diff --git a/store/etcdv3/helper.go b/store/etcdv3/helper.go
index be6b9fede..91f2083f4 100644
--- a/store/etcdv3/helper.go
+++ b/store/etcdv3/helper.go
@@ -5,10 +5,13 @@ import (
 	"os"
 	"strings"
 
+	enginetypes "github.com/docker/docker/api/types"
 	engineapi "github.com/docker/docker/client"
 	"github.com/docker/go-connections/tlsconfig"
+	enginemock "github.com/projecteru2/core/3rdmocks"
 	"github.com/projecteru2/core/types"
 	log "github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/mock"
 )
 
 func dumpFromString(ca, cert, key *os.File, caStr, certStr, keyStr string) error {
@@ -29,6 +32,13 @@ func dumpFromString(ca, cert, key *os.File, caStr, certStr, keyStr string) error
 	return nil
 }
 
+func makeMockClient() (engineapi.APIClient, error) {
+	engine := &enginemock.APIClient{}
+	engine.On("Info", mock.AnythingOfType("*context.emptyCtx")).Return(
+		enginetypes.Info{NCPU: 1, MemTotal: types.GByte + 100}, nil)
+	return engine, nil
+}
+
 func makeRawClient(endpoint, apiversion string) (engineapi.APIClient, error) {
 	return engineapi.NewClient(endpoint, apiversion, nil, nil)
 }
diff --git a/store/etcdv3/mercury.go b/store/etcdv3/mercury.go
index ab3d7eb9f..4d5045d89 100644
--- a/store/etcdv3/mercury.go
+++ b/store/etcdv3/mercury.go
@@ -18,6 +18,7 @@ import (
 const (
 	nodeTCPPrefixKey  = "tcp://"
 	nodeSockPrefixKey = "unix://"
+	nodeMockPrefixKey = "mock://"
 
 	podInfoKey  = "/pod/info/%s"
 	podNodesKey = "/pod/nodes/%s"    // /pod/nodes/pod1/node1 /pod/nodes/pod1/node2
diff --git a/store/etcdv3/node.go b/store/etcdv3/node.go
index b25ad3379..7c18bd4e9 100644
--- a/store/etcdv3/node.go
+++ b/store/etcdv3/node.go
@@ -20,7 +20,9 @@ import (
 // storage path in etcd is `/pod/nodes/:podname/:nodename`
 // node->pod path in etcd is `/node/pod/:nodename`
 func (m *Mercury) AddNode(ctx context.Context, name, endpoint, podname, ca, cert, key string, cpu, share int, memory int64, labels map[string]string) (*types.Node, error) {
-	if !strings.HasPrefix(endpoint, nodeTCPPrefixKey) && !strings.HasPrefix(endpoint, nodeSockPrefixKey) {
+	if !strings.HasPrefix(endpoint, nodeTCPPrefixKey) &&
+		!strings.HasPrefix(endpoint, nodeSockPrefixKey) &&
+		!strings.HasPrefix(endpoint, nodeMockPrefixKey) {
 		return nil, types.NewDetailedErr(types.ErrNodeFormat,
 			fmt.Sprintf("endpoint must starts with %s or %s %q",
 				nodeTCPPrefixKey, nodeSockPrefixKey, endpoint))
@@ -315,6 +317,9 @@ func (m *Mercury) makeDockerClient(ctx context.Context, podname, nodename, endpo
 }
 
 func (m *Mercury) doMakeDockerClient(ctx context.Context, nodename, endpoint, ca, cert, key string) (engineapi.APIClient, error) {
+	if strings.HasPrefix(endpoint, nodeMockPrefixKey) {
+		return makeMockClient()
+	}
 	if m.config.Docker.CertPath == "" || (ca == "" || cert == "" || key == "") {
 		return makeRawClient(endpoint, m.config.Docker.APIVersion)
 	}
diff --git a/store/etcdv3/node_test.go b/store/etcdv3/node_test.go
index 837d84796..485b80693 100644
--- a/store/etcdv3/node_test.go
+++ b/store/etcdv3/node_test.go
@@ -15,6 +15,7 @@ func TestNode(t *testing.T) {
 	m := NewMercury(t, etcd.RandClient())
 	ctx := context.Background()
 	nodename := "testnode"
+	nodename2 := "testnode2"
 	endpoint := "tcp://127.0.0.1:2376"
 	podname := "testpod"
 	_, err := m.AddPod(ctx, podname, "CPU", "")
@@ -22,24 +23,35 @@ func TestNode(t *testing.T) {
 	cpu := 1
 	share := 100
 	memory := int64(100)
+	m.config.Scheduler.ShareBase = 100
 	labels := map[string]string{"test": "1"}
 
