/
readonly_test.go
301 lines (263 loc) · 8.52 KB
/
readonly_test.go
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package blockstore
import (
"bytes"
"context"
"io"
"io/ioutil"
"os"
"testing"
"time"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
format "github.com/ipfs/go-ipld-format"
"github.com/ipfs/go-merkledag"
carv2 "github.com/ipld/go-car/v2"
"github.com/ipld/go-car/v2/internal/carv1"
"github.com/stretchr/testify/require"
)
func TestReadOnlyGetReturnsBlockstoreNotFoundWhenCidDoesNotExist(t *testing.T) {
subject, err := OpenReadOnly("../testdata/sample-v1.car")
require.NoError(t, err)
nonExistingKey := merkledag.NewRawNode([]byte("lobstermuncher")).Block.Cid()
// Assert blockstore API returns blockstore.ErrNotFound
gotBlock, err := subject.Get(context.TODO(), nonExistingKey)
require.IsType(t, format.ErrNotFound{}, err)
require.Nil(t, gotBlock)
}
func TestReadOnly(t *testing.T) {
tests := []struct {
name string
v1OrV2path string
opts []carv2.Option
}{
{
"OpenedWithCarV1",
"../testdata/sample-v1.car",
[]carv2.Option{UseWholeCIDs(true), carv2.StoreIdentityCIDs(true)},
},
{
"OpenedWithCarV2",
"../testdata/sample-wrapped-v2.car",
[]carv2.Option{UseWholeCIDs(true), carv2.StoreIdentityCIDs(true)},
},
{
"OpenedWithCarV1ZeroLenSection",
"../testdata/sample-v1-with-zero-len-section.car",
[]carv2.Option{UseWholeCIDs(true), carv2.ZeroLengthSectionAsEOF(true)},
},
{
"OpenedWithAnotherCarV1ZeroLenSection",
"../testdata/sample-v1-with-zero-len-section2.car",
[]carv2.Option{UseWholeCIDs(true), carv2.ZeroLengthSectionAsEOF(true)},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ctx := context.TODO()
subject, err := OpenReadOnly(tt.v1OrV2path, tt.opts...)
require.NoError(t, err)
t.Cleanup(func() { require.NoError(t, subject.Close()) })
f, err := os.Open(tt.v1OrV2path)
require.NoError(t, err)
t.Cleanup(func() { require.NoError(t, f.Close()) })
reader, err := carv2.NewBlockReader(f, tt.opts...)
require.NoError(t, err)
// Assert roots match v1 payload.
wantRoots := reader.Roots
gotRoots, err := subject.Roots()
require.NoError(t, err)
require.Equal(t, wantRoots, gotRoots)
var wantCids []cid.Cid
for {
wantBlock, err := reader.Next()
if err == io.EOF {
break
}
require.NoError(t, err)
key := wantBlock.Cid()
wantCids = append(wantCids, key)
// Assert blockstore contains key.
has, err := subject.Has(ctx, key)
require.NoError(t, err)
require.True(t, has)
// Assert size matches block raw data length.
gotSize, err := subject.GetSize(ctx, key)
wantSize := len(wantBlock.RawData())
require.NoError(t, err)
require.Equal(t, wantSize, gotSize)
// Assert block itself matches v1 payload block.
gotBlock, err := subject.Get(ctx, key)
require.NoError(t, err)
require.Equal(t, wantBlock, gotBlock)
// Assert write operations error
require.Error(t, subject.Put(ctx, wantBlock))
require.Error(t, subject.PutMany(ctx, []blocks.Block{wantBlock}))
require.Error(t, subject.DeleteBlock(ctx, key))
}
ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
defer cancel()
// Assert all cids in blockstore match v1 payload CIDs.
allKeysChan, err := subject.AllKeysChan(ctx)
require.NoError(t, err)
var gotCids []cid.Cid
for gotKey := range allKeysChan {
gotCids = append(gotCids, gotKey)
}
require.Equal(t, wantCids, gotCids)
})
}
}
func TestNewReadOnlyFailsOnUnknownVersion(t *testing.T) {
f, err := os.Open("../testdata/sample-rootless-v42.car")
require.NoError(t, err)
t.Cleanup(func() { f.Close() })
subject, err := NewReadOnly(f, nil)
require.Errorf(t, err, "unsupported car version: 42")
require.Nil(t, subject)
}
func TestReadOnlyAllKeysChanErrHandlerCalledOnTimeout(t *testing.T) {
expiredCtx, cancel := context.WithTimeout(context.Background(), -time.Millisecond)
t.Cleanup(cancel)
subject, err := OpenReadOnly("../testdata/sample-v1.car")
require.NoError(t, err)
t.Cleanup(func() { require.NoError(t, subject.Close()) })
// Make a channel to be able to select and block on until error handler is called.
errHandlerCalled := make(chan interface{})
expiredErrHandlingCtx := WithAsyncErrorHandler(expiredCtx, func(err error) {
defer close(errHandlerCalled)
require.EqualError(t, err, "context deadline exceeded")
})
_, err = subject.AllKeysChan(expiredErrHandlingCtx)
require.NoError(t, err)
// Assert error handler was called with required condition, waiting at most 3 seconds.
