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5cdcc99eba
Since backend.ID is always a slice of constant length, use an array
instead of a slice. Mostly, arrays behave as slices, except that an
array cannot be nil, so use `*backend.ID` insteaf of `backend.ID` in
places where the absence of an ID is possible (e.g. for the Subtree of a
Node, which may not present when the node is a file node).
This change allows to directly use backend.ID as the the key for a map,
so that arbitrary data structures (e.g. a Set implemented as a
map[backend.ID]struct{}) can easily be formed.
109 lines
2.1 KiB
Go
109 lines
2.1 KiB
Go
package pack_test
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import (
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"bytes"
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"crypto/rand"
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"crypto/sha256"
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"encoding/binary"
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"encoding/json"
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"io"
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"io/ioutil"
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"testing"
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"github.com/restic/restic/backend"
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"github.com/restic/restic/crypto"
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"github.com/restic/restic/pack"
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. "github.com/restic/restic/test"
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)
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var lengths = []int{23, 31650, 25860, 10928, 13769, 19862, 5211, 127, 13690, 30231}
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func TestCreatePack(t *testing.T) {
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type Buf struct {
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data []byte
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id backend.ID
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}
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bufs := []Buf{}
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for _, l := range lengths {
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b := make([]byte, l)
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_, err := io.ReadFull(rand.Reader, b)
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OK(t, err)
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h := sha256.Sum256(b)
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bufs = append(bufs, Buf{data: b, id: h})
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}
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file := bytes.NewBuffer(nil)
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// create random keys
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k := crypto.NewRandomKey()
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// pack blobs
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p := pack.NewPacker(k, file)
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for _, b := range bufs {
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p.Add(pack.Tree, b.id, bytes.NewReader(b.data))
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}
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// write file
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n, err := p.Finalize()
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OK(t, err)
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written := 0
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// data
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for _, l := range lengths {
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written += l
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}
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// header length
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written += binary.Size(uint32(0))
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// header
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written += len(lengths) * (binary.Size(pack.BlobType(0)) + binary.Size(uint32(0)) + backend.IDSize)
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// header crypto
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written += crypto.Extension
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// check length
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Equals(t, uint(written), n)
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Equals(t, uint(written), p.Size())
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// read and parse it again
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rd := bytes.NewReader(file.Bytes())
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np, err := pack.NewUnpacker(k, nil, rd)
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OK(t, err)
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Equals(t, len(np.Entries), len(bufs))
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for i, b := range bufs {
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e := np.Entries[i]
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Equals(t, b.id, e.ID)
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brd, err := e.GetReader(rd)
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OK(t, err)
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data, err := ioutil.ReadAll(brd)
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OK(t, err)
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Assert(t, bytes.Equal(b.data, data),
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"data for blob %v doesn't match", i)
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}
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}
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var blobTypeJson = []struct {
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t pack.BlobType
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res string
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}{
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{pack.Data, `"data"`},
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{pack.Tree, `"tree"`},
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}
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func TestBlobTypeJSON(t *testing.T) {
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for _, test := range blobTypeJson {
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// test serialize
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buf, err := json.Marshal(test.t)
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OK(t, err)
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Equals(t, test.res, string(buf))
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// test unserialize
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var v pack.BlobType
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err = json.Unmarshal([]byte(test.res), &v)
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OK(t, err)
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Equals(t, test.t, v)
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}
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}
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