package rootcoord

import (
	"context"
	"errors"
	"fmt"
	"math/rand"
	"sync"
	"testing"
	"time"

	"github.com/golang/protobuf/proto"
	"github.com/milvus-io/milvus-proto/go-api/commonpb"
	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
	"github.com/milvus-io/milvus/internal/allocator"
	"github.com/milvus-io/milvus/internal/kv"
	"github.com/milvus-io/milvus/internal/metastore/model"
	"github.com/milvus-io/milvus/internal/proto/datapb"
	"github.com/milvus-io/milvus/internal/proto/etcdpb"
	pb "github.com/milvus-io/milvus/internal/proto/etcdpb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
	"github.com/milvus-io/milvus/internal/proto/proxypb"
	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
	mockrootcoord "github.com/milvus-io/milvus/internal/rootcoord/mocks"
	"github.com/milvus-io/milvus/internal/util/dependency"
	"github.com/milvus-io/milvus/internal/util/etcd"
	"github.com/milvus-io/milvus/internal/util/funcutil"
	"github.com/milvus-io/milvus/internal/util/metricsinfo"
	"github.com/milvus-io/milvus/internal/util/sessionutil"
	"github.com/milvus-io/milvus/internal/util/typeutil"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

func TestRootCoord_CreateCollection(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())

		ctx := context.Background()
		resp, err := c.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_DropCollection(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.DropCollection(ctx, &milvuspb.DropCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.DropCollection(ctx, &milvuspb.DropCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())

		ctx := context.Background()
		resp, err := c.DropCollection(ctx, &milvuspb.DropCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.DropCollection(ctx, &milvuspb.DropCollectionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_DescribeCollection(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to get collection by name", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64")).
			Return(nil, errors.New("error mock GetCollectionByName"))

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{CollectionName: "test"})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to get collection by id", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByID",
			mock.Anything, // context.Context
			mock.AnythingOfType("int64"),
			mock.AnythingOfType("uint64")).
			Return(nil, errors.New("error mock GetCollectionByID"))

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{CollectionID: 100})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64")).
			Return(&model.Collection{CollectionID: 100}, nil)
		meta.On("ListAliasesByID",
			mock.AnythingOfType("int64")).
			Return([]string{"alias1", "alias2"})

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{CollectionName: "test"})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.Equal(t, UniqueID(100), resp.GetCollectionID())
		assert.ElementsMatch(t, []string{"alias1", "alias2"}, resp.GetAliases())
	})
}

func TestRootCoord_HasCollection(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.HasCollection(ctx, &milvuspb.HasCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64"),
		).Return(func(ctx context.Context, collectionName string, ts Timestamp) *model.Collection {
			if ts == typeutil.MaxTimestamp {
				return &model.Collection{}
			}
			return nil
		}, func(ctx context.Context, collectionName string, ts Timestamp) error {
			if ts == typeutil.MaxTimestamp {
				return nil
			}
			return errors.New("error mock GetCollectionByName")
		})

		c := newTestCore(withHealthyCode(), withMeta(meta))
		ctx := context.Background()

		resp, err := c.HasCollection(ctx, &milvuspb.HasCollectionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.True(t, resp.GetValue())

		resp, err = c.HasCollection(ctx, &milvuspb.HasCollectionRequest{TimeStamp: typeutil.MaxTimestamp})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.True(t, resp.GetValue())

		resp, err = c.HasCollection(ctx, &milvuspb.HasCollectionRequest{TimeStamp: 100})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.False(t, resp.GetValue())
	})
}

func TestRootCoord_ShowCollections(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.ShowCollections(ctx, &milvuspb.ShowCollectionsRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("ListCollections",
			mock.Anything, // context.Context
			mock.AnythingOfType("uint64")).
			Return(func(ctx context.Context, ts Timestamp) []*model.Collection {
				if ts == typeutil.MaxTimestamp {
					return []*model.Collection{
						{
							CollectionID: 100,
							Name:         "test",
							State:        pb.CollectionState_CollectionCreated,
						},
					}
				}
				return nil
			}, func(ctx context.Context, ts Timestamp) error {
				if ts == typeutil.MaxTimestamp {
					return nil
				}
				return errors.New("error mock ListCollections")
			})

