func TestClientOverMax(t *testing.T) {
rs := NewServer()
k := key.Key("hello")
numProvidersForHelloKey := 100
for i := 0; i < numProvidersForHelloKey; i++ {
pi := testutil.RandIdentityOrFatal(t)
err := rs.Client(pi).Provide(context.Background(), k)
if err != nil {
t.Fatal(err)
}
}
max := 10
pi := testutil.RandIdentityOrFatal(t)
client := rs.Client(pi)
providersFromClient := client.FindProvidersAsync(context.Background(), k, max)
i := 0
for _ = range providersFromClient {
i++
}
if i != max {
t.Fatal("Too many providers returned")
}
}
func TestClientFindProviders(t *testing.T) {
pi := testutil.RandIdentityOrFatal(t)
rs := NewServer()
client := rs.Client(pi)
k := key.Key("hello")
err := client.Provide(context.Background(), k)
if err != nil {
t.Fatal(err)
}
// This is bad... but simulating networks is hard
time.Sleep(time.Millisecond * 300)
max := 100
providersFromClient := client.FindProvidersAsync(context.Background(), key.Key("hello"), max)
isInClient := false
for pi := range providersFromClient {
if pi.ID == pi.ID {
isInClient = true
}
}
if !isInClient {
t.Fatal("Despite client providing key, client didn't receive peer when finding providers")
}
}
func TestGetBlockFromPeerAfterPeerAnnounces(t *testing.T) {
net := tn.VirtualNetwork(mockrouting.NewServer(), delay.Fixed(kNetworkDelay))
block := blocks.NewBlock([]byte("block"))
g := NewTestSessionGenerator(net)
defer g.Close()
peers := g.Instances(2)
hasBlock := peers[0]
defer hasBlock.Exchange.Close()
if err := hasBlock.Exchange.HasBlock(context.Background(), block); err != nil {
t.Fatal(err)
}
wantsBlock := peers[1]
defer wantsBlock.Exchange.Close()
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
received, err := wantsBlock.Exchange.GetBlock(ctx, block.Key())
if err != nil {
t.Log(err)
t.Fatal("Expected to succeed")
}
if !bytes.Equal(block.Data, received.Data) {
t.Fatal("Data doesn't match")
}
}
// Bootstrap kicks off IpfsNode bootstrapping. This function will periodically
// check the number of open connections and -- if there are too few -- initiate
// connections to well-known bootstrap peers. It also kicks off subsystem
// bootstrapping (i.e. routing).
func Bootstrap(n *IpfsNode, cfg BootstrapConfig) (io.Closer, error) {
// make a signal to wait for one bootstrap round to complete.
doneWithRound := make(chan struct{})
// the periodic bootstrap function -- the connection supervisor
periodic := func(worker goprocess.Process) {
ctx := procctx.WithProcessClosing(context.Background(), worker)
defer log.EventBegin(ctx, "periodicBootstrap", n.Identity).Done()
if err := bootstrapRound(ctx, n.PeerHost, cfg); err != nil {
log.Event(ctx, "bootstrapError", n.Identity, lgbl.Error(err))
log.Debugf("%s bootstrap error: %s", n.Identity, err)
}
<-doneWithRound
}
// kick off the node's periodic bootstrapping
proc := periodicproc.Tick(cfg.Period, periodic)
proc.Go(periodic) // run one right now.
// kick off Routing.Bootstrap
if n.Routing != nil {
ctx := procctx.WithProcessClosing(context.Background(), proc)
if err := n.Routing.Bootstrap(ctx); err != nil {
proc.Close()
return nil, err
}
}
doneWithRound <- struct{}{}
close(doneWithRound) // it no longer blocks periodic
return proc, nil
}
func TestEnumerateChildren(t *testing.T) {
bsi := bstest.Mocks(1)
ds := NewDAGService(bsi[0])
read := io.LimitReader(u.NewTimeSeededRand(), 1024*1024)
root, err := imp.BuildDagFromReader(ds, chunk.NewSizeSplitter(read, 512))
if err != nil {
t.Fatal(err)
}
ks := key.NewKeySet()
err = EnumerateChildren(context.Background(), ds, root, ks)
if err != nil {
t.Fatal(err)
}
var traverse func(n *Node)
traverse = func(n *Node) {
// traverse dag and check
for _, lnk := range n.Links {
k := key.Key(lnk.Hash)
if !ks.Has(k) {
t.Fatal("missing key in set!")
