Golang NewClock示例

说明

golang newclock示例是从最受好评的开源项目中提取的实现代码,你可以参考下面示例的使用方式。

编程语言: Golang

命名空间/包名称: github.com/cockroachdb/cockroach/util/hlc

示例#1
文件: client_test.go 项目: mbertschler/cockroach

// startFakeServerGossip creates local gossip instances and remote faked gossip instance.
// The remote gossip instance launches its faked gossip service just for
// check the client message.
func startFakeServerGossip(t *testing.T) (local *Gossip, remote *fakeGossipServer, stopper *stop.Stopper) {
	lclock := hlc.NewClock(hlc.UnixNano)
	stopper = stop.NewStopper()
	lRPCContext := rpc.NewContext(&base.Context{Insecure: true}, lclock, stopper)

	laddr := util.CreateTestAddr("tcp")
	lserver := rpc.NewServer(laddr, lRPCContext)
	if err := lserver.Start(); err != nil {
		t.Fatal(err)
	}
	local = New(lRPCContext, TestBootstrap)
	local.start(lserver, stopper)

	rclock := hlc.NewClock(hlc.UnixNano)
	raddr := util.CreateTestAddr("tcp")
	rRPCContext := rpc.NewContext(&base.Context{Insecure: true}, rclock, stopper)
	rserver := rpc.NewServer(raddr, rRPCContext)
	if err := rserver.Start(); err != nil {
		t.Fatal(err)
	}

	remote, err := newFakeGossipServer(rserver, stopper)
	if err != nil {
		t.Fatal(err)
	}
	addr := rserver.Addr()
	remote.nodeAddr = util.MakeUnresolvedAddr(addr.Network(), addr.String())
	time.Sleep(time.Millisecond)
	return
}

示例#2
文件: store_test.go 项目: GokulSrinivas/cockroach

// createTestStoreWithoutStart creates a test store using an in-memory
// engine without starting the store. It returns the store, the store
// clock's manual unix nanos time and a stopper. The caller is
// responsible for stopping the stopper upon completion.
func createTestStoreWithoutStart(t *testing.T) (*Store, *hlc.ManualClock, *stop.Stopper) {
	stopper := stop.NewStopper()
	// Setup fake zone config handler.
	config.TestingSetupZoneConfigHook(stopper)
	rpcContext := rpc.NewContext(&base.Context{}, hlc.NewClock(hlc.UnixNano), stopper)
	ctx := TestStoreContext
	ctx.Gossip = gossip.New(rpcContext, gossip.TestInterval, gossip.TestBootstrap)
	ctx.StorePool = NewStorePool(ctx.Gossip, TestTimeUntilStoreDeadOff, stopper)
	manual := hlc.NewManualClock(0)
	ctx.Clock = hlc.NewClock(manual.UnixNano)
	eng := engine.NewInMem(roachpb.Attributes{}, 10<<20, stopper)
	ctx.Transport = multiraft.NewLocalRPCTransport(stopper)
	stopper.AddCloser(ctx.Transport)
	sender := &testSender{}
	ctx.DB = client.NewDB(sender)
	store := NewStore(ctx, eng, &roachpb.NodeDescriptor{NodeID: 1})
	sender.store = store
	if err := store.Bootstrap(roachpb.StoreIdent{NodeID: 1, StoreID: 1}, stopper); err != nil {
		t.Fatal(err)
	}
	if err := store.BootstrapRange(nil); err != nil {
		t.Fatal(err)
	}
	return store, manual, stopper
}

示例#3
文件: store_test.go 项目: backend2use/cockroachdb

// createTestStoreWithoutStart creates a test store using an in-memory
// engine without starting the store. It returns the store, the store
// clock's manual unix nanos time and a stopper. The caller is
// responsible for stopping the stopper upon completion.
func createTestStoreWithoutStart(t *testing.T) (*Store, *hlc.ManualClock, *stop.Stopper) {
	stopper := stop.NewStopper()
	rpcContext := rpc.NewContext(rootTestBaseContext, hlc.NewClock(hlc.UnixNano), stopper)
	ctx := TestStoreContext
	ctx.Gossip = gossip.New(rpcContext, gossip.TestInterval, gossip.TestBootstrap)
	manual := hlc.NewManualClock(0)
	ctx.Clock = hlc.NewClock(manual.UnixNano)
	eng := engine.NewInMem(proto.Attributes{}, 10<<20)
	ctx.Transport = multiraft.NewLocalRPCTransport()
	stopper.AddCloser(ctx.Transport)
	sender := &testSender{}
	var err error
	if ctx.DB, err = client.Open("//[email protected]", client.SenderOpt(sender)); err != nil {
		t.Fatal(err)
	}
	store := NewStore(ctx, eng, &proto.NodeDescriptor{NodeID: 1})
	sender.store = store
	if err := store.Bootstrap(proto.StoreIdent{NodeID: 1, StoreID: 1}, stopper); err != nil {
		t.Fatal(err)
	}
	if err := store.BootstrapRange(); err != nil {
		t.Fatal(err)
	}
	return store, manual, stopper
}

示例#4
文件: context_test.go 项目: petermattis/cockroach

func TestOffsetMeasurement(t *testing.T) {
	defer leaktest.AfterTest(t)()

	stopper := stop.NewStopper()
	defer stopper.Stop()

	serverTime := time.Unix(0, 20)
	serverClock := hlc.NewClock(serverTime.UnixNano)
	serverCtx := newNodeTestContext(serverClock, stopper)
	s, ln := newTestServer(t, serverCtx, true)
	remoteAddr := ln.Addr().String()

	RegisterHeartbeatServer(s, &HeartbeatService{
		clock:              serverClock,
		remoteClockMonitor: serverCtx.RemoteClocks,
	})

	// Create a client clock that is behind the server clock.
	clientAdvancing := AdvancingClock{time: time.Unix(0, 10)}
	clientClock := hlc.NewClock(clientAdvancing.UnixNano)
	clientClock.SetMaxOffset(time.Millisecond)
	clientCtx := newNodeTestContext(clientClock, stopper)
	clientCtx.RemoteClocks.offsetTTL = 5 * clientAdvancing.advancementInterval
	if _, err := clientCtx.GRPCDial(remoteAddr); err != nil {
		t.Fatal(err)
	}

	expectedOffset := RemoteOffset{Offset: 10, Uncertainty: 0, MeasuredAt: 10}
	util.SucceedsSoon(t, func() error {
		clientCtx.RemoteClocks.mu.Lock()
		defer clientCtx.RemoteClocks.mu.Unlock()

		if o, ok := clientCtx.RemoteClocks.mu.offsets[remoteAddr]; !ok {
			return util.Errorf("expected offset of %s to be initialized, but it was not", remoteAddr)
		} else if o != expectedOffset {
			return util.Errorf("expected:\n%v\nactual:\n%v", expectedOffset, o)
		}
		return nil
	})

