Golang go-datastore.NewMapDatastore函數代碼示例

func TestRoutingResolve(t *testing.T) {
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	serv := mockrouting.NewServer()
	id := testutil.RandIdentityOrFatal(t)
	d := serv.ClientWithDatastore(context.Background(), id, dstore)

	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).B58String())
	if err != nil {
		t.Fatal(err)
	}

	if res != h {
		t.Fatal("Got back incorrect value.")
	}
}

func TestDuplicateSemantics(t *testing.T) {
	ctx := context.Background()
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))

	dserv := mdag.NewDAGService(bserv)

	// TODO does pinner need to share datastore with blockservice?
	p := NewPinner(dstore, dserv, dserv)

	a, _ := randNode()
	_, err := dserv.Add(a)
	if err != nil {
		t.Fatal(err)
	}

	// pin is recursively
	err = p.Pin(ctx, a, true)
	if err != nil {
		t.Fatal(err)
	}

	// pinning directly should fail
	err = p.Pin(ctx, a, false)
	if err == nil {
		t.Fatal("expected direct pin to fail")
	}

	// pinning recursively again should succeed
	err = p.Pin(ctx, a, true)
	if err != nil {
		t.Fatal(err)
	}
}

func TestReturnsErrorWhenSizeNegative(t *testing.T) {
	bs := NewBlockstore(syncds.MutexWrap(ds.NewMapDatastore()))
	_, err := bloomCached(bs, context.TODO(), -1, 1)
	if err == nil {
		t.Fail()
	}
}

func TestPutManyAddsToBloom(t *testing.T) {
	bs := NewBlockstore(syncds.MutexWrap(ds.NewMapDatastore()))

	ctx, _ := context.WithTimeout(context.Background(), 1*time.Second)
	cachedbs, err := testBloomCached(bs, ctx)

	select {
	case <-cachedbs.rebuildChan:
	case <-ctx.Done():
		t.Fatalf("Timeout wating for rebuild: %d", cachedbs.bloom.ElementsAdded())
	}

	block1 := blocks.NewBlock([]byte("foo"))
	block2 := blocks.NewBlock([]byte("bar"))

	cachedbs.PutMany([]blocks.Block{block1})
	has, err := cachedbs.Has(block1.Cid())
	if err != nil {
		t.Fatal(err)
	}
	if has == false {
		t.Fatal("added block is reported missing")
	}

	has, err = cachedbs.Has(block2.Cid())
	if err != nil {
		t.Fatal(err)
	}
	if has == true {
		t.Fatal("not added block is reported to be in blockstore")
	}
}

func (cfg *BuildCfg) fillDefaults() error {
	if cfg.Repo != nil && cfg.NilRepo {
		return errors.New("cannot set a repo and specify nilrepo at the same time")
	}

	if cfg.Repo == nil {
		var d ds.Datastore
		d = ds.NewMapDatastore()
		if cfg.NilRepo {
			d = ds.NewNullDatastore()
		}
		r, err := defaultRepo(dsync.MutexWrap(d))
		if err != nil {
			return err
		}
		cfg.Repo = r
	}

	if cfg.Routing == nil {
		cfg.Routing = DHTOption
	}

	if cfg.Host == nil {
		cfg.Host = DefaultHostOption
	}

	return nil
}

// session creates a test bitswap session.
//
// NB: It's easy make mistakes by providing the same peer ID to two different
// sessions. To safeguard, use the SessionGenerator to generate sessions. It's
// just a much better idea.
func Session(ctx context.Context, net tn.Network, p testutil.Identity) Instance {
	bsdelay := delay.Fixed(0)
	const bloomSize = 512
	const writeCacheElems = 100

	adapter := net.Adapter(p)
	dstore := ds_sync.MutexWrap(datastore2.WithDelay(ds.NewMapDatastore(), bsdelay))

	bstore, err := blockstore.CachedBlockstore(blockstore.NewBlockstore(
		ds_sync.MutexWrap(dstore)), ctx, blockstore.DefaultCacheOpts())
	if err != nil {
		panic(err.Error()) // FIXME perhaps change signature and return error.
	}

	const alwaysSendToPeer = true

	bs := New(ctx, p.ID(), adapter, bstore, alwaysSendToPeer).(*Bitswap)

	return Instance{
		Peer:            p.ID(),
		Exchange:        bs,
		blockstore:      bstore,
		blockstoreDelay: bsdelay,
	}
}

func (pn *peernet) Adapter(p testutil.Identity) bsnet.BitSwapNetwork {
	client, err := pn.Mocknet.AddPeer(p.PrivateKey(), p.Address())
	if err != nil {
		panic(err.Error())
	}
	routing := pn.routingserver.ClientWithDatastore(context.TODO(), p, ds.NewMapDatastore())
	return bsnet.NewFromIpfsHost(client, routing)
}

func getMockDagServAndBstore(t testing.TB) (mdag.DAGService, blockstore.Blockstore) {
	dstore := ds.NewMapDatastore()
	tsds := sync.MutexWrap(dstore)
	bstore := blockstore.NewBlockstore(tsds)
	bserv := bs.New(bstore, offline.Exchange(bstore))
	dserv := mdag.NewDAGService(bserv)
	return dserv, bstore
}

func newEngine(ctx context.Context, idStr string) peerAndEngine {
	return peerAndEngine{
		Peer: peer.ID(idStr),
		//Strategy: New(true),
		Engine: NewEngine(ctx,
			blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))),
	}
}