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.ShowCollections(ctx, &milvuspb.ShowCollectionsRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.ElementsMatch(t, []int64{100}, resp.GetCollectionIds())
		assert.ElementsMatch(t, []string{"test"}, resp.GetCollectionNames())

		resp, err = c.ShowCollections(ctx, &milvuspb.ShowCollectionsRequest{TimeStamp: typeutil.MaxTimestamp})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.ElementsMatch(t, []int64{100}, resp.GetCollectionIds())
		assert.ElementsMatch(t, []string{"test"}, resp.GetCollectionNames())

		resp, err = c.ShowCollections(ctx, &milvuspb.ShowCollectionsRequest{TimeStamp: 10000})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})
}

func TestRootCoord_CreatePartition(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())

		ctx := context.Background()
		resp, err := c.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_DropPartition(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.DropPartition(ctx, &milvuspb.DropPartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.DropPartition(ctx, &milvuspb.DropPartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())

		ctx := context.Background()
		resp, err := c.DropPartition(ctx, &milvuspb.DropPartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.DropPartition(ctx, &milvuspb.DropPartitionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_HasPartition(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.HasPartition(ctx, &milvuspb.HasPartitionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64"),
		).Return(func(ctx context.Context, collectionName string, ts Timestamp) *model.Collection {
			if collectionName == "test1" {
				return &model.Collection{Partitions: []*model.Partition{{PartitionName: "test_partition"}}}
			}
			return nil
		}, func(ctx context.Context, collectionName string, ts Timestamp) error {
			if collectionName == "test1" {
				return nil
			}
			return errors.New("error mock GetCollectionByName")
		})

		c := newTestCore(withHealthyCode(), withMeta(meta))
		ctx := context.Background()

		resp, err := c.HasPartition(ctx, &milvuspb.HasPartitionRequest{CollectionName: "error_case"})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())

		resp, err = c.HasPartition(ctx, &milvuspb.HasPartitionRequest{CollectionName: "test1", PartitionName: "test_partition"})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.True(t, resp.GetValue())

		resp, err = c.HasPartition(ctx, &milvuspb.HasPartitionRequest{CollectionName: "test1", PartitionName: "non_exist"})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.False(t, resp.GetValue())
	})
}

func TestRootCoord_ShowPartitions(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.ShowPartitions(ctx, &milvuspb.ShowPartitionsRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to get collection by name", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64")).
			Return(nil, errors.New("error mock GetCollectionByName"))

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.ShowPartitions(ctx, &milvuspb.ShowPartitionsRequest{CollectionName: "test"})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to get collection by id", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByID",
			mock.Anything, // context.Context
			mock.AnythingOfType("int64"),
			mock.AnythingOfType("uint64")).
			Return(nil, errors.New("error mock GetCollectionByID"))

		c := newTestCore(withHealthyCode(),
			withMeta(meta))

		ctx := context.Background()

		resp, err := c.ShowPartitions(ctx, &milvuspb.ShowPartitionsRequest{CollectionID: 100})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("uint64"),
		).Return(&model.Collection{Partitions: []*model.Partition{{
			PartitionName: "test_partition",
			PartitionID:   102,
		}}}, nil)

		c := newTestCore(withHealthyCode(), withMeta(meta))
		ctx := context.Background()

		resp, err := c.ShowPartitions(ctx, &milvuspb.ShowPartitionsRequest{CollectionName: "test"})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.ElementsMatch(t, []string{"test_partition"}, resp.GetPartitionNames())
		assert.ElementsMatch(t, []int64{102}, resp.GetPartitionIDs())
	})
}