	// Change the client such that it receives a heartbeat right after the
	// maximum clock reading delay.
	clientAdvancing.Lock()
	clientAdvancing.advancementInterval = maximumPingDurationMult*clientClock.MaxOffset() + 1*time.Nanosecond
	clientAdvancing.Unlock()

	util.SucceedsSoon(t, func() error {
		clientCtx.RemoteClocks.mu.Lock()
		defer clientCtx.RemoteClocks.mu.Unlock()

		if o, ok := clientCtx.RemoteClocks.mu.offsets[remoteAddr]; ok {
			return util.Errorf("expected offset to have been cleared, but found %s", o)
		}
		return nil
	})
}

示例#5
文件: client_test.go 项目: gechong/cockroach

// startGossip creates local and remote gossip instances.
// Both remote and local instances launch the gossip service.
func startGossip(t *testing.T) (local, remote *Gossip, stopper *stop.Stopper) {
	stopper = stop.NewStopper()
	lclock := hlc.NewClock(hlc.UnixNano)
	lRPCContext := rpc.NewContext(&base.Context{Insecure: true}, lclock, stopper)

	laddr := util.CreateTestAddr("tcp")
	lserver := rpc.NewServer(lRPCContext)
	lTLSConfig, err := lRPCContext.GetServerTLSConfig()
	if err != nil {
		t.Fatal(err)
	}
	lln, err := util.ListenAndServe(stopper, lserver, laddr, lTLSConfig)
	if err != nil {
		t.Fatal(err)
	}
	local = New(lRPCContext, TestBootstrap)
	local.SetNodeID(1)
	if err := local.SetNodeDescriptor(&roachpb.NodeDescriptor{
		NodeID:  1,
		Address: util.MakeUnresolvedAddr(laddr.Network(), laddr.String()),
	}); err != nil {
		t.Fatal(err)
	}

	rclock := hlc.NewClock(hlc.UnixNano)
	rRPCContext := rpc.NewContext(&base.Context{Insecure: true}, rclock, stopper)

	raddr := util.CreateTestAddr("tcp")
	rserver := rpc.NewServer(rRPCContext)
	rTLSConfig, err := rRPCContext.GetServerTLSConfig()
	if err != nil {
		t.Fatal(err)
	}
	rln, err := util.ListenAndServe(stopper, rserver, raddr, rTLSConfig)
	if err != nil {
		t.Fatal(err)
	}
	remote = New(rRPCContext, TestBootstrap)
	remote.SetNodeID(2)
	if err := remote.SetNodeDescriptor(&roachpb.NodeDescriptor{
		NodeID:  2,
		Address: util.MakeUnresolvedAddr(raddr.Network(), raddr.String()),
	}); err != nil {
		t.Fatal(err)
	}
	local.start(lserver, lln.Addr(), stopper)
	remote.start(rserver, rln.Addr(), stopper)
	time.Sleep(time.Millisecond)
	return
}

示例#6
文件: client_test.go 项目: huaxling/cockroach

// TestDelayedOffsetMeasurement tests that the client will record a
// zero offset if the heartbeat reply exceeds the
// maximumClockReadingDelay, but not the heartbeat timeout.
func TestDelayedOffsetMeasurement(t *testing.T) {
	defer leaktest.AfterTest(t)

	stopper := util.NewStopper()
	defer stopper.Stop()

	serverManual := hlc.NewManualClock(10)
	serverClock := hlc.NewClock(serverManual.UnixNano)
	s := createTestServer(serverClock, stopper, t)

	heartbeat := &HeartbeatService{
		clock:              serverClock,
		remoteClockMonitor: newRemoteClockMonitor(serverClock),
	}
	if err := s.RegisterName("Heartbeat", heartbeat); err != nil {
		t.Fatalf("Unable to register heartbeat service: %s", err)
	}

	// Create a client that receives a heartbeat right after the
	// maximumClockReadingDelay.
	advancing := AdvancingClock{
		time:                0,
		advancementInterval: maximumClockReadingDelay.Nanoseconds() + 1,
	}
	clientClock := hlc.NewClock(advancing.UnixNano)
	context := NewServerTestContext(clientClock, stopper)
	c := NewClient(s.Addr(), nil, context)
	<-c.Ready

	// Ensure we get a good heartbeat before continuing.
	if err := util.IsTrueWithin(c.IsHealthy, heartbeatInterval*10); err != nil {
		t.Fatal(err)
	}

	// Since the reply took too long, we should have a zero offset, even
	// though the client is still healthy because it received a heartbeat
	// reply.
	if o := c.RemoteOffset(); !o.Equal(proto.RemoteOffset{}) {
		t.Errorf("expected offset %v, actual %v", proto.RemoteOffset{}, o)
	}

	// Ensure the general offsets map was updated properly too.
	context.RemoteClocks.mu.Lock()
	if o, ok := context.RemoteClocks.offsets[c.addr.String()]; ok {
		t.Errorf("expected offset to not exist, but found %v", o)
	}
	context.RemoteClocks.mu.Unlock()
}

示例#7
文件: txn_coord_sender_test.go 项目: freakynit/cockroach

// TestTxnCoordSenderSingleRoundtripTxn checks that a batch which completely
// holds the writing portion of a Txn (including EndTransaction) does not
// launch a heartbeat goroutine at all.
func TestTxnCoordSenderSingleRoundtripTxn(t *testing.T) {
	defer leaktest.AfterTest(t)
	stopper := stop.NewStopper()
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(20)

	ts := NewTxnCoordSender(senderFn(func(_ context.Context, ba proto.BatchRequest) (*proto.BatchResponse, *proto.Error) {
		return ba.CreateReply().(*proto.BatchResponse), nil
	}), clock, false, nil, stopper)