func TestHasIsBloomCached(t *testing.T) {
	cd := &callbackDatastore{f: func() {}, ds: ds.NewMapDatastore()}
	bs := NewBlockstore(syncds.MutexWrap(cd))

	for i := 0; i < 1000; i++ {
		bs.Put(blocks.NewBlock([]byte(fmt.Sprintf("data: %d", i))))
	}
	ctx, _ := context.WithTimeout(context.Background(), 1*time.Second)
	cachedbs, err := testBloomCached(bs, ctx)
	if err != nil {
		t.Fatal(err)
	}

	select {
	case <-cachedbs.rebuildChan:
	case <-ctx.Done():
		t.Fatalf("Timeout wating for rebuild: %d", cachedbs.bloom.ElementsAdded())
	}

	cacheFails := 0
	cd.SetFunc(func() {
		cacheFails++
	})

	for i := 0; i < 1000; i++ {
		cachedbs.Has(blocks.NewBlock([]byte(fmt.Sprintf("data: %d", i+2000))).Cid())
	}

	if float64(cacheFails)/float64(1000) > float64(0.05) {
		t.Fatal("Bloom filter has cache miss rate of more than 5%")
	}

	cacheFails = 0
	block := blocks.NewBlock([]byte("newBlock"))

	cachedbs.PutMany([]blocks.Block{block})
	if cacheFails != 2 {
		t.Fatalf("expected two datastore hits: %d", cacheFails)
	}
	cachedbs.Put(block)
	if cacheFails != 3 {
		t.Fatalf("expected datastore hit: %d", cacheFails)
	}

	if has, err := cachedbs.Has(block.Cid()); !has || err != nil {
		t.Fatal("has gave wrong response")
	}

	bl, err := cachedbs.Get(block.Cid())
	if bl.String() != block.String() {
		t.Fatal("block data doesn't match")
	}

	if err != nil {
		t.Fatal("there should't be an error")
	}
}

func createStores(t *testing.T) (*arccache, *blockstore, *callbackDatastore) {
	cd := &callbackDatastore{f: func() {}, ds: ds.NewMapDatastore()}
	bs := NewBlockstore(syncds.MutexWrap(cd))
	arc, err := testArcCached(bs, nil)
	if err != nil {
		t.Fatal(err)
	}
	return arc, bs, cd
}

func TestWriteThroughWorks(t *testing.T) {
	bstore := &PutCountingBlockstore{
		blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())),
		0,
	}
	bstore2 := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))
	exch := offline.Exchange(bstore2)
	bserv := NewWriteThrough(bstore, exch)
	bgen := butil.NewBlockGenerator()

	block := bgen.Next()

	t.Logf("PutCounter: %d", bstore.PutCounter)
	bserv.AddBlock(block)
	if bstore.PutCounter != 1 {
		t.Fatalf("expected just one Put call, have: %d", bstore.PutCounter)
	}

	bserv.AddBlock(block)
	if bstore.PutCounter != 2 {
		t.Fatal("Put should have called again, should be 2 is: %d", bstore.PutCounter)
	}
}

func TestFlush(t *testing.T) {
	dstore := dssync.MutexWrap(ds.NewMapDatastore())
	bstore := blockstore.NewBlockstore(dstore)
	bserv := bs.New(bstore, offline.Exchange(bstore))

	dserv := mdag.NewDAGService(bserv)
	p := NewPinner(dstore, dserv, dserv)
	_, k := randNode()

	p.PinWithMode(k, Recursive)
	if err := p.Flush(); err != nil {
		t.Fatal(err)
	}
	assertPinned(t, p, k, "expected key to still be pinned")
}

func TestOutboxClosedWhenEngineClosed(t *testing.T) {
	t.SkipNow() // TODO implement *Engine.Close
	e := NewEngine(context.Background(), blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())))
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		for nextEnvelope := range e.Outbox() {
			<-nextEnvelope
		}
		wg.Done()
	}()
	// e.Close()
	wg.Wait()
	if _, ok := <-e.Outbox(); ok {
		t.Fatal("channel should be closed")
	}
}

func TestPartnerWantsThenCancels(t *testing.T) {
	numRounds := 10
	if testing.Short() {
		numRounds = 1
	}
	alphabet := strings.Split("abcdefghijklmnopqrstuvwxyz", "")
	vowels := strings.Split("aeiou", "")

	type testCase [][]string
	testcases := []testCase{
		{
			alphabet, vowels,
		},
		{
			alphabet, stringsComplement(alphabet, vowels),
		},
	}

	bs := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore()))
	for _, letter := range alphabet {
		block := blocks.NewBlock([]byte(letter))
		if err := bs.Put(block); err != nil {
			t.Fatal(err)
		}
	}

	for i := 0; i < numRounds; i++ {
		for _, testcase := range testcases {
			set := testcase[0]
			cancels := testcase[1]
			keeps := stringsComplement(set, cancels)

			e := NewEngine(context.Background(), bs)
			partner := testutil.RandPeerIDFatal(t)

			partnerWants(e, set, partner)
			partnerCancels(e, cancels, partner)
			if err := checkHandledInOrder(t, e, keeps); err != nil {
				t.Logf("run #%d of %d", i, numRounds)
				t.Fatal(err)
			}
		}
	}
}