}
child, err := ds.Get(context.Background(), k)
if err != nil {
t.Fatal(err)
}
traverse(child)
}
}
traverse(root)
}
func TestGetBlocks(t *testing.T) {
store := bstore()
ex := Exchange(store)
g := blocksutil.NewBlockGenerator()
expected := g.Blocks(2)
for _, b := range expected {
if err := ex.HasBlock(context.Background(), b); err != nil {
t.Fail()
}
}
request := func() []key.Key {
var ks []key.Key
for _, b := range expected {
ks = append(ks, b.Key())
}
return ks
}()
received, err := ex.GetBlocks(context.Background(), request)
if err != nil {
t.Fatal(err)
}
var count int
for _ = range received {
count++
}
if len(expected) != count {
t.Fail()
}
}
func TestAddLink(t *testing.T) {
ds := mdtest.Mock(t)
fishnode := &dag.Node{
Data: []byte("fishcakes!"),
}
fk, err := ds.Add(fishnode)
if err != nil {
t.Fatal(err)
}
nd := new(dag.Node)
nnode, err := addLink(context.Background(), ds, nd, "fish", fk)
if err != nil {
t.Fatal(err)
}
fnprime, err := nnode.GetLinkedNode(context.Background(), ds, "fish")
if err != nil {
t.Fatal(err)
}
fnpkey, err := fnprime.Key()
if err != nil {
t.Fatal(err)
}
if fnpkey != fk {
t.Fatal("wrong child node found!")
}
}
func TestBasicBitswap(t *testing.T) {
net := tn.VirtualNetwork(mockrouting.NewServer(), delay.Fixed(kNetworkDelay))
sg := NewTestSessionGenerator(net)
defer sg.Close()
bg := blocksutil.NewBlockGenerator()
t.Log("Test a one node trying to get one block from another")
instances := sg.Instances(2)
blocks := bg.Blocks(1)
err := instances[0].Exchange.HasBlock(context.Background(), blocks[0])
if err != nil {
t.Fatal(err)
}
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
defer cancel()
blk, err := instances[1].Exchange.GetBlock(ctx, blocks[0].Key())
if err != nil {
t.Fatal(err)
}
t.Log(blk)
for _, inst := range instances {
err := inst.Exchange.Close()
if err != nil {
t.Fatal(err)
}
}
}
func TestRoutingResolve(t *testing.T) {
d := mockrouting.NewServer().Client(testutil.RandIdentityOrFatal(t))
dstore := ds.NewMapDatastore()
resolver := NewRoutingResolver(d, 0)
publisher := NewRoutingPublisher(d, dstore)
privk, pubk, err := testutil.RandTestKeyPair(512)
if err != nil {
t.Fatal(err)
}
h := path.FromString("/ipfs/QmZULkCELmmk5XNfCgTnCyFgAVxBRBXyDHGGMVoLFLiXEN")
err = publisher.Publish(context.Background(), privk, h)
if err != nil {
t.Fatal(err)
}
pubkb, err := pubk.Bytes()
if err != nil {
t.Fatal(err)
}
pkhash := u.Hash(pubkb)
res, err := resolver.Resolve(context.Background(), key.Key(pkhash).Pretty())
if err != nil {
t.Fatal(err)
}
if res != h {
t.Fatal("Got back incorrect value.")
}
}
// TODO does dht ensure won't receive self as a provider? probably not.
func TestCanceledContext(t *testing.T) {
rs := NewServer()
k := key.Key("hello")
// avoid leaking goroutine, without using the context to signal
// (we want the goroutine to keep trying to publish on a
// cancelled context until we've tested it doesnt do anything.)