func TestRootCoord_CreateAlias(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.CreateAlias(ctx, &milvuspb.CreateAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.CreateAlias(ctx, &milvuspb.CreateAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())
		ctx := context.Background()
		resp, err := c.CreateAlias(ctx, &milvuspb.CreateAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())
		ctx := context.Background()
		resp, err := c.CreateAlias(ctx, &milvuspb.CreateAliasRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_DropAlias(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.DropAlias(ctx, &milvuspb.DropAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.DropAlias(ctx, &milvuspb.DropAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())
		ctx := context.Background()
		resp, err := c.DropAlias(ctx, &milvuspb.DropAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())
		ctx := context.Background()
		resp, err := c.DropAlias(ctx, &milvuspb.DropAliasRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_AlterAlias(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		c := newTestCore(withAbnormalCode())
		ctx := context.Background()
		resp, err := c.AlterAlias(ctx, &milvuspb.AlterAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.AlterAlias(ctx, &milvuspb.AlterAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to execute", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())
		ctx := context.Background()
		resp, err := c.AlterAlias(ctx, &milvuspb.AlterAliasRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case, everything is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())
		ctx := context.Background()
		resp, err := c.AlterAlias(ctx, &milvuspb.AlterAliasRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_AllocTimestamp(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.AllocTimestamp(ctx, &rootcoordpb.AllocTimestampRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to allocate ts", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withInvalidTsoAllocator())
		resp, err := c.AllocTimestamp(ctx, &rootcoordpb.AllocTimestampRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		alloc := newMockTsoAllocator()
		count := uint32(10)
		ts := Timestamp(100)
		alloc.GenerateTSOF = func(count uint32) (uint64, error) {
			// end ts
			return ts, nil
		}
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withTsoAllocator(alloc))
		resp, err := c.AllocTimestamp(ctx, &rootcoordpb.AllocTimestampRequest{Count: count})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		// begin ts
		assert.Equal(t, ts-uint64(count)+1, resp.GetTimestamp())
		assert.Equal(t, count, resp.GetCount())
	})
}

func TestRootCoord_AllocID(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.AllocID(ctx, &rootcoordpb.AllocIDRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to allocate id", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withInvalidIDAllocator())
		resp, err := c.AllocID(ctx, &rootcoordpb.AllocIDRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		alloc := newMockIDAllocator()
		id := UniqueID(100)
		alloc.AllocF = func(count uint32) (allocator.UniqueID, allocator.UniqueID, error) {
			return id, id + int64(count), nil
		}
		count := uint32(10)
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withIDAllocator(alloc))
		resp, err := c.AllocID(ctx, &rootcoordpb.AllocIDRequest{Count: count})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.Equal(t, id, resp.GetID())
		assert.Equal(t, count, resp.GetCount())
	})
}

func TestRootCoord_UpdateChannelTimeTick(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.UpdateChannelTimeTick(ctx, &internalpb.ChannelTimeTickMsg{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("invalid msg type", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		resp, err := c.UpdateChannelTimeTick(ctx, &internalpb.ChannelTimeTickMsg{Base: &commonpb.MsgBase{MsgType: commonpb.MsgType_DropCollection}})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("invalid msg", func(t *testing.T) {
		defer cleanTestEnv()

		ticker := newRocksMqTtSynchronizer()

		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withTtSynchronizer(ticker))

		// the length of channel names & timestamps mismatch.
		resp, err := c.UpdateChannelTimeTick(ctx, &internalpb.ChannelTimeTickMsg{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_TimeTick,
			},
			ChannelNames: []string{funcutil.GenRandomStr()},
			Timestamps:   []uint64{},
		})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		defer cleanTestEnv()

		source := int64(20220824)
		ts := Timestamp(100)
		defaultTs := Timestamp(101)

		ticker := newRocksMqTtSynchronizer()
		ticker.addSession(&sessionutil.Session{ServerID: source})

		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withTtSynchronizer(ticker))

		resp, err := c.UpdateChannelTimeTick(ctx, &internalpb.ChannelTimeTickMsg{
			Base: &commonpb.MsgBase{
				SourceID: source,
				MsgType:  commonpb.MsgType_TimeTick,
			},
			ChannelNames:     []string{funcutil.GenRandomStr()},
			Timestamps:       []uint64{ts},
			DefaultTimestamp: defaultTs,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_InvalidateCollectionMetaCache(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.InvalidateCollectionMetaCache(ctx, &proxypb.InvalidateCollMetaCacheRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("failed to invalidate cache", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withInvalidProxyManager())
		resp, err := c.InvalidateCollectionMetaCache(ctx, &proxypb.InvalidateCollMetaCacheRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withValidProxyManager())
		resp, err := c.InvalidateCollectionMetaCache(ctx, &proxypb.InvalidateCollMetaCacheRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_ShowConfigurations(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.ShowConfigurations(ctx, &internalpb.ShowConfigurationsRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		Params.InitOnce()

		pattern := "Port"
		req := &internalpb.ShowConfigurationsRequest{
			Base: &commonpb.MsgBase{
				MsgID: rand.Int63(),
			},
			Pattern: pattern,
		}