	// Stop the stopper manually, prior to trying the transaction. This has the
	// effect of returning a NodeUnavailableError for any attempts at launching
	// a heartbeat goroutine.
	stopper.Stop()

	var ba proto.BatchRequest
	put := &proto.PutRequest{}
	put.Key = proto.Key("test")
	ba.Add(put)
	ba.Add(&proto.EndTransactionRequest{})
	ba.Txn = &proto.Transaction{Name: "test"}
	_, pErr := ts.Send(context.Background(), ba)
	if pErr != nil {
		t.Fatal(pErr)
	}
}

示例#8
文件: timestamp_cache_test.go 项目: welfeng2016/cockroach

// TestTimestampCacheReadVsWrite verifies that the timestamp cache
// can differentiate between read and write timestamp.
func TestTimestampCacheReadVsWrite(t *testing.T) {
	defer leaktest.AfterTest(t)
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	tc := NewTimestampCache(clock)

	// Add read-only non-txn entry at current time.
	ts1 := clock.Now()
	tc.Add(roachpb.Key("a"), roachpb.Key("b"), ts1, nil, true)

	// Add two successive txn entries; one read-only and one read-write.
	txn1ID := uuid.NewUUID4()
	txn2ID := uuid.NewUUID4()
	ts2 := clock.Now()
	tc.Add(roachpb.Key("a"), nil, ts2, txn1ID, true)
	ts3 := clock.Now()
	tc.Add(roachpb.Key("a"), nil, ts3, txn2ID, false)

	// Fetching with no transaction gets latest values.
	if rTS, wTS := tc.GetMax(roachpb.Key("a"), nil, nil); !rTS.Equal(ts2) || !wTS.Equal(ts3) {
		t.Errorf("expected %s %s; got %s %s", ts2, ts3, rTS, wTS)
	}
	// Fetching with txn ID "1" gets original for read and most recent for write.
	if rTS, wTS := tc.GetMax(roachpb.Key("a"), nil, txn1ID); !rTS.Equal(ts1) || !wTS.Equal(ts3) {
		t.Errorf("expected %s %s; got %s %s", ts1, ts3, rTS, wTS)
	}
	// Fetching with txn ID "2" gets ts2 for read and low water mark for write.
	if rTS, wTS := tc.GetMax(roachpb.Key("a"), nil, txn2ID); !rTS.Equal(ts2) || !wTS.Equal(tc.lowWater) {
		t.Errorf("expected %s %s; got %s %s", ts2, tc.lowWater, rTS, wTS)
	}
}

示例#9
文件: timestamp_cache_test.go 项目: welfeng2016/cockroach

// TestTimestampCacheWithTxnID verifies that timestamps matching
// the specified txn ID are ignored.
func TestTimestampCacheWithTxnID(t *testing.T) {
	defer leaktest.AfterTest(t)
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	tc := NewTimestampCache(clock)

	// Add two successive txn entries.
	txn1ID := uuid.NewUUID4()
	txn2ID := uuid.NewUUID4()
	ts1 := clock.Now()
	tc.Add(roachpb.Key("a"), roachpb.Key("c"), ts1, txn1ID, true)
	ts2 := clock.Now()
	// This entry will remove "a"-"b" from the cache.
	tc.Add(roachpb.Key("b"), roachpb.Key("d"), ts2, txn2ID, true)

	// Fetching with no transaction gets latest value.
	if ts, _ := tc.GetMax(roachpb.Key("b"), nil, nil); !ts.Equal(ts2) {
		t.Errorf("expected %s; got %s", ts2, ts)
	}
	// Fetching with txn ID "1" gets most recent.
	if ts, _ := tc.GetMax(roachpb.Key("b"), nil, txn1ID); !ts.Equal(ts2) {
		t.Errorf("expected %s; got %s", ts2, ts)
	}
	// Fetching with txn ID "2" skips most recent.
	if ts, _ := tc.GetMax(roachpb.Key("b"), nil, txn2ID); !ts.Equal(ts1) {
		t.Errorf("expected %s; got %s", ts1, ts)
	}
}

示例#10
文件: local_test_cluster.go 项目: knorwood/cockroach

// Start starts the test cluster by bootstrapping an in-memory store
// (defaults to maximum of 50M). The server is started, launching the
// node RPC server and all HTTP endpoints. Use the value of
// TestServer.Addr after Start() for client connections. Use Stop()
// to shutdown the server after the test completes.
func (ltc *LocalTestCluster) Start(t util.Tester) {
	ltc.Manual = hlc.NewManualClock(0)
	ltc.Clock = hlc.NewClock(ltc.Manual.UnixNano)
	ltc.Stopper = stop.NewStopper()
	rpcContext := rpc.NewContext(testutils.NewRootTestBaseContext(), ltc.Clock, ltc.Stopper)
	ltc.Gossip = gossip.New(rpcContext, gossip.TestInterval, gossip.TestBootstrap)
	ltc.Eng = engine.NewInMem(proto.Attributes{}, 50<<20)
	ltc.lSender = newRetryableLocalSender(NewLocalSender())
	ltc.Sender = NewTxnCoordSender(ltc.lSender, ltc.Clock, false, nil, ltc.Stopper)
	var err error
	if ltc.DB, err = client.Open("//[email protected]", client.SenderOpt(ltc.Sender)); err != nil {
		t.Fatal(err)
	}
	transport := multiraft.NewLocalRPCTransport(ltc.Stopper)
	ltc.Stopper.AddCloser(transport)
	ctx := storage.TestStoreContext
	ctx.Clock = ltc.Clock
	ctx.DB = ltc.DB
	ctx.Gossip = ltc.Gossip
	ctx.Transport = transport
	ltc.Store = storage.NewStore(ctx, ltc.Eng, &proto.NodeDescriptor{NodeID: 1})
	if err := ltc.Store.Bootstrap(proto.StoreIdent{NodeID: 1, StoreID: 1}, ltc.Stopper); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
	ltc.lSender.AddStore(ltc.Store)
	if err := ltc.Store.BootstrapRange(nil); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
	if err := ltc.Store.Start(ltc.Stopper); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
}