done := make(chan struct{})
defer func() { done <- struct{}{} }()
t.Log("async'ly announce infinite stream of providers for key")
i := 0
go func() { // infinite stream
for {
select {
case <-done:
t.Log("exiting async worker")
return
default:
}
pi, err := testutil.RandIdentity()
if err != nil {
t.Error(err)
}
err = rs.Client(pi).Provide(context.Background(), k)
if err != nil {
t.Error(err)
}
i++
}
}()
local := testutil.RandIdentityOrFatal(t)
client := rs.Client(local)
t.Log("warning: max is finite so this test is non-deterministic")
t.Log("context cancellation could simply take lower priority")
t.Log("and result in receiving the max number of results")
max := 1000
t.Log("cancel the context before consuming")
ctx, cancelFunc := context.WithCancel(context.Background())
cancelFunc()
providers := client.FindProvidersAsync(ctx, k, max)
numProvidersReturned := 0
for _ = range providers {
numProvidersReturned++
}
t.Log(numProvidersReturned)
if numProvidersReturned == max {
t.Fatal("Context cancel had no effect")
}
}
func ExampleEventLogger() {
{
log := EventLogger(nil)
e := log.EventBegin(context.Background(), "dial")
e.Done()
}
{
log := EventLogger(nil)
e := log.EventBegin(context.Background(), "dial")
_ = e.Close() // implements io.Closer for convenience
}
}
func TestMultiWrite(t *testing.T) {
dserv, pins := getMockDagServ(t)
_, n := getNode(t, dserv, 0, pins)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
dagmod, err := NewDagModifier(ctx, n, dserv, pins, sizeSplitterGen(512))
if err != nil {
t.Fatal(err)
}
data := make([]byte, 4000)
u.NewTimeSeededRand().Read(data)
for i := 0; i < len(data); i++ {
n, err := dagmod.WriteAt(data[i:i+1], int64(i))
if err != nil {
t.Fatal(err)
}
if n != 1 {
t.Fatal("Somehow wrote the wrong number of bytes! (n != 1)")
}
size, err := dagmod.Size()
if err != nil {
t.Fatal(err)
}
if size != int64(i+1) {
t.Fatal("Size was reported incorrectly")
}
}
nd, err := dagmod.GetNode()
if err != nil {
t.Fatal(err)
}
read, err := uio.NewDagReader(context.Background(), nd, dserv)
if err != nil {
t.Fatal(err)
}
rbuf, err := ioutil.ReadAll(read)
if err != nil {
t.Fatal(err)
}
err = arrComp(rbuf, data)
if err != nil {
t.Fatal(err)
}
}
// TODO simplify this test. get to the _essence_!
func TestSendToWantingPeer(t *testing.T) {
if testing.Short() {
t.SkipNow()
}
net := tn.VirtualNetwork(mockrouting.NewServer(), delay.Fixed(kNetworkDelay))
sg := NewTestSessionGenerator(net)
defer sg.Close()
bg := blocksutil.NewBlockGenerator()
prev := rebroadcastDelay.Set(time.Second / 2)
defer func() { rebroadcastDelay.Set(prev) }()
peers := sg.Instances(2)
peerA := peers[0]
peerB := peers[1]
t.Logf("Session %v\n", peerA.Peer)
t.Logf("Session %v\n", peerB.Peer)
timeout := time.Second
waitTime := time.Second * 5
alpha := bg.Next()
// peerA requests and waits for block alpha
ctx, cancel := context.WithTimeout(context.Background(), waitTime)
defer cancel()
alphaPromise, err := peerA.Exchange.GetBlocks(ctx, []key.Key{alpha.Key()})
if err != nil {
t.Fatal(err)
}
// peerB announces to the network that he has block alpha
ctx, cancel = context.WithTimeout(context.Background(), timeout)
defer cancel()
err = peerB.Exchange.HasBlock(ctx, alpha)
if err != nil {
t.Fatal(err)
}
// At some point, peerA should get alpha (or timeout)
blkrecvd, ok := <-alphaPromise
if !ok {
t.Fatal("context timed out and broke promise channel!")
}
if blkrecvd.Key() != alpha.Key() {
t.Fatal("Wrong block!")