		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		resp, err := c.ShowConfigurations(ctx, req)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
		assert.Equal(t, 1, len(resp.GetConfiguations()))
		assert.Equal(t, "rootcoord.port", resp.GetConfiguations()[0].Key)
	})
}

func TestRootCoord_GetMetrics(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.GetMetrics(ctx, &milvuspb.GetMetricsRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("failed to parse metric type", func(t *testing.T) {
		req := &milvuspb.GetMetricsRequest{
			Request: "invalid request",
		}
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		resp, err := c.GetMetrics(ctx, req)
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("unsupported metric type", func(t *testing.T) {
		// unsupported metric type
		unsupportedMetricType := "unsupported"
		req, err := metricsinfo.ConstructRequestByMetricType(unsupportedMetricType)
		assert.NoError(t, err)
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		resp, err := c.GetMetrics(ctx, req)
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		systemInfoMetricType := metricsinfo.SystemInfoMetrics
		req, err := metricsinfo.ConstructRequestByMetricType(systemInfoMetricType)
		assert.NoError(t, err)
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMetricsCacheManager())
		resp, err := c.GetMetrics(ctx, req)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("get system info metrics from cache", func(t *testing.T) {
		systemInfoMetricType := metricsinfo.SystemInfoMetrics
		req, err := metricsinfo.ConstructRequestByMetricType(systemInfoMetricType)
		assert.NoError(t, err)
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMetricsCacheManager())
		c.metricsCacheManager.UpdateSystemInfoMetrics(&milvuspb.GetMetricsResponse{
			Status:        succStatus(),
			Response:      "cached response",
			ComponentName: "cached component",
		})
		resp, err := c.GetMetrics(ctx, req)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("get system info metrics, cache miss", func(t *testing.T) {
		systemInfoMetricType := metricsinfo.SystemInfoMetrics
		req, err := metricsinfo.ConstructRequestByMetricType(systemInfoMetricType)
		assert.NoError(t, err)
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMetricsCacheManager())
		c.metricsCacheManager.InvalidateSystemInfoMetrics()
		resp, err := c.GetMetrics(ctx, req)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("get system info metrics", func(t *testing.T) {
		systemInfoMetricType := metricsinfo.SystemInfoMetrics
		req, err := metricsinfo.ConstructRequestByMetricType(systemInfoMetricType)
		assert.NoError(t, err)
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMetricsCacheManager())
		resp, err := c.getSystemInfoMetrics(ctx, req)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})
}

func TestCore_Import(t *testing.T) {
	meta := newMockMetaTable()
	meta.AddCollectionFunc = func(ctx context.Context, coll *model.Collection) error {
		return nil
	}
	meta.ChangeCollectionStateFunc = func(ctx context.Context, collectionID UniqueID, state etcdpb.CollectionState, ts Timestamp) error {
		return nil
	}

	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.Import(ctx, &milvuspb.ImportRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("bad collection name", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMeta(meta))
		meta.GetCollectionIDByNameFunc = func(name string) (UniqueID, error) {
			return 0, errors.New("error mock GetCollectionIDByName")
		}
		meta.GetCollectionByNameFunc = func(ctx context.Context, collectionName string, ts Timestamp) (*model.Collection, error) {
			return nil, errors.New("collection name not found")
		}
		_, err := c.Import(ctx, &milvuspb.ImportRequest{
			CollectionName: "a-bad-name",
		})
		assert.Error(t, err)
	})

	t.Run("bad partition name", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMeta(meta))
		meta.GetCollectionIDByNameFunc = func(name string) (UniqueID, error) {
			return 100, nil
		}
		meta.GetCollectionVirtualChannelsFunc = func(colID int64) []string {
			return []string{"ch-1", "ch-2"}
		}
		meta.GetPartitionByNameFunc = func(collID UniqueID, partitionName string, ts Timestamp) (UniqueID, error) {
			return 0, errors.New("mock GetPartitionByNameFunc error")
		}
		_, err := c.Import(ctx, &milvuspb.ImportRequest{
			CollectionName: "a-good-name",
		})
		assert.Error(t, err)
	})