示例#11
文件: stores_test.go 项目: GitGoldie/cockroach

func TestStoresVisitStores(t *testing.T) {
	defer leaktest.AfterTest(t)()
	ls := NewStores(hlc.NewClock(hlc.UnixNano))
	numStores := 10
	for i := 0; i < numStores; i++ {
		ls.AddStore(&Store{Ident: roachpb.StoreIdent{StoreID: roachpb.StoreID(i)}})
	}

	visit := make([]bool, numStores)
	err := ls.VisitStores(func(s *Store) error { visit[s.Ident.StoreID] = true; return nil })
	if err != nil {
		t.Errorf("unexpected error on visit: %s", err.Error())
	}

	for i, visited := range visit {
		if !visited {
			t.Errorf("store %d was not visited", i)
		}
	}

	err = ls.VisitStores(func(s *Store) error { return errors.New("") })
	if err == nil {
		t.Errorf("expected visit error")
	}
}

示例#12
文件: heartbeat_test.go 项目: mbertschler/cockroach

func TestHeartbeatReply(t *testing.T) {
	defer leaktest.AfterTest(t)
	manual := hlc.NewManualClock(5)
	clock := hlc.NewClock(manual.UnixNano)
	heartbeat := &HeartbeatService{
		clock:              clock,
		remoteClockMonitor: newRemoteClockMonitor(clock),
	}

	request := &PingRequest{
		Ping: "testPing",
	}
	var response *PingResponse
	if responseI, err := heartbeat.Ping(request); err != nil {
		t.Fatal(err)
	} else {
		response = responseI.(*PingResponse)
	}

	if response.Pong != request.Ping {
		t.Errorf("expected %s to be equal to %s", response.Pong, request.Ping)
	}

	if response.ServerTime != 5 {
		t.Errorf("expected server time 5, instead %d", response.ServerTime)
	}
}

示例#13
文件: txn_coord_sender_test.go 项目: kimh/cockroach

// TestTxnCoordSenderSingleRoundtripTxn checks that a batch which completely
// holds the writing portion of a Txn (including EndTransaction) does not
// launch a heartbeat goroutine at all.
func TestTxnCoordSenderSingleRoundtripTxn(t *testing.T) {
	defer leaktest.AfterTest(t)
	stopper := stop.NewStopper()
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(20)

	ts := NewTxnCoordSender(senderFn(func(_ context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
		br := ba.CreateReply()
		br.Txn = ba.Txn.Clone()
		br.Txn.Writing = true
		return br, nil
	}), clock, false, nil, stopper)

	// Stop the stopper manually, prior to trying the transaction. This has the
	// effect of returning a NodeUnavailableError for any attempts at launching
	// a heartbeat goroutine.
	stopper.Stop()

	var ba roachpb.BatchRequest
	key := roachpb.Key("test")
	ba.Add(&roachpb.BeginTransactionRequest{Span: roachpb.Span{Key: key}})
	ba.Add(&roachpb.PutRequest{Span: roachpb.Span{Key: key}})
	ba.Add(&roachpb.EndTransactionRequest{})
	ba.Txn = &roachpb.Transaction{Name: "test"}
	_, pErr := ts.Send(context.Background(), ba)
	if pErr != nil {
		t.Fatal(pErr)
	}
}

示例#14
文件: dist_sender_server_test.go 项目: rohanahata/cockroach

// TestMultiRangeScanReverseScanInconsistent verifies that a Scan/ReverseScan
// across ranges that doesn't require read consistency will set a timestamp
// using the clock local to the distributed sender.
func TestMultiRangeScanReverseScanInconsistent(t *testing.T) {
	defer leaktest.AfterTest(t)
	s, db := setupMultipleRanges(t, "b")
	defer s.Stop()

	// Write keys "a" and "b", the latter of which is the first key in the
	// second range.
	keys := []string{"a", "b"}
	ts := []time.Time{}
	for i, key := range keys {
		b := &client.Batch{}
		b.Put(key, "value")
		if err := db.Run(b); err != nil {
			t.Fatal(err)
		}
		ts = append(ts, b.Results[0].Rows[0].Timestamp())
		log.Infof("%d: %s", i, b.Results[0].Rows[0].Timestamp())
	}

	// Do an inconsistent Scan/ReverseScan from a new DistSender and verify
	// it does the read at its local clock and doesn't receive an
	// OpRequiresTxnError. We set the local clock to the timestamp of
	// the first key to verify it's used to read only key "a".
	manual := hlc.NewManualClock(ts[1].UnixNano() - 1)
	clock := hlc.NewClock(manual.UnixNano)
	ds := kv.NewDistSender(&kv.DistSenderContext{Clock: clock}, s.Gossip())

	// Scan.
	sa := roachpb.NewScan(roachpb.Key("a"), roachpb.Key("c"), 0).(*roachpb.ScanRequest)
	reply, err := client.SendWrappedWith(ds, nil, roachpb.BatchRequest_Header{
		ReadConsistency: roachpb.INCONSISTENT,
	}, sa)
	if err != nil {
		t.Fatal(err)
	}
	sr := reply.(*roachpb.ScanResponse)

	if l := len(sr.Rows); l != 1 {
		t.Fatalf("expected 1 row; got %d", l)
	}
	if key := string(sr.Rows[0].Key); keys[0] != key {
		t.Errorf("expected key %q; got %q", keys[0], key)
	}

	// ReverseScan.
	rsa := roachpb.NewReverseScan(roachpb.Key("a"), roachpb.Key("c"), 0).(*roachpb.ReverseScanRequest)
	reply, err = client.SendWrappedWith(ds, nil, roachpb.BatchRequest_Header{
		ReadConsistency: roachpb.INCONSISTENT,
	}, rsa)
	if err != nil {
		t.Fatal(err)
	}
	rsr := reply.(*roachpb.ReverseScanResponse)
	if l := len(rsr.Rows); l != 1 {
		t.Fatalf("expected 1 row; got %d", l)
	}
	if key := string(rsr.Rows[0].Key); keys[0] != key {
		t.Errorf("expected key %q; got %q", keys[0], key)
	}
}

示例#15
文件: queue_test.go 项目: liugangnhm/cockroach

func gossipForTest(t *testing.T) (*gossip.Gossip, *stop.Stopper) {
	stopper := stop.NewStopper()

	// Setup fake zone config handler.
	config.TestingSetupZoneConfigHook(stopper)

	rpcContext := rpc.NewContext(&base.Context{}, hlc.NewClock(hlc.UnixNano), stopper)
	g := gossip.New(rpcContext, gossip.TestBootstrap, stopper)
	// Have to call g.SetNodeID before call g.AddInfo
	g.SetNodeID(roachpb.NodeID(1))
	// Put an empty system config into gossip.
	if err := g.AddInfoProto(gossip.KeySystemConfig,
		&config.SystemConfig{}, 0); err != nil {
		t.Fatal(err)
	}