}
}
func TestDeadlineFractionCancel(t *testing.T) {
ctx1, cancel1 := context.WithTimeout(context.Background(), 10*time.Millisecond)
ctx2, cancel2 := WithDeadlineFraction(ctx1, 0.5)
select {
case <-ctx1.Done():
t.Fatal("ctx1 ended too early")
case <-ctx2.Done():
t.Fatal("ctx2 ended too early")
default:
}
cancel2()
select {
case <-ctx1.Done():
t.Fatal("ctx1 should NOT be cancelled")
case <-ctx2.Done():
default:
t.Fatal("ctx2 should be cancelled")
}
cancel1()
select {
case <-ctx1.Done():
case <-ctx2.Done():
default:
t.Fatal("ctx1 should be cancelled")
}
}
func TestBuilderConsistency(t *testing.T) {
nbytes := 100000
buf := new(bytes.Buffer)
io.CopyN(buf, u.NewTimeSeededRand(), int64(nbytes))
should := dup(buf.Bytes())
dagserv := mdtest.Mock(t)
nd, err := buildTestDag(buf, dagserv, chunk.DefaultSplitter)
if err != nil {
t.Fatal(err)
}
r, err := uio.NewDagReader(context.Background(), nd, dagserv)
if err != nil {
t.Fatal(err)
}
out, err := ioutil.ReadAll(r)
if err != nil {
t.Fatal(err)
}
err = arrComp(out, should)
if err != nil {
t.Fatal(err)
}
}
func TestWritePostCancel(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
piper, pipew := io.Pipe()
w := NewWriter(ctx, pipew)
buf := []byte("abcdefghij")
buf2 := make([]byte, 10)
done := make(chan ioret)
go func() {
n, err := w.Write(buf)
done <- ioret{n, err}
}()
piper.Read(buf2)
select {
case ret := <-done:
if ret.n != 10 {
t.Error("ret.n should be 10", ret.n)
}
if ret.err != nil {
t.Error("ret.err should be nil", ret.err)
}
if string(buf2) != "abcdefghij" {
t.Error("write contents differ")
}
case <-time.After(20 * time.Millisecond):
t.Fatal("failed to write")
}
go func() {
n, err := w.Write(buf)
done <- ioret{n, err}
}()
cancel()
select {
case ret := <-done:
if ret.n != 0 {
t.Error("ret.n should be 0", ret.n)
}
if ret.err == nil {
t.Error("ret.err should be ctx error", ret.err)
}
case <-time.After(20 * time.Millisecond):
t.Fatal("failed to stop writing after cancel")
}
copy(buf, []byte("aaaaaaaaaa"))
piper.Read(buf2)
if string(buf2) == "aaaaaaaaaa" {
t.Error("buffer was read from after ctx cancel")
} else if string(buf2) != "abcdefghij" {
t.Error("write contents differ from expected")
}
}
func DirectAddCat(data []byte, conf testutil.LatencyConfig) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
const numPeers = 2
// create network
mn, err := mocknet.FullMeshLinked(ctx, numPeers)
if err != nil {
return err
}
mn.SetLinkDefaults(mocknet.LinkOptions{
Latency: conf.NetworkLatency,
// TODO add to conf. This is tricky because we want 0 values to be functional.
Bandwidth: math.MaxInt32,
})
peers := mn.Peers()
if len(peers) < numPeers {
return errors.New("test initialization error")
}
adder, err := core.NewIPFSNode(ctx, core.ConfigOption(MocknetTestRepo(peers[0], mn.Host(peers[0]), conf, core.DHTOption)))
if err != nil {
return err
}
defer adder.Close()
catter, err := core.NewIPFSNode(ctx, core.ConfigOption(MocknetTestRepo(peers[1], mn.Host(peers[1]), conf, core.DHTOption)))
if err != nil {
return err
}
defer catter.Close()
bs1 := []peer.PeerInfo{adder.Peerstore.PeerInfo(adder.Identity)}
bs2 := []peer.PeerInfo{catter.Peerstore.PeerInfo(catter.Identity)}
if err := catter.Bootstrap(core.BootstrapConfigWithPeers(bs1)); err != nil {
return err
}
if err := adder.Bootstrap(core.BootstrapConfigWithPeers(bs2)); err != nil {
return err
}
added, err := coreunix.Add(adder, bytes.NewReader(data))
if err != nil {
return err
}
readerCatted, err := coreunix.Cat(catter, added)
if err != nil {
return err
}
// verify
bufout := new(bytes.Buffer)
io.Copy(bufout, readerCatted)
if 0 != bytes.Compare(bufout.Bytes(), data) {
return errors.New("catted data does not match added data")
}
return nil
}
func addDefaultAssets(out io.Writer, repoRoot string) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
r, err := fsrepo.Open(repoRoot)
if err != nil { // NB: repo is owned by the node
return err
}
nd, err := core.NewNode(ctx, &core.BuildCfg{Repo: r})
if err != nil {