	t.Run("normal case", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode(),
			withMeta(meta))
		meta.GetCollectionIDByNameFunc = func(name string) (UniqueID, error) {
			return 100, nil
		}
		meta.GetCollectionVirtualChannelsFunc = func(colID int64) []string {
			return []string{"ch-1", "ch-2"}
		}
		meta.GetPartitionByNameFunc = func(collID UniqueID, partitionName string, ts Timestamp) (UniqueID, error) {
			return 101, nil
		}
		coll := &model.Collection{Name: "a-good-name"}
		meta.GetCollectionByNameFunc = func(ctx context.Context, collectionName string, ts Timestamp) (*model.Collection, error) {
			return coll.Clone(), nil
		}
		_, err := c.Import(ctx, &milvuspb.ImportRequest{
			CollectionName: "a-good-name",
		})
		assert.NoError(t, err)
	})
}

func TestCore_GetImportState(t *testing.T) {
	mockKv := &kv.MockMetaKV{}
	mockKv.InMemKv = sync.Map{}
	ti1 := &datapb.ImportTaskInfo{
		Id: 100,
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPending,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	ti2 := &datapb.ImportTaskInfo{
		Id: 200,
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPersisted,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	taskInfo1, err := proto.Marshal(ti1)
	assert.NoError(t, err)
	taskInfo2, err := proto.Marshal(ti2)
	assert.NoError(t, err)
	mockKv.Save(BuildImportTaskKey(1), "value")
	mockKv.Save(BuildImportTaskKey(100), string(taskInfo1))
	mockKv.Save(BuildImportTaskKey(200), string(taskInfo2))

	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.GetImportState(ctx, &milvuspb.GetImportStateRequest{
			Task: 100,
		})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		c.importManager = newImportManager(ctx, mockKv, nil, nil, nil, nil, nil, nil, nil)
		resp, err := c.GetImportState(ctx, &milvuspb.GetImportStateRequest{
			Task: 100,
		})
		assert.NoError(t, err)
		assert.Equal(t, int64(100), resp.GetId())
		assert.NotEqual(t, 0, resp.GetCreateTs())
		assert.Equal(t, commonpb.ImportState_ImportPending, resp.GetState())
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})
}

func TestCore_ListImportTasks(t *testing.T) {
	mockKv := &kv.MockMetaKV{}
	mockKv.InMemKv = sync.Map{}
	ti1 := &datapb.ImportTaskInfo{
		Id:             100,
		CollectionName: "collection-A",
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPending,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	ti2 := &datapb.ImportTaskInfo{
		Id:             200,
		CollectionName: "collection-A",
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPersisted,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	ti3 := &datapb.ImportTaskInfo{
		Id:             300,
		CollectionName: "collection-B",
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPersisted,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	taskInfo1, err := proto.Marshal(ti1)
	assert.NoError(t, err)
	taskInfo2, err := proto.Marshal(ti2)
	assert.NoError(t, err)
	taskInfo3, err := proto.Marshal(ti3)
	assert.NoError(t, err)
	mockKv.Save(BuildImportTaskKey(1), "value")
	mockKv.Save(BuildImportTaskKey(100), string(taskInfo1))
	mockKv.Save(BuildImportTaskKey(200), string(taskInfo2))
	mockKv.Save(BuildImportTaskKey(300), string(taskInfo3))

	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.ListImportTasks(ctx, &milvuspb.ListImportTasksRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})

	t.Run("normal case", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		c.importManager = newImportManager(ctx, mockKv, nil, nil, nil, nil, nil, nil, nil)
		resp, err := c.ListImportTasks(ctx, &milvuspb.ListImportTasksRequest{})
		assert.NoError(t, err)
		assert.Equal(t, 3, len(resp.GetTasks()))
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
	})
}

