mirror of
https://github.com/prometheus/prometheus
synced 2024-12-24 23:42:32 +00:00
856 lines
21 KiB
Go
856 lines
21 KiB
Go
// Copyright 2019 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package labels
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
"gopkg.in/yaml.v2"
|
|
)
|
|
|
|
func TestLabels_String(t *testing.T) {
|
|
cases := []struct {
|
|
lables Labels
|
|
expected string
|
|
}{
|
|
{
|
|
lables: FromStrings("t1", "t1", "t2", "t2"),
|
|
expected: "{t1=\"t1\", t2=\"t2\"}",
|
|
},
|
|
{
|
|
lables: Labels{},
|
|
expected: "{}",
|
|
},
|
|
}
|
|
for _, c := range cases {
|
|
str := c.lables.String()
|
|
require.Equal(t, c.expected, str)
|
|
}
|
|
}
|
|
|
|
func TestLabels_MatchLabels(t *testing.T) {
|
|
labels := FromStrings(
|
|
"__name__", "ALERTS",
|
|
"alertname", "HTTPRequestRateLow",
|
|
"alertstate", "pending",
|
|
"instance", "0",
|
|
"job", "app-server",
|
|
"severity", "critical")
|
|
|
|
tests := []struct {
|
|
providedNames []string
|
|
on bool
|
|
expected Labels
|
|
}{
|
|
// on = true, explicitly including metric name in matching.
|
|
{
|
|
providedNames: []string{
|
|
"__name__",
|
|
"alertname",
|
|
"alertstate",
|
|
"instance",
|
|
},
|
|
on: true,
|
|
expected: FromStrings(
|
|
"__name__", "ALERTS",
|
|
"alertname", "HTTPRequestRateLow",
|
|
"alertstate", "pending",
|
|
"instance", "0"),
|
|
},
|
|
// on = false, explicitly excluding metric name from matching.
|
|
{
|
|
providedNames: []string{
|
|
"__name__",
|
|
"alertname",
|
|
"alertstate",
|
|
"instance",
|
|
},
|
|
on: false,
|
|
expected: FromStrings(
|
|
"job", "app-server",
|
|
"severity", "critical"),
|
|
},
|
|
// on = true, explicitly excluding metric name from matching.
|
|
{
|
|
providedNames: []string{
|
|
"alertname",
|
|
"alertstate",
|
|
"instance",
|
|
},
|
|
on: true,
|
|
expected: FromStrings(
|
|
"alertname", "HTTPRequestRateLow",
|
|
"alertstate", "pending",
|
|
"instance", "0"),
|
|
},
|
|
// on = false, implicitly excluding metric name from matching.
|
|
{
|
|
providedNames: []string{
|
|
"alertname",
|
|
"alertstate",
|
|
"instance",
|
|
},
|
|
on: false,
|
|
expected: FromStrings(
|
|
"job", "app-server",
|
|
"severity", "critical"),
|
|
},
|
|
}
|
|
|
|
for i, test := range tests {
|
|
got := labels.MatchLabels(test.on, test.providedNames...)
|
|
require.Equal(t, test.expected, got, "unexpected labelset for test case %d", i)
|
|
}
|
|
}
|
|
|
|
func TestLabels_HasDuplicateLabelNames(t *testing.T) {
|
|
cases := []struct {
|
|
Input Labels
|
|
Duplicate bool
|
|
LabelName string
|
|
}{
|
|
{
|
|
Input: FromMap(map[string]string{"__name__": "up", "hostname": "localhost"}),
|
|
Duplicate: false,
|
|
}, {
|
|
Input: FromStrings("__name__", "up", "hostname", "localhost", "hostname", "127.0.0.1"),
|
|
Duplicate: true,
|
|
LabelName: "hostname",
|
|
},
|
|
}
|
|
|
|
for i, c := range cases {
|
|
l, d := c.Input.HasDuplicateLabelNames()
|
|
require.Equal(t, c.Duplicate, d, "test %d: incorrect duplicate bool", i)
|
|
require.Equal(t, c.LabelName, l, "test %d: incorrect label name", i)
|
|
}
|
|
}
|
|
|
|
func TestLabels_WithoutEmpty(t *testing.T) {
|
|
for _, test := range []struct {
|
|
input Labels
|
|
expected Labels
|
|
}{
|
|
{
|
|
input: FromStrings(
|
|
"foo", "",
|
|
"bar", ""),
|
|
expected: EmptyLabels(),
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"foo", "",
|
|
"bar", "",
|
|
"baz", ""),
|
|
expected: EmptyLabels(),
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check"),
|
|
expected: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check"),
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"bar", "",
|
|
"job", "check"),
|
|
expected: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check"),
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test",
|
|
"foo", "",
|
|
"hostname", "localhost",
|
|
"bar", "",
|
|
"job", "check"),
|
|
expected: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check"),
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test",
|
|
"foo", "",
|
|
"baz", "",
|
|
"hostname", "localhost",
|
|
"bar", "",
|
|
"job", "check"),
|
|
expected: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check"),
|
|
},
|
|
} {
|
|
t.Run("", func(t *testing.T) {
|
|
require.Equal(t, test.expected, test.input.WithoutEmpty())
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestLabels_IsValid(t *testing.T) {
|
|
for _, test := range []struct {
|
|
input Labels
|
|
expected bool
|
|
}{
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test",
|
|
"hostname", "localhost",
|
|
"job", "check",
|
|
),
|
|
expected: true,
|
|
},
|
|
{
|
|
input: FromStrings(
|
|
"__name__", "test:ms",
|
|
