Add id allocator ut (#7440)

Signed-off-by: godchen <qingxiang.chen@zilliz.com>

internal/allocator/id.go

@@ -18,11 +18,9 @@ import (
 
 	"go.uber.org/zap"
 
-	rcc "github.com/milvus-io/milvus/internal/distributed/rootcoord/client"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
-	"github.com/milvus-io/milvus/internal/types"
 	"github.com/milvus-io/milvus/internal/util/typeutil"
 )
 
@@ -32,12 +30,16 @@ const (
 
 type UniqueID = typeutil.UniqueID
 
+type idAllocatorInterface interface {
+	AllocID(ctx context.Context, req *rootcoordpb.AllocIDRequest) (*rootcoordpb.AllocIDResponse, error)
+}
+
 type IDAllocator struct {
 	Allocator
 
-	etcdEndpoints   []string
-	metaRoot        string
-	rootCoordClient types.RootCoord
+	etcdEndpoints []string
+	metaRoot      string
+	idAllocator   idAllocatorInterface
 
 	countPerRPC uint32
 
@@ -47,7 +49,7 @@ type IDAllocator struct {
 	PeerID UniqueID
 }
 
-func NewIDAllocator(ctx context.Context, metaRoot string, etcdEndpoints []string) (*IDAllocator, error) {
+func NewIDAllocator(ctx context.Context, idAlloctor idAllocatorInterface, peerID UniqueID) (*IDAllocator, error) {
 	ctx1, cancel := context.WithCancel(ctx)
 	a := &IDAllocator{
 		Allocator: Allocator{
@@ -55,9 +57,9 @@ func NewIDAllocator(ctx context.Context, metaRoot string, etcdEndpoints []string
 			CancelFunc: cancel,
 			Role:       "IDAllocator",
 		},
-		countPerRPC:   IDCountPerRPC,
-		metaRoot:      metaRoot,
-		etcdEndpoints: etcdEndpoints,
+		countPerRPC: IDCountPerRPC,
+		idAllocator: idAlloctor,
+		PeerID:      peerID,
 	}
 	a.TChan = &EmptyTicker{}
 	a.Allocator.SyncFunc = a.syncID
@@ -69,20 +71,6 @@ func NewIDAllocator(ctx context.Context, metaRoot string, etcdEndpoints []string
 }
 
 func (ia *IDAllocator) Start() error {
-	var err error
-
-	ia.rootCoordClient, err = rcc.NewClient(ia.Ctx, ia.metaRoot, ia.etcdEndpoints)
-	if err != nil {
-		panic(err)
-	}
-
-	if err = ia.rootCoordClient.Init(); err != nil {
-		panic(err)
-	}
-
-	if err = ia.rootCoordClient.Start(); err != nil {
-		panic(err)
-	}
 	return ia.Allocator.Start()
 }
 
@@ -112,7 +100,7 @@ func (ia *IDAllocator) syncID() (bool, error) {
 		},
 		Count: need,
 	}
-	resp, err := ia.rootCoordClient.AllocID(ctx, req)
+	resp, err := ia.idAllocator.AllocID(ctx, req)
 
 	cancel()
 	if err != nil {

internal/allocator/id_test.go

@@ -0,0 +1,62 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
+package allocator
+
+import (
+	"context"
+	"testing"
+
+	"github.com/milvus-io/milvus/internal/proto/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
+	"github.com/stretchr/testify/assert"
+)
+
+type mockIDAllocator struct {
+}
+
+func (tso *mockIDAllocator) AllocID(ctx context.Context, req *rootcoordpb.AllocIDRequest) (*rootcoordpb.AllocIDResponse, error) {
+	return &rootcoordpb.AllocIDResponse{
+		Status: &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_Success,
+			Reason:    "",
+		},
+		ID:    int64(1),
+		Count: req.Count,
+	}, nil
+}
+
+func newMockIDAllocator() *mockIDAllocator {
+	return &mockIDAllocator{}
+}
+
+func TestIDAllocator(t *testing.T) {
+	ctx := context.Background()
+	mockIDAllocator := newMockIDAllocator()
+
+	idAllocator, err := NewIDAllocator(ctx, mockIDAllocator, int64(1))
+	assert.Nil(t, err)
+	err = idAllocator.Start()
+	assert.Nil(t, err)
+
+	idStart, idEnd, err := idAllocator.Alloc(20000)
+	assert.Nil(t, err)
+	assert.Equal(t, idStart, int64(1))
+	assert.Equal(t, idEnd, int64(20001))
+
+	id, err := idAllocator.AllocOne()
+	assert.Nil(t, err)
+	assert.Equal(t, id, int64(20001))
+
+	id, err = idAllocator.AllocOne()
+	assert.Nil(t, err)
+	assert.Equal(t, id, int64(20002))
+}

internal/proxy/proxy.go

@@ -163,13 +163,12 @@ func (node *Proxy) Init() error {
 		return err
 	}
 
-	idAllocator, err := allocator.NewIDAllocator(node.ctx, Params.MetaRootPath, Params.EtcdEndpoints)
-
+	idAllocator, err := allocator.NewIDAllocator(node.ctx, node.rootCoord, Params.ProxyID)
 	if err != nil {
 		return err
 	}
+
 	node.idAllocator = idAllocator
-	node.idAllocator.PeerID = Params.ProxyID
 
 	tsoAllocator, err := NewTimestampAllocator(node.ctx, node.rootCoord, Params.ProxyID)
 	if err != nil {