func TestCore_ReportImport(t *testing.T) {
	Params.RootCoordCfg.ImportTaskSubPath = "importtask"
	var countLock sync.RWMutex
	var globalCount = typeutil.UniqueID(0)
	var idAlloc = func(count uint32) (typeutil.UniqueID, typeutil.UniqueID, error) {
		countLock.Lock()
		defer countLock.Unlock()
		globalCount++
		return globalCount, 0, nil
	}
	mockKv := &kv.MockMetaKV{}
	mockKv.InMemKv = sync.Map{}
	ti1 := &datapb.ImportTaskInfo{
		Id: 100,
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPending,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	ti2 := &datapb.ImportTaskInfo{
		Id: 200,
		State: &datapb.ImportTaskState{
			StateCode: commonpb.ImportState_ImportPersisted,
		},
		CreateTs: time.Now().Unix() - 100,
	}
	taskInfo1, err := proto.Marshal(ti1)
	assert.NoError(t, err)
	taskInfo2, err := proto.Marshal(ti2)
	assert.NoError(t, err)
	mockKv.Save(BuildImportTaskKey(1), "value")
	mockKv.Save(BuildImportTaskKey(100), string(taskInfo1))
	mockKv.Save(BuildImportTaskKey(200), string(taskInfo2))

	ticker := newRocksMqTtSynchronizer()
	meta := newMockMetaTable()
	meta.GetCollectionByNameFunc = func(ctx context.Context, collectionName string, ts Timestamp) (*model.Collection, error) {
		return nil, errors.New("error mock GetCollectionByName")
	}
	meta.AddCollectionFunc = func(ctx context.Context, coll *model.Collection) error {
		return nil
	}
	meta.ChangeCollectionStateFunc = func(ctx context.Context, collectionID UniqueID, state etcdpb.CollectionState, ts Timestamp) error {
		return nil
	}

	dc := newMockDataCoord()
	dc.GetComponentStatesFunc = func(ctx context.Context) (*milvuspb.ComponentStates, error) {
		return &milvuspb.ComponentStates{
			State: &milvuspb.ComponentInfo{
				NodeID:    TestRootCoordID,
				StateCode: commonpb.StateCode_Healthy,
			},
			SubcomponentStates: nil,
			Status:             succStatus(),
		}, nil
	}
	dc.WatchChannelsFunc = func(ctx context.Context, req *datapb.WatchChannelsRequest) (*datapb.WatchChannelsResponse, error) {
		return &datapb.WatchChannelsResponse{Status: succStatus()}, nil
	}
	dc.FlushFunc = func(ctx context.Context, req *datapb.FlushRequest) (*datapb.FlushResponse, error) {
		return &datapb.FlushResponse{Status: succStatus()}, nil
	}

	mockCallImportServiceErr := false
	callImportServiceFn := func(ctx context.Context, req *datapb.ImportTaskRequest) (*datapb.ImportTaskResponse, error) {
		if mockCallImportServiceErr {
			return &datapb.ImportTaskResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_Success,
				},
			}, errors.New("mock err")
		}
		return &datapb.ImportTaskResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_Success,
			},
		}, nil
	}
	callMarkSegmentsDropped := func(ctx context.Context, segIDs []typeutil.UniqueID) (*commonpb.Status, error) {
		return &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		}, nil
	}

	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.ReportImport(ctx, &rootcoordpb.ImportResult{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("report complete import", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		c.importManager = newImportManager(ctx, mockKv, idAlloc, callImportServiceFn, callMarkSegmentsDropped, nil, nil, nil, nil)
		resp, err := c.ReportImport(ctx, &rootcoordpb.ImportResult{
			TaskId: 100,
			State:  commonpb.ImportState_ImportCompleted,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
		// Change the state back.
		err = c.importManager.setImportTaskState(100, commonpb.ImportState_ImportPending)
		assert.NoError(t, err)
	})

	t.Run("report complete import with task not found", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		c.importManager = newImportManager(ctx, mockKv, idAlloc, callImportServiceFn, callMarkSegmentsDropped, nil, nil, nil, nil)
		resp, err := c.ReportImport(ctx, &rootcoordpb.ImportResult{
			TaskId: 101,
			State:  commonpb.ImportState_ImportCompleted,
		})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("report import started state", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withHealthyCode())
		c.importManager = newImportManager(ctx, mockKv, idAlloc, callImportServiceFn, callMarkSegmentsDropped, nil, nil, nil, nil)
		c.importManager.loadFromTaskStore(true)
		c.importManager.sendOutTasks(ctx)
		resp, err := c.ReportImport(ctx, &rootcoordpb.ImportResult{
			TaskId: 100,
			State:  commonpb.ImportState_ImportStarted,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
		// Change the state back.
		err = c.importManager.setImportTaskState(100, commonpb.ImportState_ImportPending)
		assert.NoError(t, err)
	})