"hostname_123", "localhost",
|
|
"_job", "check",
|
|
),
|
|
expected: true,
|
|
},
|
|
{
|
|
input: FromStrings("__name__", "test-ms"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("__name__", "0zz"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("abc:xyz", "invalid"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("123abc", "invalid"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("中文abc", "invalid"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("invalid", "aa\xe2"),
|
|
expected: false,
|
|
},
|
|
{
|
|
input: FromStrings("invalid", "\xF7\xBF\xBF\xBF"),
|
|
expected: false,
|
|
},
|
|
} {
|
|
t.Run("", func(t *testing.T) {
|
|
require.Equal(t, test.expected, test.input.IsValid())
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestLabels_Equal(t *testing.T) {
|
|
labels := FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222")
|
|
|
|
tests := []struct {
|
|
compared Labels
|
|
expected bool
|
|
}{
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222",
|
|
"ccc", "333"),
|
|
expected: false,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bar", "222"),
|
|
expected: false,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "233"),
|
|
expected: false,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222"),
|
|
expected: true,
|
|
},
|
|
}
|
|
|
|
for i, test := range tests {
|
|
got := Equal(labels, test.compared)
|
|
require.Equal(t, test.expected, got, "unexpected comparison result for test case %d", i)
|
|
}
|
|
}
|
|
|
|
func TestLabels_FromStrings(t *testing.T) {
|
|
labels := FromStrings("aaa", "111", "bbb", "222")
|
|
x := 0
|
|
labels.Range(func(l Label) {
|
|
switch x {
|
|
case 0:
|
|
require.Equal(t, Label{Name: "aaa", Value: "111"}, l, "unexpected value")
|
|
case 1:
|
|
require.Equal(t, Label{Name: "bbb", Value: "222"}, l, "unexpected value")
|
|
default:
|
|
t.Fatalf("unexpected labelset value %d: %v", x, l)
|
|
}
|
|
x++
|
|
})
|
|
|
|
require.Panics(t, func() { FromStrings("aaa", "111", "bbb") }) //nolint:staticcheck // Ignore SA5012, error is intentional test.
|
|
}
|
|
|
|
func TestLabels_Compare(t *testing.T) {
|
|
labels := FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222")
|
|
|
|
tests := []struct {
|
|
compared Labels
|
|
expected int
|
|
}{
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "110",
|
|
"bbb", "222"),
|
|
expected: 1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "233"),
|
|
expected: -1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bar", "222"),
|
|
expected: 1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbc", "222"),
|
|
expected: -1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bb", "222"),
|
|
expected: 1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbbb", "222"),
|
|
expected: -1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111"),
|
|
expected: 1,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222",
|
|
"ccc", "333",
|
|
"ddd", "444"),
|
|
expected: -2,
|
|
},
|
|
{
|
|
compared: FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222"),
|
|
expected: 0,
|
|
},
|
|
{
|
|
compared: EmptyLabels(),
|
|
expected: 1,
|
|
},
|
|
}
|
|
|
|
sign := func(a int) int {
|
|
switch {
|
|
case a < 0:
|
|
return -1
|
|
case a > 0:
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
for i, test := range tests {
|
|
got := Compare(labels, test.compared)
|
|
require.Equal(t, sign(test.expected), sign(got), "unexpected comparison result for test case %d", i)
|
|
got = Compare(test.compared, labels)
|
|
require.Equal(t, -sign(test.expected), sign(got), "unexpected comparison result for reverse test case %d", i)
|
|
}
|
|
}
|
|
|
|
func TestLabels_Has(t *testing.T) {
|
|
tests := []struct {
|
|
input string
|
|
expected bool
|
|
}{
|
|
{
|
|
input: "foo",
|
|
expected: false,
|
|
},
|
|
{
|
|
input: "aaa",
|
|
expected: true,
|
|
},
|
|
}
|
|
|
|
labelsSet := FromStrings(
|
|
"aaa", "111",
|
|
"bbb", "222")
|
|
|
|
for i, test := range tests {
|
|
got := labelsSet.Has(test.input)
|
|
require.Equal(t, test.expected, got, "unexpected comparison result for test case %d", i)
|
|
}
|
|
}
|
|
|
|
func TestLabels_Get(t *testing.T) {
|
|
require.Equal(t, "", FromStrings("aaa", "111", "bbb", "222").Get("foo"))
|
|
require.Equal(t, "111", FromStrings("aaaa", "111", "bbb", "222").Get("aaaa"))
|
|
require.Equal(t, "222", FromStrings("aaaa", "111", "bbb", "222").Get("bbb"))
|
|
}
|
|
|
|
// BenchmarkLabels_Get was written to check whether a binary search can improve the performance vs the linear search implementation
|
|
// The results have shown that binary search would only be better when searching last labels in scenarios with more than 10 labels.