	// Wait for SystemConfig.
	util.SucceedsSoon(t, func() error {
		if g.GetSystemConfig() == nil {
			return util.Errorf("expected non-nil system config")
		}
		return nil
	})

	return g, stopper
}

示例#16
文件: timestamp_cache_test.go 项目: kaustubhkurve/cockroach

func TestTimestampCacheMergeInto(t *testing.T) {
	defer leaktest.AfterTest(t)
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)

	testCases := []struct {
		useClear bool
		expLen   int
	}{
		{true, 3},
		{false, 5},
	}
	for _, test := range testCases {
		tc1 := NewTimestampCache(clock)
		tc2 := NewTimestampCache(clock)

		bfTS := clock.Now()
		tc2.Add(roachpb.Key("b"), roachpb.Key("f"), bfTS, nil, true)

		adTS := clock.Now()
		tc1.Add(roachpb.Key("a"), roachpb.Key("d"), adTS, nil, true)

		beTS := clock.Now()
		tc1.Add(roachpb.Key("b"), roachpb.Key("e"), beTS, nil, true)

		aaTS := clock.Now()
		tc2.Add(roachpb.Key("aa"), nil, aaTS, nil, true)

		cTS := clock.Now()
		tc1.Add(roachpb.Key("c"), nil, cTS, nil, true)

		tc1.MergeInto(tc2, test.useClear)

		if tc2.cache.Len() != test.expLen {
			t.Errorf("expected merged length of %d; got %d", test.expLen, tc2.cache.Len())
		}
		if !tc2.latest.Equal(tc1.latest) {
			t.Errorf("expected latest to be updated to %s; got %s", tc1.latest, tc2.latest)
		}

		if rTS, _ := tc2.GetMax(roachpb.Key("a"), nil, nil); !rTS.Equal(adTS) {
			t.Error("expected \"a\" to have adTS timestamp")
		}
		if rTS, _ := tc2.GetMax(roachpb.Key("b"), nil, nil); !rTS.Equal(beTS) {
			t.Error("expected \"b\" to have beTS timestamp")
		}
		if test.useClear {
			if rTS, _ := tc2.GetMax(roachpb.Key("aa"), nil, nil); !rTS.Equal(adTS) {
				t.Error("expected \"aa\" to have adTS timestamp")
			}
		} else {
			if rTS, _ := tc2.GetMax(roachpb.Key("aa"), nil, nil); !rTS.Equal(aaTS) {
				t.Error("expected \"aa\" to have aaTS timestamp")
			}
			if rTS, _ := tc2.GetMax(roachpb.Key("a"), roachpb.Key("c"), nil); !rTS.Equal(aaTS) {
				t.Error("expected \"a\"-\"c\" to have aaTS timestamp")
			}
		}
	}
}

示例#17
文件: client_test.go 项目: mbertschler/cockroach

// TestClientHeartbeatBadServer verifies that the client is not marked
// as "ready" until a heartbeat request succeeds.
func TestClientHeartbeatBadServer(t *testing.T) {
	defer leaktest.AfterTest(t)

	stopper := stop.NewStopper()
	defer stopper.Stop()

	// Create a server without registering a heartbeat service.
	serverClock := hlc.NewClock(hlc.UnixNano)
	s := createTestServer(serverClock, stopper, t)

	// Create a client. It should attempt a heartbeat and fail.
	c := NewClient(s.Addr(), s.context)

	// Register a heartbeat service.
	heartbeat := &HeartbeatService{
		clock:              serverClock,
		remoteClockMonitor: newRemoteClockMonitor(serverClock),
	}

	select {
	case <-c.Healthy():
		t.Error("client became healthy before a successful heartbeat")
	case <-time.After(10 * time.Millisecond):
	}

	if err := heartbeat.Register(s); err != nil {
		t.Fatalf("Unable to register heartbeat service: %s", err)
	}

	// A heartbeat should succeed and the client should become ready.
	<-c.Healthy()
}

示例#18
文件: scanner_test.go 项目: Hellblazer/cockroach

// TestScannerStats verifies that stats accumulate from all ranges.
func TestScannerStats(t *testing.T) {
	defer leaktest.AfterTest(t)
	const count = 3
	ranges := newTestRangeSet(count, t)
	q := &testQueue{}
	stopper := util.NewStopper()
	defer stopper.Stop()
	s := newRangeScanner(1*time.Millisecond, 0, ranges, nil)
	s.AddQueues(q)
	mc := hlc.NewManualClock(0)
	clock := hlc.NewClock(mc.UnixNano)
	// At start, scanner stats should be blank for MVCC, but have accurate number of ranges.
	if rc := s.Stats().RangeCount; rc != count {
		t.Errorf("range count expected %d; got %d", count, rc)
	}
	if vb := s.Stats().MVCC.ValBytes; vb != 0 {
		t.Errorf("value bytes expected %d; got %d", 0, vb)
	}
	s.Start(clock, stopper)
	// We expect a full run to accumulate stats from all ranges.
	if err := util.IsTrueWithin(func() bool {
		if rc := s.Stats().RangeCount; rc != count {
			return false
		}
		if vb := s.Stats().MVCC.ValBytes; vb != count*2 {
			return false
		}
		return true
	}, 100*time.Millisecond); err != nil {
		t.Error(err)
	}
}

示例#19
文件: client_test.go 项目: mbertschler/cockroach

// TestClientGossip verifies a client can gossip a delta to the server.
func TestClientGossip(t *testing.T) {
	defer leaktest.AfterTest(t)
	local, remote, stopper := startGossip(t)
	disconnected := make(chan *client, 1)
	client := newClient(remote.is.NodeAddr)

	defer func() {
		stopper.Stop()
		if client != <-disconnected {
			t.Errorf("expected client disconnect after remote close")
		}
	}()

	if err := local.AddInfo("local-key", nil, time.Second); err != nil {
		t.Fatal(err)
	}
	if err := remote.AddInfo("remote-key", nil, time.Second); err != nil {
		t.Fatal(err)
	}