	t.Run("report persisted import", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(
			withHealthyCode(),
			withValidIDAllocator(),
			withMeta(meta),
			withTtSynchronizer(ticker),
			withDataCoord(dc))
		c.broker = newServerBroker(c)
		c.importManager = newImportManager(ctx, mockKv, idAlloc, callImportServiceFn, callMarkSegmentsDropped, nil, nil, nil, nil)
		c.importManager.loadFromTaskStore(true)
		c.importManager.sendOutTasks(ctx)

		resp, err := c.ReportImport(ctx, &rootcoordpb.ImportResult{
			TaskId: 100,
			State:  commonpb.ImportState_ImportPersisted,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
		// Change the state back.
		err = c.importManager.setImportTaskState(100, commonpb.ImportState_ImportPending)
		assert.NoError(t, err)
	})
}

func TestCore_Rbac(t *testing.T) {
	ctx := context.Background()
	c := &Core{
		ctx: ctx,
	}

	// not healthy.
	c.stateCode.Store(commonpb.StateCode_Abnormal)

	{
		resp, err := c.CreateRole(ctx, &milvuspb.CreateRoleRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.ErrorCode)
	}

	{
		resp, err := c.DropRole(ctx, &milvuspb.DropRoleRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.ErrorCode)
	}

	{
		resp, err := c.OperateUserRole(ctx, &milvuspb.OperateUserRoleRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.ErrorCode)
	}

	{
		resp, err := c.SelectRole(ctx, &milvuspb.SelectRoleRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	}

	{
		resp, err := c.SelectUser(ctx, &milvuspb.SelectUserRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	}

	{
		resp, err := c.OperatePrivilege(ctx, &milvuspb.OperatePrivilegeRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.ErrorCode)
	}

	{
		resp, err := c.SelectGrant(ctx, &milvuspb.SelectGrantRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	}

	{
		resp, err := c.ListPolicy(ctx, &internalpb.ListPolicyRequest{})
		assert.NotNil(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	}
}

func TestCore_sendMinDdlTsAsTt(t *testing.T) {
	ticker := newRocksMqTtSynchronizer()
	ddlManager := newMockDdlTsLockManager()
	ddlManager.GetMinDdlTsFunc = func() Timestamp {
		return 100
	}
	sched := newMockScheduler()
	sched.GetMinDdlTsFunc = func() Timestamp {
		return 100
	}
	c := newTestCore(
		withTtSynchronizer(ticker),
		withDdlTsLockManager(ddlManager),
		withScheduler(sched))
	c.sendMinDdlTsAsTt() // no session.
	ticker.addSession(&sessionutil.Session{ServerID: TestRootCoordID})
	c.sendMinDdlTsAsTt()
	sched.GetMinDdlTsFunc = func() Timestamp {
		return typeutil.ZeroTimestamp
	}
	c.sendMinDdlTsAsTt() // zero ts
	sched.GetMinDdlTsFunc = func() Timestamp {
		return typeutil.MaxTimestamp
	}
	ddlManager.GetMinDdlTsFunc = func() Timestamp {
		return typeutil.MaxTimestamp
	}
	c.sendMinDdlTsAsTt()
}

func TestCore_startTimeTickLoop(t *testing.T) {
	ticker := newRocksMqTtSynchronizer()
	ticker.addSession(&sessionutil.Session{ServerID: TestRootCoordID})
	ddlManager := newMockDdlTsLockManager()
	ddlManager.GetMinDdlTsFunc = func() Timestamp {
		return 100
	}
	sched := newMockScheduler()
	sched.GetMinDdlTsFunc = func() Timestamp {
		return 100
	}
	c := newTestCore(
		withTtSynchronizer(ticker),
		withDdlTsLockManager(ddlManager),
		withScheduler(sched))
	ctx, cancel := context.WithCancel(context.Background())
	c.ctx = ctx
	Params.ProxyCfg.TimeTickInterval = time.Millisecond
	c.wg.Add(1)
	go c.startTimeTickLoop()

