Airat Arifullin
c11741807b
* Introduce `patcher` package that contains such interfaces to be
implemented:
- `PatchApplier` - the main patching engine that merges the stream
of patches and the stream of original object payload divided by
ranges. The merged streams result is output to `ChunkedObjectWriter`;
- `RangeProvider` - provides the original object payload by ranges;
- `HeaderProvider` - provides the original object header.
* Introduce `patcher` that implements `PatchApplier`;
* Cover all possible cases with unit-tests.
Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>
471 lines
13 KiB
Go
471 lines
13 KiB
Go
package patcher
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import (
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"bytes"
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"context"
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"io"
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"testing"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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"github.com/stretchr/testify/require"
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)
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type mockPatchedObjectWriter struct {
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obj *objectSDK.Object
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}
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func (m *mockPatchedObjectWriter) Write(_ context.Context, chunk []byte) (int, error) {
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res := append(m.obj.Payload(), chunk...)
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m.obj.SetPayload(res)
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m.obj.SetPayloadSize(uint64(len(res)))
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return len(chunk), nil
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}
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func (m *mockPatchedObjectWriter) WriteHeader(_ context.Context, hdr *objectSDK.Object) error {
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m.obj.ToV2().SetHeader(hdr.ToV2().GetHeader())
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return nil
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}
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func (m *mockPatchedObjectWriter) Close(context.Context) (*transformer.AccessIdentifiers, error) {
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return &transformer.AccessIdentifiers{}, nil
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}
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type mockRangeProvider struct {
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originalObjectPayload []byte
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}
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var _ RangeProvider = (*mockRangeProvider)(nil)
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func (m *mockRangeProvider) ReadRange(_ context.Context, rng *objectSDK.Range) io.Reader {
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offset := rng.GetOffset()
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length := rng.GetLength()
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if length == 0 {
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return bytes.NewReader(m.originalObjectPayload[offset:])
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}
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return bytes.NewReader(m.originalObjectPayload[offset : offset+length])
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}
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func newTestObject() (*objectSDK.Object, oid.Address) {
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obj := objectSDK.New()
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addr := oidtest.Address()
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obj.SetContainerID(addr.Container())
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obj.SetID(addr.Object())
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return obj, addr
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}
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func rangeWithOffestWithLength(offset, length uint64) *objectSDK.Range {
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rng := new(objectSDK.Range)
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rng.SetOffset(offset)
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rng.SetLength(length)
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return rng
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}
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func TestPatchRevert(t *testing.T) {
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obj, _ := newTestObject()
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modifPatch := &objectSDK.Patch{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte("inserted"),
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},
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}
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originalObjectPayload := []byte("*******************")
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obj.SetPayload(originalObjectPayload)
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obj.SetPayloadSize(uint64(len(originalObjectPayload)))
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exp := []byte("inserted*******************")
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rangeProvider := &mockRangeProvider{
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originalObjectPayload: originalObjectPayload,
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}
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patchedObj, _ := newTestObject()
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wr := &mockPatchedObjectWriter{
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obj: patchedObj,
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}
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patcher := New(obj.CutPayload(), rangeProvider, wr)
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err := patcher.ApplyAttributesPatch(context.Background(), modifPatch.NewAttributes, modifPatch.ReplaceAttributes)
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require.NoError(t, err)
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err = patcher.ApplyPayloadPatch(context.Background(), modifPatch.PayloadPatch)
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require.NoError(t, err)
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_, err = patcher.Close(context.Background())
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require.NoError(t, err)
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require.Equal(t, exp, patchedObj.Payload())
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revertPatch := &objectSDK.Patch{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, uint64(len("inserted"))),
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Chunk: []byte{},
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},
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}
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rangeProvider = &mockRangeProvider{
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originalObjectPayload: exp,
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}
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patchedPatchedObj, _ := newTestObject()
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wr = &mockPatchedObjectWriter{
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obj: patchedPatchedObj,
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}
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patcher = New(patchedObj.CutPayload(), rangeProvider, wr)
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err = patcher.ApplyAttributesPatch(context.Background(), revertPatch.NewAttributes, revertPatch.ReplaceAttributes)
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require.NoError(t, err)
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err = patcher.ApplyPayloadPatch(context.Background(), revertPatch.PayloadPatch)
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require.NoError(t, err)
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_, err = patcher.Close(context.Background())
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require.NoError(t, err)
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require.Equal(t, originalObjectPayload, patchedPatchedObj.Payload())
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}
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func newTestAttribute(key, val string) objectSDK.Attribute {
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var attr objectSDK.Attribute
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attr.SetKey(key)
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attr.SetValue(val)
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return attr
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}
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func TestPatch(t *testing.T) {
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for _, test := range []struct {
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name string
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patches []objectSDK.Patch
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originalObjectPayload []byte
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patched []byte
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expectedPayloadPatchErr error
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}{
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{
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name: "invalid offset",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(100, 0),
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Chunk: []byte(""),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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expectedPayloadPatchErr: ErrOffsetExceedsSize,
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},
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{
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name: "invalid following patch offset",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(10, 0),
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Chunk: []byte(""),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(7, 0),
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Chunk: []byte(""),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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expectedPayloadPatchErr: ErrInvalidPatchOffsetOrder,
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},
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{
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name: "only header patch",
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patches: []objectSDK.Patch{
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{
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NewAttributes: []objectSDK.Attribute{
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newTestAttribute("key1", "val2"),