	// Use an insecure context. We're talking to tcp socket which are not in the certs.
	lclock := hlc.NewClock(hlc.UnixNano)
	rpcContext := rpc.NewContext(&base.Context{Insecure: true}, lclock, stopper)
	client.start(local, disconnected, rpcContext, stopper)

	util.SucceedsWithin(t, 500*time.Millisecond, func() error {
		if _, err := remote.GetInfo("local-key"); err != nil {
			return err
		}
		if _, err := local.GetInfo("remote-key"); err != nil {
			return err
		}
		return nil
	})
}

示例#20
文件: cluster.go 项目: harryyeh/cockroach

// createCluster generates a new cluster using the provided stopper and the
// number of nodes supplied. Each node will have one store to start.
func createCluster(stopper *stop.Stopper, nodeCount int) *Cluster {
	rand, seed := randutil.NewPseudoRand()
	clock := hlc.NewClock(hlc.UnixNano)
	rpcContext := rpc.NewContext(&base.Context{}, clock, stopper)
	g := gossip.New(rpcContext, gossip.TestInterval, gossip.TestBootstrap)
	storePool := storage.NewStorePool(g, storage.TestTimeUntilStoreDeadOff, stopper)
	c := &Cluster{
		stopper:       stopper,
		clock:         clock,
		rpc:           rpcContext,
		gossip:        g,
		storePool:     storePool,
		allocator:     storage.MakeAllocator(storePool, storage.RebalancingOptions{}),
		storeGossiper: gossiputil.NewStoreGossiper(g),
		nodes:         make(map[proto.NodeID]*Node),
		stores:        make(map[proto.StoreID]*Store),
		ranges:        make(map[proto.RangeID]*Range),
		rand:          rand,
		seed:          seed,
	}

	// Add the nodes.
	for i := 0; i < nodeCount; i++ {
		c.addNewNodeWithStore()
	}

	// Add a single range and add to this first node's first store.
	firstRange := c.addRange()
	firstRange.attachRangeToStore(c.stores[proto.StoreID(0)])
	return c
}

示例#21
文件: client_test.go 项目: codeVerySlow/cockroach

// startGossip creates and starts a gossip instance.
func startGossip(nodeID roachpb.NodeID, stopper *stop.Stopper, t *testing.T) *Gossip {
	clock := hlc.NewClock(hlc.UnixNano)
	rpcContext := rpc.NewContext(&base.Context{Insecure: true}, clock, stopper)

	addr := util.CreateTestAddr("tcp")
	server := rpc.NewServer(rpcContext)
	tlsConfig, err := rpcContext.GetServerTLSConfig()
	if err != nil {
		t.Fatal(err)
	}
	ln, err := util.ListenAndServe(stopper, server, addr, tlsConfig)
	if err != nil {
		t.Fatal(err)
	}
	g := New(rpcContext, TestBootstrap, stopper)
	g.SetNodeID(nodeID)
	if err := g.SetNodeDescriptor(&roachpb.NodeDescriptor{
		NodeID:  nodeID,
		Address: util.MakeUnresolvedAddr(addr.Network(), addr.String()),
	}); err != nil {
		t.Fatal(err)
	}
	g.start(server, ln.Addr())
	time.Sleep(time.Millisecond)
	return g
}

示例#22
文件: node_test.go 项目: kangxinrong/cockroach

// createTestNode creates an rpc server using the specified address,
// gossip instance, KV database and a node using the specified slice
// of engines. The server, clock and node are returned. If gossipBS is
// not nil, the gossip bootstrap address is set to gossipBS.
func createTestNode(addr net.Addr, engines []engine.Engine, gossipBS net.Addr, t *testing.T) (
	*rpc.Server, *hlc.Clock, *Node, *stop.Stopper) {
	ctx := storage.StoreContext{}

	stopper := stop.NewStopper()
	ctx.Clock = hlc.NewClock(hlc.UnixNano)
	nodeRPCContext := rpc.NewContext(nodeTestBaseContext, ctx.Clock, stopper)
	ctx.ScanInterval = 10 * time.Hour
	rpcServer := rpc.NewServer(addr, nodeRPCContext)
	if err := rpcServer.Start(); err != nil {
		t.Fatal(err)
	}
	g := gossip.New(nodeRPCContext, testContext.GossipInterval, testContext.GossipBootstrapResolvers)
	if gossipBS != nil {
		// Handle possibility of a :0 port specification.
		if gossipBS == addr {
			gossipBS = rpcServer.Addr()
		}
		g.SetResolvers([]resolver.Resolver{resolver.NewResolverFromAddress(gossipBS)})
		g.Start(rpcServer, stopper)
	}
	ctx.Gossip = g
	sender := kv.NewDistSender(&kv.DistSenderContext{Clock: ctx.Clock}, g)
	ctx.DB = client.NewDB(sender)
	// TODO(bdarnell): arrange to have the transport closed.
	// (or attach LocalRPCTransport.Close to the stopper)
	ctx.Transport = multiraft.NewLocalRPCTransport(stopper)
	ctx.EventFeed = util.NewFeed(stopper)
	node := NewNode(ctx)
	return rpcServer, ctx.Clock, node, stopper
}

示例#23
文件: txn_coord_sender_test.go 项目: kimh/cockroach

// TestTxnCoordSenderErrorWithIntent validates that if a transactional request
// returns an error but also indicates a Writing transaction, the coordinator
// tracks it just like a successful request.
func TestTxnCoordSenderErrorWithIntent(t *testing.T) {
	defer leaktest.AfterTest(t)
	stopper := stop.NewStopper()
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(20)

	ts := NewTxnCoordSender(senderFn(func(_ context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
		txn := ba.Txn.Clone()
		txn.Writing = true
		pErr := roachpb.NewError(roachpb.NewTransactionRetryError())
		pErr.SetTxn(txn)
		return nil, pErr
	}), clock, false, nil, stopper)
	defer stopper.Stop()

	var ba roachpb.BatchRequest
	key := roachpb.Key("test")
	ba.Add(&roachpb.BeginTransactionRequest{Span: roachpb.Span{Key: key}})
	ba.Add(&roachpb.PutRequest{Span: roachpb.Span{Key: key}})
	ba.Add(&roachpb.EndTransactionRequest{})
	ba.Txn = &roachpb.Transaction{Name: "test"}
	if _, pErr := ts.Send(context.Background(), ba); !testutils.IsPError(pErr, "retry txn") {
		t.Fatalf("unexpected error: %v", pErr)
	}

	defer teardownHeartbeats(ts)
	ts.Lock()
	defer ts.Unlock()
	if len(ts.txns) != 1 {
		t.Fatalf("expected transaction to be tracked")
	}
}