select {
case <-errHandlerCalled:
break
case <-time.After(time.Second * 3):
require.Fail(t, "error handler was not called within expected time window")
}
}
func TestReadOnlyAllKeysChanErrHandlerNeverCalled(t *testing.T) {
tests := []struct {
name string
path string
errHandler func(err error)
wantCIDs []cid.Cid
}{
{
"ReadingValidCarV1ReturnsNoErrors",
"../testdata/sample-v1.car",
func(err error) {
require.Fail(t, "unexpected call", "error handler called unexpectedly with err: %v", err)
},
listCids(t, newV1ReaderFromV1File(t, "../testdata/sample-v1.car", false)),
},
{
"ReadingValidCarV2ReturnsNoErrors",
"../testdata/sample-wrapped-v2.car",
func(err error) {
require.Fail(t, "unexpected call", "error handler called unexpectedly with err: %v", err)
},
listCids(t, newV1ReaderFromV2File(t, "../testdata/sample-wrapped-v2.car", false)),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
subject, err := OpenReadOnly(tt.path, UseWholeCIDs(true))
require.NoError(t, err)
ctx := WithAsyncErrorHandler(context.Background(), tt.errHandler)
keysChan, err := subject.AllKeysChan(ctx)
require.NoError(t, err)
var gotCids []cid.Cid
for k := range keysChan {
gotCids = append(gotCids, k)
}
require.Equal(t, tt.wantCIDs, gotCids)
})
}
}
func listCids(t *testing.T, v1r *carv1.CarReader) (cids []cid.Cid) {
for {
block, err := v1r.Next()
if err == io.EOF {
break
}
require.NoError(t, err)
cids = append(cids, block.Cid())
}
return
}
func newV1ReaderFromV1File(t *testing.T, carv1Path string, zeroLenSectionAsEOF bool) *carv1.CarReader {
f, err := os.Open(carv1Path)
require.NoError(t, err)
t.Cleanup(func() { f.Close() })
v1r, err := newV1Reader(f, zeroLenSectionAsEOF)
require.NoError(t, err)
return v1r
}
func newV1ReaderFromV2File(t *testing.T, carv2Path string, zeroLenSectionAsEOF bool) *carv1.CarReader {
f, err := os.Open(carv2Path)
require.NoError(t, err)
t.Cleanup(func() { f.Close() })
v2r, err := carv2.NewReader(f)
require.NoError(t, err)
v1r, err := newV1Reader(v2r.DataReader(), zeroLenSectionAsEOF)
require.NoError(t, err)
return v1r
}
func newV1Reader(r io.Reader, zeroLenSectionAsEOF bool) (*carv1.CarReader, error) {
if zeroLenSectionAsEOF {
return carv1.NewCarReaderWithZeroLengthSectionAsEOF(r)
}
return carv1.NewCarReader(r)
}
func TestReadOnlyErrorAfterClose(t *testing.T) {
bs, err := OpenReadOnly("../testdata/sample-v1.car")
ctx := context.TODO()
require.NoError(t, err)
roots, err := bs.Roots()
require.NoError(t, err)
_, err = bs.Has(ctx, roots[0])
require.NoError(t, err)
_, err = bs.Get(ctx, roots[0])
require.NoError(t, err)
_, err = bs.GetSize(ctx, roots[0])
require.NoError(t, err)
ctx, cancel := context.WithCancel(context.Background())
_, err = bs.AllKeysChan(ctx)
require.NoError(t, err)
cancel() // to stop the AllKeysChan goroutine
bs.Close()
_, err = bs.Roots()
require.Error(t, err)
_, err = bs.Has(ctx, roots[0])
require.Error(t, err)
_, err = bs.Get(ctx, roots[0])
require.Error(t, err)
_, err = bs.GetSize(ctx, roots[0])
require.Error(t, err)
_, err = bs.AllKeysChan(ctx)
require.Error(t, err)
// TODO: test that closing blocks if an AllKeysChan operation is
// in progress.
}
func TestNewReadOnly_CarV1WithoutIndexWorksAsExpected(t *testing.T) {
carV1Bytes, err := ioutil.ReadFile("../testdata/sample-v1.car")
require.NoError(t, err)
reader := bytes.NewReader(carV1Bytes)
v1r, err := carv1.NewCarReader(reader)
require.NoError(t, err)
require.Equal(t, uint64(1), v1r.Header.Version)
// Pick the first block in CARv1 as candidate to check `Get` works.
wantBlock, err := v1r.Next()
require.NoError(t, err)
// Seek back to the begining of the CARv1 payload.
_, err = reader.Seek(0, io.SeekStart)
require.NoError(t, err)
subject, err := NewReadOnly(reader, nil, UseWholeCIDs(true))
require.NoError(t, err)
// Require that the block is found via ReadOnly API and contetns are as expected.
gotBlock, err := subject.Get(context.TODO(), wantBlock.Cid())
require.NoError(t, err)
require.Equal(t, wantBlock, gotBlock)
}