return err
}
defer nd.Close()
dkey, err := assets.SeedInitDocs(nd)
if err != nil {
return fmt.Errorf("init: seeding init docs failed: %s", err)
}
log.Debugf("init: seeded init docs %s", dkey)
if _, err = fmt.Fprintf(out, "to get started, enter:\n"); err != nil {
return err
}
_, err = fmt.Fprintf(out, "\n\tipfs cat /ipfs/%s/readme\n\n", dkey)
return err
}
func TestSeekingConsistency(t *testing.T) {
nbytes := int64(128 * 1024)
ds := mdtest.Mock()
nd, should := getTestDag(t, ds, nbytes, 500)
rs, err := uio.NewDagReader(context.Background(), nd, ds)
if err != nil {
t.Fatal(err)
}
out := make([]byte, nbytes)
for coff := nbytes - 4096; coff >= 0; coff -= 4096 {
t.Log(coff)
n, err := rs.Seek(coff, os.SEEK_SET)
if err != nil {
t.Fatal(err)
}
if n != coff {
t.Fatal("wasnt able to seek to the right position")
}
nread, err := rs.Read(out[coff : coff+4096])
if err != nil {
t.Fatal(err)
}
if nread != 4096 {
t.Fatal("didnt read the correct number of bytes")
}
}
err = arrComp(out, should)
if err != nil {
t.Fatal(err)
}
}
func TestSeekToAlmostBegin(t *testing.T) {
ds := mdtest.Mock()
nd, should := getTestDag(t, ds, 10*1024, 500)
rs, err := uio.NewDagReader(context.Background(), nd, ds)
if err != nil {
t.Fatal(err)
}
n, err := io.CopyN(ioutil.Discard, rs, 1024*4)
if err != nil {
t.Fatal(err)
}
if n != 4096 {
t.Fatal("Copy didnt copy enough bytes")
}
seeked, err := rs.Seek(1, os.SEEK_SET)
if err != nil {
t.Fatal(err)
}
if seeked != 1 {
t.Fatal("Failed to seek to almost beginning")
}
dagrArrComp(t, rs, should[1:])
}
func MockCmdsCtx() (commands.Context, error) {
// Generate Identity
ident, err := testutil.RandIdentity()
if err != nil {
return commands.Context{}, err
}
p := ident.ID()
conf := config.Config{
Identity: config.Identity{
PeerID: p.String(),
},
}
node, err := core.NewIPFSNode(context.Background(), core.Offline(&repo.Mock{
D: ds2.CloserWrap(syncds.MutexWrap(datastore.NewMapDatastore())),
C: conf,
}))
return commands.Context{
Online: true,
ConfigRoot: "/tmp/.mockipfsconfig",
LoadConfig: func(path string) (*config.Config, error) {
return &conf, nil
},
ConstructNode: func() (*core.IpfsNode, error) {
return node, nil
},
}, nil
}
// isPinned is the implementation of IsPinned that does not lock.
// intended for use by other pinned methods that already take locks
func (p *pinner) isPinned(k key.Key) (string, bool, error) {
if p.recursePin.HasKey(k) {
return "recursive", true, nil
}
if p.directPin.HasKey(k) {
return "direct", true, nil
}
if p.isInternalPin(k) {
return "internal", true, nil
}
for _, rk := range p.recursePin.GetKeys() {
rnd, err := p.dserv.Get(context.Background(), rk)
if err != nil {
return "", false, err
}
has, err := hasChild(p.dserv, rnd, k)
if err != nil {
return "", false, err
}
if has {
return rk.B58String(), true, nil
}
}
return "", false, nil
}
func TestDoesNotDeadLockIfContextCancelledBeforePublish(t *testing.T) {
g := blocksutil.NewBlockGenerator()
ctx, cancel := context.WithCancel(context.Background())
n := New()
defer n.Shutdown()
t.Log("generate a large number of blocks. exceed default buffer")
bs := g.Blocks(1000)
ks := func() []key.Key {
var keys []key.Key
for _, b := range bs {
keys = append(keys, b.Key())
}
return keys
}()
_ = n.Subscribe(ctx, ks...) // ignore received channel
t.Log("cancel context before any blocks published")
cancel()
for _, b := range bs {
n.Publish(b)
}
t.Log("publishing the large number of blocks to the ignored channel must not deadlock")
}
func TestIndirectBlocks(t *testing.T) {
splitter := &chunk.SizeSplitter{512}
nbytes := 1024 * 1024
buf := make([]byte, nbytes)
u.NewTimeSeededRand().Read(buf)
read := bytes.NewReader(buf)
ds := mdtest.Mock(t)
dag, err := buildTestDag(read, ds, splitter)
if err != nil {
t.Fatal(err)
}
reader, err := uio.NewDagReader(context.Background(), dag, ds)
if err != nil {
t.Fatal(err)
}
out, err := ioutil.ReadAll(reader)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(out, buf) {
t.Fatal("Not equal!")
