meta_test.go
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package tsdb_test
import (
"bytes"
"fmt"
"testing"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/tsdb"
"github.com/influxdata/influxdb/tsdb/index/inmem"
)
// Ensure tags can be marshaled into a byte slice.
func TestMarshalTags(t *testing.T) {
for i, tt := range []struct {
tags map[string]string
result []byte
}{
{
tags: nil,
result: nil,
},
{
tags: map[string]string{"foo": "bar"},
result: []byte(`foo|bar`),
},
{
tags: map[string]string{"foo": "bar", "baz": "battttt"},
result: []byte(`baz|foo|battttt|bar`),
},
{
tags: map[string]string{"baz": "battttt", "foo": "bar"},
result: []byte(`baz|foo|battttt|bar`),
},
} {
result := tsdb.MarshalTags(tt.tags)
if !bytes.Equal(result, tt.result) {
t.Fatalf("%d. unexpected result: exp=%s, got=%s", i, tt.result, result)
}
}
}
func BenchmarkMarshalTags_KeyN1(b *testing.B) { benchmarkMarshalTags(b, 1) }
func BenchmarkMarshalTags_KeyN3(b *testing.B) { benchmarkMarshalTags(b, 3) }
func BenchmarkMarshalTags_KeyN5(b *testing.B) { benchmarkMarshalTags(b, 5) }
func BenchmarkMarshalTags_KeyN10(b *testing.B) { benchmarkMarshalTags(b, 10) }
func benchmarkMarshalTags(b *testing.B, keyN int) {
const keySize, valueSize = 8, 15
// Generate tag map.
tags := make(map[string]string)
for i := 0; i < keyN; i++ {
tags[fmt.Sprintf("%0*d", keySize, i)] = fmt.Sprintf("%0*d", valueSize, i)
}
// Unmarshal map into byte slice.
b.ReportAllocs()
for i := 0; i < b.N; i++ {
tsdb.MarshalTags(tags)
}
}
type TestSeries struct {
Measurement string
Series *inmem.Series
}
func genTestSeries(mCnt, tCnt, vCnt int) []*TestSeries {
measurements := genStrList("measurement", mCnt)
tagSets := NewTagSetGenerator(tCnt, vCnt).AllSets()
series := []*TestSeries{}
for _, m := range measurements {
for _, ts := range tagSets {
series = append(series, &TestSeries{
Measurement: m,
Series: inmem.NewSeries([]byte(fmt.Sprintf("%s:%s", m, string(tsdb.MarshalTags(ts)))), models.NewTags(ts)),
})
}
}
return series
}
type TagValGenerator struct {
Key string
Vals []string
idx int
}
func NewTagValGenerator(tagKey string, nVals int) *TagValGenerator {
tvg := &TagValGenerator{Key: tagKey}
for i := 0; i < nVals; i++ {
tvg.Vals = append(tvg.Vals, fmt.Sprintf("tagValue%d", i))
}
return tvg
}
func (tvg *TagValGenerator) First() string {
tvg.idx = 0
return tvg.Curr()
}
func (tvg *TagValGenerator) Curr() string {
return tvg.Vals[tvg.idx]
}
func (tvg *TagValGenerator) Next() string {
tvg.idx++
if tvg.idx >= len(tvg.Vals) {
tvg.idx--
return ""
}
return tvg.Curr()
}
type TagSet map[string]string
type TagSetGenerator struct {
TagVals []*TagValGenerator
}
func NewTagSetGenerator(nSets int, nTagVals ...int) *TagSetGenerator {
tsg := &TagSetGenerator{}
for i := 0; i < nSets; i++ {
nVals := nTagVals[0]
if i < len(nTagVals) {
nVals = nTagVals[i]
}
tagKey := fmt.Sprintf("tagKey%d", i)
tsg.TagVals = append(tsg.TagVals, NewTagValGenerator(tagKey, nVals))
}
return tsg
}
func (tsg *TagSetGenerator) First() TagSet {
for _, tsv := range tsg.TagVals {
tsv.First()
}
return tsg.Curr()
}
func (tsg *TagSetGenerator) Curr() TagSet {
ts := TagSet{}
for _, tvg := range tsg.TagVals {
ts[tvg.Key] = tvg.Curr()
}
return ts
}
func (tsg *TagSetGenerator) Next() TagSet {
val := ""
for _, tsv := range tsg.TagVals {
if val = tsv.Next(); val != "" {
break
} else {
tsv.First()
}
}
if val == "" {
return nil
}
return tsg.Curr()
}
func (tsg *TagSetGenerator) AllSets() []TagSet {
allSets := []TagSet{}
for ts := tsg.First(); ts != nil; ts = tsg.Next() {
allSets = append(allSets, ts)
}
return allSets
}
func genStrList(prefix string, n int) []string {
lst := make([]string, 0, n)
for i := 0; i < n; i++ {
lst = append(lst, fmt.Sprintf("%s%d", prefix, i))
}
return lst
}