	time.Sleep(time.Millisecond * 4)
	cancel()
	c.wg.Wait()
}

// make sure the main functions work well when EnableActiveStandby=true
func TestRootcoord_EnableActiveStandby(t *testing.T) {
	Params.Init()
	Params.RootCoordCfg.EnableActiveStandby = true
	randVal := rand.Int()
	Params.CommonCfg.RootCoordTimeTick = fmt.Sprintf("rootcoord-time-tick-%d", randVal)
	Params.CommonCfg.RootCoordStatistics = fmt.Sprintf("rootcoord-statistics-%d", randVal)
	Params.EtcdCfg.MetaRootPath = fmt.Sprintf("/%d/%s", randVal, Params.EtcdCfg.MetaRootPath)
	Params.EtcdCfg.KvRootPath = fmt.Sprintf("/%d/%s", randVal, Params.EtcdCfg.KvRootPath)
	Params.CommonCfg.RootCoordSubName = fmt.Sprintf("subname-%d", randVal)
	Params.CommonCfg.RootCoordDml = fmt.Sprintf("rootcoord-dml-test-%d", randVal)
	Params.CommonCfg.RootCoordDelta = fmt.Sprintf("rootcoord-delta-test-%d", randVal)

	ctx := context.Background()
	coreFactory := dependency.NewDefaultFactory(true)
	etcdCli, err := etcd.GetEtcdClient(&Params.EtcdCfg)
	assert.NoError(t, err)
	defer etcdCli.Close()
	core, err := NewCore(ctx, coreFactory)
	core.etcdCli = etcdCli
	assert.NoError(t, err)
	err = core.Init()
	assert.NoError(t, err)
	err = core.Start()
	assert.NoError(t, err)
	core.session.TriggerKill = false
	err = core.Register()
	assert.NoError(t, err)
	resp, err := core.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DescribeCollection,
			MsgID:     0,
			Timestamp: 0,
			SourceID:  Params.ProxyCfg.GetNodeID(),
		},
		CollectionName: "unexist"})
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.GetStatus().GetErrorCode())
	err = core.Stop()
	assert.NoError(t, err)
}

func TestRootCoord_AlterCollection(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.AlterCollection(ctx, &milvuspb.AlterCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("add task failed", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

		ctx := context.Background()
		resp, err := c.AlterCollection(ctx, &milvuspb.AlterCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("execute task failed", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withTaskFailScheduler())

		ctx := context.Background()
		resp, err := c.AlterCollection(ctx, &milvuspb.AlterCollectionRequest{})
		assert.NoError(t, err)
		assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})

	t.Run("run ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.AlterCollection(ctx, &milvuspb.AlterCollectionRequest{})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
	})
}

func TestRootCoord_CheckHealth(t *testing.T) {
	t.Run("not healthy", func(t *testing.T) {
		ctx := context.Background()
		c := newTestCore(withAbnormalCode())
		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
		assert.NoError(t, err)
		assert.Equal(t, false, resp.IsHealthy)
		assert.NotEmpty(t, resp.Reasons)
	})

	t.Run("proxy health check is ok", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidProxyManager())

		ctx := context.Background()
		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
		assert.NoError(t, err)
		assert.Equal(t, true, resp.IsHealthy)
		assert.Empty(t, resp.Reasons)
	})

	t.Run("proxy health check is fail", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidProxyManager())

		ctx := context.Background()
		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
		assert.NoError(t, err)
		assert.Equal(t, false, resp.IsHealthy)
		assert.NotEmpty(t, resp.Reasons)
	})
}

func TestCore_Stop(t *testing.T) {
	t.Run("abnormal stop before component is ready", func(t *testing.T) {
		c := &Core{}
		err := c.Stop()
		assert.NoError(t, err)
		code, ok := c.stateCode.Load().(commonpb.StateCode)
		assert.True(t, ok)
		assert.Equal(t, commonpb.StateCode_Abnormal, code)
	})

	t.Run("normal case", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())
		c.ctx, c.cancel = context.WithCancel(context.Background())
		err := c.Stop()
		assert.NoError(t, err)
		code, ok := c.stateCode.Load().(commonpb.StateCode)
		assert.True(t, ok)
		assert.Equal(t, commonpb.StateCode_Abnormal, code)
	})
}