|
|
// In the following list, `old` is the linear search while `new` is the binary search implementation (without calling sort.Search, which performs even worse here)
|
|
//
|
|
// name old time/op new time/op delta
|
|
// Labels_Get/with_5_labels/get_first_label 5.12ns ± 0% 14.24ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_5_labels/get_middle_label 13.5ns ± 0% 18.5ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_5_labels/get_last_label 21.9ns ± 0% 18.9ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_10_labels/get_first_label 5.11ns ± 0% 19.47ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_10_labels/get_middle_label 26.2ns ± 0% 19.3ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_10_labels/get_last_label 42.8ns ± 0% 23.4ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_30_labels/get_first_label 5.10ns ± 0% 24.63ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_30_labels/get_middle_label 75.8ns ± 0% 29.7ns ± 0% ~ (p=1.000 n=1+1)
|
|
// Labels_Get/with_30_labels/get_last_label 169ns ± 0% 29ns ± 0% ~ (p=1.000 n=1+1)
|
|
func BenchmarkLabels_Get(b *testing.B) {
|
|
maxLabels := 30
|
|
allLabels := make([]Label, maxLabels)
|
|
for i := 0; i < maxLabels; i++ {
|
|
allLabels[i] = Label{Name: strings.Repeat(string('a'+byte(i)), 5+(i%5))}
|
|
}
|
|
for _, size := range []int{5, 10, maxLabels} {
|
|
b.Run(fmt.Sprintf("with %d labels", size), func(b *testing.B) {
|
|
labels := New(allLabels[:size]...)
|
|
for _, scenario := range []struct {
|
|
desc, label string
|
|
}{
|
|
{"first label", allLabels[0].Name},
|
|
{"middle label", allLabels[size/2].Name},
|
|
{"last label", allLabels[size-1].Name},
|
|
{"not-found label", "benchmark"},
|
|
} {
|
|
b.Run(scenario.desc, func(b *testing.B) {
|
|
b.Run("get", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
_ = labels.Get(scenario.label)
|
|
}
|
|
})
|
|
b.Run("has", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
_ = labels.Has(scenario.label)
|
|
}
|
|
})
|
|
})
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
var comparisonBenchmarkScenarios = []struct {
|
|
desc string
|
|
base, other Labels
|
|
}{
|
|
{
|
|
"equal",
|
|
FromStrings("a_label_name", "a_label_value", "another_label_name", "another_label_value"),
|
|
FromStrings("a_label_name", "a_label_value", "another_label_name", "another_label_value"),
|
|
},
|
|
{
|
|
"not equal",
|
|
FromStrings("a_label_name", "a_label_value", "another_label_name", "another_label_value"),
|
|
FromStrings("a_label_name", "a_label_value", "another_label_name", "a_different_label_value"),
|
|
},
|
|
{
|
|
"different sizes",
|
|
FromStrings("a_label_name", "a_label_value", "another_label_name", "another_label_value"),
|
|
FromStrings("a_label_name", "a_label_value"),
|
|
},
|
|
{
|
|
"lots",
|
|
FromStrings("aaa", "bbb", "ccc", "ddd", "eee", "fff", "ggg", "hhh", "iii", "jjj", "kkk", "lll", "mmm", "nnn", "ooo", "ppp", "qqq", "rrz"),
|
|
FromStrings("aaa", "bbb", "ccc", "ddd", "eee", "fff", "ggg", "hhh", "iii", "jjj", "kkk", "lll", "mmm", "nnn", "ooo", "ppp", "qqq", "rrr"),
|
|
},
|
|
}
|
|
|
|
func BenchmarkLabels_Equals(b *testing.B) {
|
|
for _, scenario := range comparisonBenchmarkScenarios {
|
|
b.Run(scenario.desc, func(b *testing.B) {
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