}
}
func TestDialBadAddrs(t *testing.T) {
m := func(s string) ma.Multiaddr {
maddr, err := ma.NewMultiaddr(s)
if err != nil {
t.Fatal(err)
}
return maddr
}
ctx := context.Background()
s := makeSwarms(ctx, t, 1)[0]
test := func(a ma.Multiaddr) {
p := testutil.RandPeerIDFatal(t)
s.peers.AddAddr(p, a, peer.PermanentAddrTTL)
if _, err := s.Dial(ctx, p); err == nil {
t.Error("swarm should not dial: %s", m)
}
}
test(m("/ip6/fe80::1")) // link local
test(m("/ip6/fe80::100")) // link local
test(m("/ip4/127.0.0.1/udp/1234/utp")) // utp
}
func TestSeekEndSingleBlockFile(t *testing.T) {
nbytes := int64(100)
should := make([]byte, nbytes)
u.NewTimeSeededRand().Read(should)
read := bytes.NewReader(should)
ds := mdtest.Mock(t)
nd, err := buildTestDag(read, ds, &chunk.SizeSplitter{5000})
if err != nil {
t.Fatal(err)
}
rs, err := uio.NewDagReader(context.Background(), nd, ds)
if err != nil {
t.Fatal(err)
}
seeked, err := rs.Seek(0, os.SEEK_END)
if err != nil {
t.Fatal(err)
}
if seeked != nbytes {
t.Fatal("Failed to seek to end")
}
}
func TestReadPostCancel(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
piper, pipew := io.Pipe()
r := NewReader(ctx, piper)
buf := make([]byte, 10)
done := make(chan ioret)
go func() {
n, err := r.Read(buf)
done <- ioret{n, err}
}()
cancel()
select {
case ret := <-done:
if ret.n != 0 {
t.Error("ret.n should be 0", ret.n)
}
if ret.err == nil {
t.Error("ret.err should be ctx error", ret.err)
}
case <-time.After(20 * time.Millisecond):
t.Fatal("failed to stop reading after cancel")
}
pipew.Write([]byte("abcdefghij"))
if !bytes.Equal(buf, make([]byte, len(buf))) {
t.Fatal("buffer should have not been written to")
}
}
func testFileConsistency(t *testing.T, bs chunk.BlockSplitter, nbytes int) {
should := make([]byte, nbytes)
u.NewTimeSeededRand().Read(should)
read := bytes.NewReader(should)
ds := mdtest.Mock(t)
nd, err := buildTestDag(read, ds, bs)
if err != nil {
t.Fatal(err)
}
r, err := uio.NewDagReader(context.Background(), nd, ds)
if err != nil {
t.Fatal(err)
}
out, err := ioutil.ReadAll(r)
if err != nil {
t.Fatal(err)
}
err = arrComp(out, should)
if err != nil {
t.Fatal(err)
}
}
func TestWriter(t *testing.T) {
var buf bytes.Buffer
w := NewWriter(context.Background(), &buf)
// write three
n, err := w.Write([]byte("abc"))
if n != 3 {
t.Error("n should be 3")
}
if err != nil {
t.Error("should have no error")
}
if string(buf.Bytes()) != string("abc") {
t.Error("incorrect contents")
}
// write three more
n, err = w.Write([]byte("def"))
if n != 3 {
t.Error("n should be 3")
}
if err != nil {
t.Error("should have no error")
}
if string(buf.Bytes()) != string("abcdef") {
t.Error("incorrect contents")
}
}
func printDag(nd *merkledag.Node, ds merkledag.DAGService, indent int) {
pbd, err := ft.FromBytes(nd.Data)
if err != nil {
panic(err)
}
for i := 0; i < indent; i++ {
fmt.Print(" ")
}
fmt.Printf("{size = %d, type = %s, nc = %d", pbd.GetFilesize(), pbd.GetType().String(), len(pbd.GetBlocksizes()))
if len(nd.Links) > 0 {
fmt.Println()
}
for _, lnk := range nd.Links {
child, err := lnk.GetNode(context.Background(), ds)
if err != nil {
panic(err)
}
printDag(child, ds, indent+1)
}
if len(nd.Links) > 0 {
for i := 0; i < indent; i++ {
fmt.Print(" ")
}
}
fmt.Println("}")
}