mirror of https://github.com/octoleo/restic.git
526 lines
12 KiB
Go
526 lines
12 KiB
Go
package test
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import (
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"bytes"
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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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// TestCreate creates a backend.
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func TestCreate(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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// TestOpen opens a previously created backend.
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func TestOpen(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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// TestCreateWithConfig tests that creating a backend in a location which already
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// has a config file fails.
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func TestCreateWithConfig(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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// TestLocation tests that a location string is returned.
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func TestLocation(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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// TestConfig saves and loads a config from the backend.
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func TestConfig(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 := backend.LoadAll(b, backend.Handle{Type: backend.Config}, nil)
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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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err = b.Save(backend.Handle{Type: backend.Config}, []byte(testString))
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if err != nil {
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t.Fatalf("Save() 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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buf, err := backend.LoadAll(b, backend.Handle{Type: backend.Config}, nil)
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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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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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// TestLoad tests the backend's Load function.
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func TestLoad(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 := Random(23, length)
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id := backend.Hash(data)
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handle := backend.Handle{Type: backend.Data, Name: id.String()}
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err = b.Save(handle, data)
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if err != nil {
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t.Fatalf("Save() error: %v", err)
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}
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for i := 0; i < 50; 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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n, err := b.Load(handle, 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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// load with a too-large buffer, this should return io.ErrUnexpectedEOF
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buf := make([]byte, length+100)
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n, err := b.Load(handle, buf, 0)
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if n != length {
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t.Errorf("wrong length for larger buffer returned, want %d, got %d", length, n)
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}
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if err != io.ErrUnexpectedEOF {
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t.Errorf("wrong error returned for larger buffer: want io.ErrUnexpectedEOF, got %#v", err)
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}
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OK(t, b.Remove(backend.Data, id.String()))
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}
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// TestSave tests saving data in the backend.
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func TestSave(t testing.TB) {
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b := open(t)
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defer close(t)
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var id backend.ID
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for i := 0; i < 10; i++ {
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length := rand.Intn(1<<23) + 200000
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data := Random(23, length)
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// use the first 32 byte as the ID
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copy(id[:], data)
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h := backend.Handle{
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Type: backend.Data,
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Name: fmt.Sprintf("%s-%d", id, i),
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}
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err := b.Save(h, data)
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OK(t, err)
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buf, err := backend.LoadAll(b, h, nil)
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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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fi, err := b.Stat(h)
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OK(t, err)
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if fi.Size != int64(len(data)) {
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t.Fatalf("Stat() returned different size, want %q, got %d", len(data), fi.Size)
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}
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err = b.Remove(h.Type, h.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 filenameTests = []struct {
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name string
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data string
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}{
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{"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e", "x"},
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{"foobar", "foobar"},
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{
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"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e4bf8f2d9144cc5420a80f04a4880ad6155fc58903a4fb6457c476c43541dcaa6-5",
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"foobar content of data blob",
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},
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}
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// TestSaveFilenames tests saving data with various file names in the backend.
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func TestSaveFilenames(t testing.TB) {
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b := open(t)
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defer close(t)
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for i, test := range filenameTests {
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h := backend.Handle{Name: test.name, Type: backend.Data}
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err := b.Save(h, []byte(test.data))
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if err != nil {
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t.Errorf("test %d failed: Save() returned %v", i, err)
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continue
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}
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buf, err := backend.LoadAll(b, h, nil)
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if err != nil {
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t.Errorf("test %d failed: Load() returned %v", i, err)
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continue
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}
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if !bytes.Equal(buf, []byte(test.data)) {
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t.Errorf("test %d: returned wrong bytes", i)
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}
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err = b.Remove(h.Type, h.Name)
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if err != nil {
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t.Errorf("test %d failed: Remove() returned %v", i, err)
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continue
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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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err := b.Save(backend.Handle{Name: id.String(), Type: tpe}, data)
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OK(t, err)
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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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// TestBackend tests all functions of the backend.
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func TestBackend(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 stat a not existing blob
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h := backend.Handle{Type: tpe, Name: id.String()}
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_, err = b.Stat(h)
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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.Load(h, nil, 0)
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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 Load()
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h := backend.Handle{Type: tpe, Name: test.id}
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buf, err := backend.LoadAll(b, h, nil)
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OK(t, err)
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Equals(t, test.data, string(buf))
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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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buf2 := make([]byte, length)
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n, err := b.Load(h, buf2, int64(start))
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OK(t, err)
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Equals(t, length, n)
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Equals(t, test.data[start:end], string(buf2))
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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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err := b.Save(backend.Handle{Type: tpe, Name: test.id}, []byte(test.data))
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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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err = b.Save(backend.Handle{Type: tpe, Name: test.id}, []byte(test.data))
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OK(t, err)
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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 TestCleanupTempDirs {
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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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// TestDelete tests the Delete function.
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func TestDelete(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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// TestCleanup runs the cleanup function after all tests are run.
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func TestCleanup(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 !TestCleanupTempDirs {
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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()
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if err != nil {
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t.Fatalf("Cleanup returned error: %v", err)
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}
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}
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