mirror of
https://github.com/restic/restic.git
synced 2024-08-31 08:37:35 +02:00
284 lines
6.0 KiB
Go
284 lines
6.0 KiB
Go
package backend_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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"sort"
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"testing"
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crand "crypto/rand"
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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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func testBackendConfig(b backend.Backend, t *testing.T) {
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// create config and read it back
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_, err := b.Get(backend.Config, "")
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Assert(t, err != nil, "did not get expected error for non-existing config")
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blob, err := b.Create()
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OK(t, err)
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_, err = blob.Write([]byte("Config"))
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OK(t, err)
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OK(t, blob.Finalize(backend.Config, ""))
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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.Get(backend.Config, name)
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Assert(t, err == nil, "unable to read config")
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buf, err := ioutil.ReadAll(rd)
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OK(t, err)
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OK(t, rd.Close())
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Assert(t, string(buf) == "Config", "wrong data returned for config")
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}
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}
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func testGetReader(b backend.Backend, t testing.TB) {
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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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func testWrite(b backend.Backend, t testing.TB) {
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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.Get(backend.Data, name)
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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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}
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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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func testBackend(b backend.Backend, t *testing.T) {
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testBackendConfig(b, 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.Get(tpe, id.String())
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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 Get()
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rd, err := b.Get(tpe, test.id)
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OK(t, err)
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Assert(t, rd != nil, "Get() returned nil")
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read(t, rd, []byte(test.data))
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OK(t, rd.Close())
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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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sort.Sort(IDs)
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i := 0
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for s := range b.List(tpe, nil) {
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Equals(t, IDs[i].String(), s)
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i++
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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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testGetReader(b, t)
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testWrite(b, t)
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}
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