示例#24
文件: clock_offset_test.go 项目: cuongdo/cockroach

// TestFindOffsetWithLargeError tests a case where offset errors are
// bigger than the max offset (e.g., a case where heartbeat messages
// to the node are having high latency).
func TestFindOffsetWithLargeError(t *testing.T) {
	defer leaktest.AfterTest(t)()
	maxOffset := 100 * time.Nanosecond

	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(maxOffset)
	offsets := map[string]RemoteOffset{}
	// Offsets are bigger than maxOffset, but Errors are also bigger than Offset.
	offsets["0"] = RemoteOffset{Offset: 110, Uncertainty: 300}
	offsets["1"] = RemoteOffset{Offset: 120, Uncertainty: 300}
	offsets["2"] = RemoteOffset{Offset: 130, Uncertainty: 300}

	remoteClocks := newRemoteClockMonitor(clock)
	remoteClocks.mu.offsets = offsets

	interval, err := remoteClocks.findOffsetInterval()
	if err != nil {
		t.Fatal(err)
	}
	expectedInterval := clusterOffsetInterval{lowerbound: -270, upperbound: 510}
	if interval != expectedInterval {
		t.Errorf("expected interval %v, instead %v", expectedInterval, interval)
	}
	// The interval is still considered healthy.
	assertIntervalHealth(true, interval, maxOffset, t)
}

示例#25
文件: node.go 项目: JonathanHub/cockroach

// BootstrapCluster bootstraps a multiple stores using the provided engines and
// cluster ID. The first bootstrapped store contains a single range spanning
// all keys. Initial range lookup metadata is populated for the range.
//
// Returns a KV client for unittest purposes. Caller should close the returned
// client.
func BootstrapCluster(clusterID string, engines []engine.Engine, stopper *stop.Stopper) (*client.DB, error) {
	ctx := storage.StoreContext{}
	ctx.ScanInterval = 10 * time.Minute
	ctx.Clock = hlc.NewClock(hlc.UnixNano)
	// Create a KV DB with a local sender.
	lSender := kv.NewLocalSender()
	sender := kv.NewTxnCoordSender(lSender, ctx.Clock, false, nil, stopper)
	ctx.DB = client.NewDB(sender)
	ctx.Transport = multiraft.NewLocalRPCTransport(stopper)
	for i, eng := range engines {
		sIdent := roachpb.StoreIdent{
			ClusterID: clusterID,
			NodeID:    1,
			StoreID:   roachpb.StoreID(i + 1),
		}

		// The bootstrapping store will not connect to other nodes so its
		// StoreConfig doesn't really matter.
		s := storage.NewStore(ctx, eng, &roachpb.NodeDescriptor{NodeID: 1})

		// Verify the store isn't already part of a cluster.
		if len(s.Ident.ClusterID) > 0 {
			return nil, util.Errorf("storage engine already belongs to a cluster (%s)", s.Ident.ClusterID)
		}

		// Bootstrap store to persist the store ident.
		if err := s.Bootstrap(sIdent, stopper); err != nil {
			return nil, err
		}
		// Create first range, writing directly to engine. Note this does
		// not create the range, just its data.  Only do this if this is the
		// first store.
		if i == 0 {
			// TODO(marc): this is better than having storage/ import sql, but still
			// not great. Find a better place to keep those.
			initialValues := sql.GetInitialSystemValues()
			if err := s.BootstrapRange(initialValues); err != nil {
				return nil, err
			}
		}
		if err := s.Start(stopper); err != nil {
			return nil, err
		}

		lSender.AddStore(s)

		// Initialize node and store ids.  Only initialize the node once.
		if i == 0 {
			if nodeID, err := allocateNodeID(ctx.DB); nodeID != sIdent.NodeID || err != nil {
				return nil, util.Errorf("expected to initialize node id allocator to %d, got %d: %s",
					sIdent.NodeID, nodeID, err)
			}
		}
		if storeID, err := allocateStoreIDs(sIdent.NodeID, 1, ctx.DB); storeID != sIdent.StoreID || err != nil {
			return nil, util.Errorf("expected to initialize store id allocator to %d, got %d: %s",
				sIdent.StoreID, storeID, err)
		}
	}
	return ctx.DB, nil
}

示例#26
文件: timestamp_cache_test.go 项目: CubeLite/cockroach

// TestTimestampCacheNoEviction verifies that even after
// the MinTSCacheWindow interval, if the cache has not hit
// its size threshold, it will not evict entries.
func TestTimestampCacheNoEviction(t *testing.T) {
	defer leaktest.AfterTest(t)()
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(maxClockOffset)
	tc := newTimestampCache(clock)

	// Increment time to the maxClockOffset low water mark + 1.
	manual.Set(maxClockOffset.Nanoseconds() + 1)
	aTS := clock.Now()
	tc.add(roachpb.Key("a"), nil, aTS, nil, true)
	tc.AddRequest(cacheRequest{
		reads:     []roachpb.Span{{Key: roachpb.Key("c")}},
		timestamp: aTS,
	})

	// Increment time by the MinTSCacheWindow and add another key.
	manual.Increment(MinTSCacheWindow.Nanoseconds())
	tc.add(roachpb.Key("b"), nil, clock.Now(), nil, true)
	tc.AddRequest(cacheRequest{
		reads:     []roachpb.Span{{Key: roachpb.Key("d")}},
		timestamp: clock.Now(),
	})

	// Verify that the cache still has 4 entries in it
	if l, want := tc.len(), 4; l != want {
		t.Errorf("expected %d entries to remain, got %d", want, l)
	}
}

示例#27
文件: clock_offset_test.go 项目: cuongdo/cockroach

// TestBuildEndpointListRemoveStagnantClocks tests the side effect of removing
// older offsets when we build an endpoint list.
func TestBuildEndpointListRemoveStagnantClocks(t *testing.T) {
	defer leaktest.AfterTest(t)()
	offsets := map[string]RemoteOffset{
		"0":         {Offset: 0, Uncertainty: 10, MeasuredAt: 11},
		"stagnant0": {Offset: 1, Uncertainty: 10, MeasuredAt: 0},
		"1":         {Offset: 2, Uncertainty: 10, MeasuredAt: 20},
		"stagnant1": {Offset: 3, Uncertainty: 10, MeasuredAt: 9},
	}

