package reader

import (
	"context"
	"encoding/binary"
	"log"
	"math"
	"testing"

	"github.com/golang/protobuf/proto"
	"github.com/stretchr/testify/assert"

	"github.com/zilliztech/milvus-distributed/internal/msgstream"
	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
	"github.com/zilliztech/milvus-distributed/internal/proto/etcdpb"
	"github.com/zilliztech/milvus-distributed/internal/proto/schemapb"
	"github.com/zilliztech/milvus-distributed/internal/proto/servicepb"
)

//-------------------------------------------------------------------------------------- constructor and destructor
func TestSegment_newSegment(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)
}

func TestSegment_deleteSegment(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	deleteSegment(segment)
}

//-------------------------------------------------------------------------------------- stats functions
func TestSegment_getRowCount(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offset = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offset, int64(0))

	err := segment.segmentInsert(offset, &ids, &timestamps, &records)
	assert.NoError(t, err)

	rowCount := segment.getRowCount()
	assert.Equal(t, int64(N), rowCount)
}

func TestSegment_getDeletedCount(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offsetInsert = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offsetInsert, int64(0))

	var err = segment.segmentInsert(offsetInsert, &ids, &timestamps, &records)
	assert.NoError(t, err)

	var offsetDelete = segment.segmentPreDelete(10)
	assert.GreaterOrEqual(t, offsetDelete, int64(0))

	err = segment.segmentDelete(offsetDelete, &ids, &timestamps)
	assert.NoError(t, err)

	var deletedCount = segment.getDeletedCount()
	// TODO: assert.Equal(t, deletedCount, len(ids))
	assert.Equal(t, deletedCount, int64(0))
}

func TestSegment_getMemSize(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offset = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offset, int64(0))

	err := segment.segmentInsert(offset, &ids, &timestamps, &records)
	assert.NoError(t, err)

	var memSize = segment.getMemSize()
	assert.Equal(t, memSize, int64(2785280))
}

//-------------------------------------------------------------------------------------- dm & search functions
func TestSegment_segmentInsert(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offset = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offset, int64(0))

	err := segment.segmentInsert(offset, &ids, &timestamps, &records)
	assert.NoError(t, err)
}

func TestSegment_segmentDelete(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offsetInsert = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offsetInsert, int64(0))

	var err = segment.segmentInsert(offsetInsert, &ids, &timestamps, &records)
	assert.NoError(t, err)

	var offsetDelete = segment.segmentPreDelete(10)
	assert.GreaterOrEqual(t, offsetDelete, int64(0))

	err = segment.segmentDelete(offsetDelete, &ids, &timestamps)
	assert.NoError(t, err)
}

func TestSegment_segmentSearch(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offset = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offset, int64(0))

	err := segment.segmentInsert(offset, &ids, &timestamps, &records)
	assert.NoError(t, err)

	dslString := "{\"bool\": { \n\"vector\": {\n \"vec\": {\n \"metric_type\": \"L2\", \n \"params\": {\n \"nprobe\": 10 \n},\n \"query\": \"$0\",\"topk\": 10 \n } \n } \n } \n }"

	pulsarURL := "pulsar://localhost:6650"
	const receiveBufSize = 1024
	searchProducerChannels := []string{"search"}
	searchStream := msgstream.NewPulsarMsgStream(ctx, receiveBufSize)
	searchStream.SetPulsarCient(pulsarURL)
	searchStream.CreatePulsarProducers(searchProducerChannels)

	var searchRawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		searchRawData = append(searchRawData, buf...)
	}
	placeholderValue := servicepb.PlaceholderValue{
		Tag:    "$0",
		Type:   servicepb.PlaceholderType_VECTOR_FLOAT,
		Values: [][]byte{searchRawData},
	}

	placeholderGroup := servicepb.PlaceholderGroup{
		Placeholders: []*servicepb.PlaceholderValue{&placeholderValue},
	}

	placeHolderGroupBlob, err := proto.Marshal(&placeholderGroup)
	if err != nil {
		log.Print("marshal placeholderGroup failed")
	}

	searchTimestamp := Timestamp(1020)
	cPlan := CreatePlan(*collection, dslString)
	topK := cPlan.GetTopK()
	cPlaceholderGroup := ParserPlaceholderGroup(cPlan, placeHolderGroupBlob)
	placeholderGroups := make([]*PlaceholderGroup, 0)
	placeholderGroups = append(placeholderGroups, cPlaceholderGroup)

	var numQueries int64 = 0
	for _, pg := range placeholderGroups {
		numQueries += pg.GetNumOfQuery()
	}

	_, err = segment.segmentSearch(cPlan, placeholderGroups, []Timestamp{searchTimestamp}, numQueries, topK)
	assert.NoError(t, err)
}

//-------------------------------------------------------------------------------------- preDm functions
func TestSegment_segmentPreInsert(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offset = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offset, int64(0))
}

func TestSegment_segmentPreDelete(t *testing.T) {
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIDs:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	collection := newCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))

	segmentID := UniqueID(0)
	segment := newSegment(collection, segmentID)
	assert.Equal(t, segmentID, segment.segmentID)

	ids := []int64{1, 2, 3}
	timestamps := []uint64{0, 0, 0}

	const DIM = 16
	const N = 3
	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	var offsetInsert = segment.segmentPreInsert(N)
	assert.GreaterOrEqual(t, offsetInsert, int64(0))

	var err = segment.segmentInsert(offsetInsert, &ids, &timestamps, &records)
	assert.NoError(t, err)

	var offsetDelete = segment.segmentPreDelete(10)
	assert.GreaterOrEqual(t, offsetDelete, int64(0))
}
