleanup(t testing.TB) {
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if CleanupFn == nil {
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t.Log("CleanupFn function not set")
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return
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}
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if !TestCleanup {
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t.Logf("not cleaning up backend")
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return
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}
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|
|
err := CleanupFn()
|
|
if err != nil {
|
|
t.Fatalf("Cleanup returned error: %v", err)
|
|
}
|
|
}
|