	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(5 * time.Nanosecond)
	remoteClocks := newRemoteClockMonitor(clock)
	// The stagnant offsets older than this will be removed.
	remoteClocks.monitorInterval = 10 * time.Nanosecond
	remoteClocks.mu.offsets = offsets
	remoteClocks.mu.lastMonitoredAt = time.Unix(0, 10) // offsets measured before this will be removed.

	remoteClocks.buildEndpointList()

	_, ok0 := offsets["stagnant0"]
	_, ok1 := offsets["stagnant1"]

	if ok0 || ok1 {
		t.Errorf("expected stagant offsets removed, instead offsets: %v", offsets)
	}
}

示例#28
文件: store_test.go 项目: backend2use/cockroachdb

// TestBootstrapOfNonEmptyStore verifies bootstrap failure if engine
// is not empty.
func TestBootstrapOfNonEmptyStore(t *testing.T) {
	defer leaktest.AfterTest(t)
	eng := engine.NewInMem(proto.Attributes{}, 1<<20)

	// Put some random garbage into the engine.
	if err := eng.Put(proto.EncodedKey("foo"), []byte("bar")); err != nil {
		t.Errorf("failure putting key foo into engine: %s", err)
	}
	ctx := TestStoreContext
	manual := hlc.NewManualClock(0)
	ctx.Clock = hlc.NewClock(manual.UnixNano)
	ctx.Transport = multiraft.NewLocalRPCTransport()
	stopper := stop.NewStopper()
	stopper.AddCloser(ctx.Transport)
	defer stopper.Stop()
	store := NewStore(ctx, eng, &proto.NodeDescriptor{NodeID: 1})

	// Can't init as haven't bootstrapped.
	if err := store.Start(stopper); err == nil {
		t.Error("expected failure init'ing un-bootstrapped store")
	}

	// Bootstrap should fail on non-empty engine.
	if err := store.Bootstrap(testIdent, stopper); err == nil {
		t.Error("expected bootstrap error on non-empty store")
	}
}

示例#29
文件: client_replica_test.go 项目: yangxuanjia/cockroach

// TestRejectFutureCommand verifies that lease holders reject commands that
// would cause a large time jump.
func TestRejectFutureCommand(t *testing.T) {
	defer leaktest.AfterTest(t)()

	const maxOffset = 100 * time.Millisecond
	manual := hlc.NewManualClock(0)
	clock := hlc.NewClock(manual.UnixNano)
	clock.SetMaxOffset(maxOffset)
	mtc := multiTestContext{
		clock: clock,
	}
	mtc.Start(t, 1)
	defer mtc.Stop()

	// First do a write. The first write will advance the clock by MaxOffset
	// because of the read cache's low water mark.
	getArgs := putArgs([]byte("b"), []byte("b"))
	if _, err := client.SendWrapped(rg1(mtc.stores[0]), nil, &getArgs); err != nil {
		t.Fatal(err)
	}
	if now := clock.Now(); now.WallTime != int64(maxOffset) {
		t.Fatalf("expected clock to advance to 100ms; got %s", now)
	}
	// The logical clock has advanced past the physical clock; increment
	// the "physical" clock to catch up.
	manual.Increment(int64(maxOffset))

	startTime := manual.UnixNano()

	// Commands with a future timestamp that is within the MaxOffset
	// bound will be accepted and will cause the clock to advance.
	for i := int64(0); i < 3; i++ {
		incArgs := incrementArgs([]byte("a"), 5)
		ts := hlc.ZeroTimestamp.Add(startTime+((i+1)*30)*int64(time.Millisecond), 0)
		if _, err := client.SendWrappedWith(rg1(mtc.stores[0]), nil, roachpb.Header{Timestamp: ts}, &incArgs); err != nil {
			t.Fatal(err)
		}
	}
	if now := clock.Now(); now.WallTime != int64(190*time.Millisecond) {
		t.Fatalf("expected clock to advance to 190ms; got %s", now)
	}

	// Once the accumulated offset reaches MaxOffset, commands will be rejected.
	incArgs := incrementArgs([]byte("a"), 11)
	ts := hlc.ZeroTimestamp.Add(int64((time.Duration(startTime)+maxOffset+1)*time.Millisecond), 0)
	if _, err := client.SendWrappedWith(rg1(mtc.stores[0]), nil, roachpb.Header{Timestamp: ts}, &incArgs); err == nil {
		t.Fatalf("expected clock offset error but got nil")
	}

	// The clock remained at 190ms and the final command was not executed.
	if now := clock.Now(); now.WallTime != int64(190*time.Millisecond) {
		t.Errorf("expected clock to advance to 190ms; got %s", now)
	}
	val, _, err := engine.MVCCGet(context.Background(), mtc.engines[0], roachpb.Key("a"), clock.Now(), true, nil)
	if err != nil {
		t.Fatal(err)
	}
	if v := mustGetInt(val); v != 15 {
		t.Errorf("expected 15, got %v", v)
	}
}

示例#30
文件: scanner_test.go 项目: YuleiXiao/cockroach

// TestScannerTiming verifies that ranges are scanned, regardless
// of how many, to match scanInterval.
func TestScannerTiming(t *testing.T) {
	defer leaktest.AfterTest(t)()
	const count = 3
	const runTime = 100 * time.Millisecond
	const maxError = 7500 * time.Microsecond
	durations := []time.Duration{
		15 * time.Millisecond,
		25 * time.Millisecond,
	}
	for i, duration := range durations {
		util.SucceedsSoon(t, func() error {
			ranges := newTestRangeSet(count, t)
			q := &testQueue{}
			s := newReplicaScanner(duration, 0, ranges)
			s.AddQueues(q)
			mc := hlc.NewManualClock(0)
			clock := hlc.NewClock(mc.UnixNano)
			stopper := stop.NewStopper()
			s.Start(clock, stopper)
			time.Sleep(runTime)
			stopper.Stop()

			avg := s.avgScan()
			log.Infof("%d: average scan: %s", i, avg)
			if avg.Nanoseconds()-duration.Nanoseconds() > maxError.Nanoseconds() ||
				duration.Nanoseconds()-avg.Nanoseconds() > maxError.Nanoseconds() {
				return errors.Errorf("expected %s, got %s: exceeds max error of %s", duration, avg, maxError)
			}
			return nil
		})
	}
}

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