milvus/internal/rootcoord/root_coord_test.go

package rootcoord

import (
	"context"
	"math/rand"
	"testing"
	"time"

	"github.com/milvus-io/milvus/internal/proto/proxypb"

	"github.com/milvus-io/milvus/internal/util/metricsinfo"
	"github.com/milvus-io/milvus/internal/util/sessionutil"

	"github.com/milvus-io/milvus/internal/util/funcutil"

	"github.com/milvus-io/milvus/internal/proto/internalpb"

	"github.com/milvus-io/milvus/internal/allocator"

	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"

	"github.com/milvus-io/milvus/api/commonpb"
	"github.com/stretchr/testify/assert"

	"github.com/milvus-io/milvus/api/milvuspb"
)

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

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

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

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

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

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

		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) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

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

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

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

		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) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

		ctx := context.Background()
		resp, err := c.ShowCollections(ctx, &milvuspb.ShowCollectionsRequest{})
		assert.NoError(t, err)
		assert.Equal(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("failed to add task", func(t *testing.T) {
		c := newTestCore(withHealthyCode(),
			withInvalidScheduler())

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

		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) {
		c := newTestCore(withHealthyCode(),
			withValidScheduler())

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

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

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

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) {

}

func TestCore_GetImportState(t *testing.T) {

}

func TestCore_ListImportTasks(t *testing.T) {

}

func TestCore_ReportImport(t *testing.T) {

}

func TestCore_CountCompleteIndex(t *testing.T) {

}

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

	// not healthy.
	c.stateCode.Store(internalpb.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
	}
	c := newTestCore(
		withTtSynchronizer(ticker),
		withDdlTsLockManager(ddlManager))
	c.sendMinDdlTsAsTt() // no session.
	ticker.addSession(&sessionutil.Session{ServerID: TestRootCoordID})
	c.sendMinDdlTsAsTt()
}

func TestCore_startTimeTickLoop(t *testing.T) {
	ticker := newRocksMqTtSynchronizer()
	ticker.addSession(&sessionutil.Session{ServerID: TestRootCoordID})
	ddlManager := newMockDdlTsLockManager()
	ddlManager.GetMinDdlTsFunc = func() Timestamp {
		return 100
	}
	c := newTestCore(
		withTtSynchronizer(ticker),
		withDdlTsLockManager(ddlManager))
	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()
}