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newTestAttribute("key2", "val2"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "header and payload",
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patches: []objectSDK.Patch{
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{
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NewAttributes: []objectSDK.Attribute{
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newTestAttribute("key1", "val2"),
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newTestAttribute("key2", "val2"),
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},
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte("inserted at the beginning"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("inserted at the beginning0123456789qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "header only then payload",
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patches: []objectSDK.Patch{
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{
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NewAttributes: []objectSDK.Attribute{
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newTestAttribute("key1", "val2"),
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newTestAttribute("key2", "val2"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte("inserted at the beginning"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("inserted at the beginning0123456789qwertyuiopasdfghjklzxcvbnm"),
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expectedPayloadPatchErr: ErrPayloadPatchIsNil,
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},
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{
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name: "no effect",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte(""),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(12, 0),
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Chunk: []byte(""),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(20, 0),
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Chunk: []byte(""),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "insert prefix",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte("inserted at the beginning"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("inserted at the beginning0123456789qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "insert in the middle",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(5, 0),
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Chunk: []byte("inserted somewhere in the middle"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("01234inserted somewhere in the middle56789qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "insert at the end",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(36, 0),
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Chunk: []byte("inserted somewhere at the end"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("0123456789qwertyuiopasdfghjklzxcvbnminserted somewhere at the end"),
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},
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{
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name: "replace by range",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 12),
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Chunk: []byte("just replace"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("just replaceertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "replace and insert some bytes",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 11),
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Chunk: []byte("replace and append in the middle"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("replace and append in the middlewertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "replace and insert some bytes in the middle",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(5, 3),
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Chunk: []byte("@@@@@"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("01234@@@@@89qwertyuiopasdfghjklzxcvbnm"),
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},
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{
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name: "a few patches: prefix, suffix",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(0, 0),
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Chunk: []byte("this_will_be_prefix"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(36, 0),
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Chunk: []byte("this_will_be_suffix"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789qwertyuiopasdfghjklzxcvbnm"),
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patched: []byte("this_will_be_prefix0123456789qwertyuiopasdfghjklzxcvbnmthis_will_be_suffix"),
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},
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{
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name: "a few patches: replace and insert some bytes",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(10, 3),
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Chunk: []byte("aaaaa"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(16, 0),
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Chunk: []byte("bbbbb"),
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},
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},
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},
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originalObjectPayload: []byte("0123456789ABCDEF"),
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patched: []byte("0123456789aaaaaDEFbbbbb"),
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},
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{
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name: "a few patches: various modifiactions",
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patches: []objectSDK.Patch{
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(4, 8),
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Chunk: []byte("earliest"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(13, 0),
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Chunk: []byte("known "),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(35, 8),
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Chunk: []byte("a small town"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(62, 6),
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Chunk: []byte("tablet"),
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},
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},
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{
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PayloadPatch: &objectSDK.PayloadPatch{
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Range: rangeWithOffestWithLength(87, 0),
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Chunk: []byte("Shar-Kali-Sharri"),
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},
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},
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},
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originalObjectPayload: []byte("The ******** mention of Babylon as [insert] appears on a clay ****** from the reign of "),
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patched: []byte("The earliest known mention of Babylon as a small town appears on a clay tablet from the reign of Shar-Kali-Sharri"),
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},
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} {
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t.Run(test.name, func(t *testing.T) {
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rangeProvider := &mockRangeProvider{
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originalObjectPayload: test.originalObjectPayload,
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}
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originalObject, _ := newTestObject()
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originalObject.SetPayload(test.originalObjectPayload)
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originalObject.SetPayloadSize(uint64(len(test.originalObjectPayload)))
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patchedObject, _ := newTestObject()
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wr := &mockPatchedObjectWriter{
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obj: patchedObject,
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}
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patcher := New(originalObject.CutPayload(), rangeProvider, wr)
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for i, patch := range test.patches {
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if i == 0 {
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_ = patcher.ApplyAttributesPatch(context.Background(), patch.NewAttributes, patch.ReplaceAttributes)
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}
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err := patcher.ApplyPayloadPatch(context.Background(), patch.PayloadPatch)
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if err != nil {
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if test.expectedPayloadPatchErr != nil {
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require.ErrorIs(t, err, test.expectedPayloadPatchErr)
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return
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} else {
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require.NoError(t, err)
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}
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}
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}
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_, err := patcher.Close(context.Background())
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require.NoError(t, err)
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require.Equal(t, test.patched, patchedObject.Payload())
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// attrOfPatchedObject := patchedObject.Attributes()
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// sort.Slice(attrOfPatchedObject, func(i, j int) bool {
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// return strings.Compare(attrOfPatchedObject[i].Key(), attrOfPatchedObject[j].Key()) < 0
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// })
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// testAttrs := test.newAttrs.ToSDKAttributes()
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// sort.Slice(testAttrs, func(i, j int) bool {
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// return strings.Compare(testAttrs[i].Key(), testAttrs[j].Key()) < 0
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// })
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// require.Equal(t, testAttrs, attrOfPatchedObject)
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})
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}
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}
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