+	// wrong endpoint
 	_, err = m.AddNode(ctx, nodename, "abc", podname, "", "", "", cpu, share, memory, labels)
 	assert.Error(t, err)
+	// wrong because engine not mocked
 	_, err = m.AddNode(ctx, nodename, endpoint, podname, "", "", "", cpu, share, memory, labels)
-	// wrong endpoint
 	assert.Error(t, err)
-	// TODO there is no way to mock docker client, may be run a docker to do it.
-	// So we test doAddNode
-	node, err := m.doAddNode(ctx, nodename, endpoint, podname, "", "", "", cpu, share, memory, labels)
+
+	endpoint = "mock://mockdocker"
+	// AddNode
+	node, err := m.AddNode(ctx, nodename, endpoint, podname, "", "", "", cpu, share, memory, labels)
 	assert.NoError(t, err)
 	assert.Equal(t, node.Name, nodename)
 	assert.Equal(t, node.CPU["0"], 100)
-	_, err = m.doAddNode(ctx, nodename, endpoint, podname, "", "", "", cpu, share, memory, labels)
+	// Addnode again will failed
+	_, err = m.AddNode(ctx, nodename, endpoint, podname, "", "", "", cpu, share, memory, labels)
 	assert.Error(t, err)
+	// Check etcd has node data
 	key := fmt.Sprintf(nodeInfoKey, podname, nodename)
 	ev, err := m.GetOne(ctx, key)
 	assert.NoError(t, err)
+	// AddNode with mocked engine and default value
+	node3, err := m.AddNode(ctx, nodename2, endpoint, podname, "", "", "", 0, 0, 0, labels)
+	assert.NoError(t, err)
+	assert.Equal(t, node3.CPU["0"], 100)
+	assert.Equal(t, len(node3.CPU), 1)
+	assert.Equal(t, node3.MemCap, int64(100))
 	// GetNode
 	_, err = m.GetNode(ctx, "nil", nodename)
 	assert.Error(t, err)
@@ -65,14 +77,14 @@ func TestNode(t *testing.T) {
 	assert.Equal(t, len(nodes), 0)
 	nodes, err = m.GetNodesByPod(ctx, podname)
 	assert.NoError(t, err)
-	assert.Equal(t, len(nodes), 1)
+	assert.Equal(t, len(nodes), 2)
 	savedNode = nodes[0]
 	assert.Equal(t, savedNode.Name, node.Name)
 	assert.Equal(t, savedNode.Endpoint, node.Endpoint)
 	// GetAllNodes
 	nodes, err = m.GetAllNodes(ctx)
 	assert.NoError(t, err)
-	assert.Equal(t, len(nodes), 1)
+	assert.Equal(t, len(nodes), 2)
 	savedNode = nodes[0]
 	assert.Equal(t, savedNode.Name, node.Name)
 	assert.Equal(t, savedNode.Endpoint, node.Endpoint)
@@ -165,11 +177,11 @@ Dl0aR0+ZbHq5hv5feDdpeKxMxKkKnCu1cl47gKAyFet5nvK7htBUk9aIph8zDBZj
 cmag5uyTcIogsd5GyOg06jDD1aCqz3FbTX1KQLeSFQUCTT+m100rohrc2rW5m4Al
 RdCPRPt513WozkJZZAjUSP2U
 -----END PRIVATE KEY-----`
-	nodename2 := "n2"
-	node2, err := m.doAddNode(ctx, nodename2, endpoint, podname, ca, cert, certkey, cpu, share, memory, labels)
+	nodename3 := "nodename3"
+	node2, err := m.AddNode(ctx, nodename3, endpoint, podname, ca, cert, certkey, cpu, share, memory, labels)
 	assert.NoError(t, err)
 	m.config.Docker.CertPath = "/tmp"
-	_, err = m.makeDockerClient(ctx, podname, nodename2, endpoint, true)
+	_, err = m.makeDockerClient(ctx, podname, nodename3, endpoint, true)
 	assert.NoError(t, err)
 	// DeleteNode
 	m.DeleteNode(ctx, node2)