_ = Equal(scenario.base, scenario.other)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func BenchmarkLabels_Compare(b *testing.B) {
|
|
for _, scenario := range comparisonBenchmarkScenarios {
|
|
b.Run(scenario.desc, func(b *testing.B) {
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
_ = Compare(scenario.base, scenario.other)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestLabels_Copy(t *testing.T) {
|
|
require.Equal(t, FromStrings("aaa", "111", "bbb", "222"), FromStrings("aaa", "111", "bbb", "222").Copy())
|
|
}
|
|
|
|
func TestLabels_Map(t *testing.T) {
|
|
require.Equal(t, map[string]string{"aaa": "111", "bbb": "222"}, FromStrings("aaa", "111", "bbb", "222").Map())
|
|
}
|
|
|
|
func TestLabels_BytesWithLabels(t *testing.T) {
|
|
require.Equal(t, FromStrings("aaa", "111", "bbb", "222").Bytes(nil), FromStrings("aaa", "111", "bbb", "222", "ccc", "333").BytesWithLabels(nil, "aaa", "bbb"))
|
|
require.Equal(t, FromStrings().Bytes(nil), FromStrings("aaa", "111", "bbb", "222", "ccc", "333").BytesWithLabels(nil))
|
|
}
|
|
|
|
func TestLabels_BytesWithoutLabels(t *testing.T) {
|
|
require.Equal(t, FromStrings("aaa", "111").Bytes(nil), FromStrings("aaa", "111", "bbb", "222", "ccc", "333").BytesWithoutLabels(nil, "bbb", "ccc"))
|
|
require.Equal(t, FromStrings(MetricName, "333", "aaa", "111").Bytes(nil), FromStrings(MetricName, "333", "aaa", "111", "bbb", "222").BytesWithoutLabels(nil, "bbb"))
|
|
require.Equal(t, FromStrings("aaa", "111").Bytes(nil), FromStrings(MetricName, "333", "aaa", "111", "bbb", "222").BytesWithoutLabels(nil, MetricName, "bbb"))
|
|
}
|
|
|
|
func TestBuilder(t *testing.T) {
|
|
for i, tcase := range []struct {
|
|
base Labels
|
|
del []string
|
|
keep []string
|
|
set []Label
|
|
want Labels
|
|
}{
|
|
{
|
|
base: FromStrings("aaa", "111"),
|
|
want: FromStrings("aaa", "111"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
set: []Label{{"aaa", "444"}, {"bbb", "555"}, {"ccc", "666"}},
|
|
want: FromStrings("aaa", "444", "bbb", "555", "ccc", "666"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
del: []string{"bbb"},
|
|
want: FromStrings("aaa", "111", "ccc", "333"),
|
|
},
|
|
{
|
|
set: []Label{{"aaa", "111"}, {"bbb", "222"}, {"ccc", "333"}},
|
|
del: []string{"bbb"},
|
|
want: FromStrings("aaa", "111", "ccc", "333"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111"),
|
|
set: []Label{{"bbb", "222"}},
|
|
want: FromStrings("aaa", "111", "bbb", "222"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111"),
|
|
set: []Label{{"bbb", "222"}, {"bbb", "333"}},
|
|
want: FromStrings("aaa", "111", "bbb", "333"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
del: []string{"bbb"},
|
|
set: []Label{{"ddd", "444"}},
|
|
want: FromStrings("aaa", "111", "ccc", "333", "ddd", "444"),
|
|
},
|
|
{ // Blank value is interpreted as delete.
|
|
base: FromStrings("aaa", "111", "bbb", "", "ccc", "333"),
|
|
want: FromStrings("aaa", "111", "ccc", "333"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
set: []Label{{"bbb", ""}},
|
|
want: FromStrings("aaa", "111", "ccc", "333"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
keep: []string{"bbb"},
|
|
want: FromStrings("bbb", "222"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
keep: []string{"aaa", "ccc"},
|
|
want: FromStrings("aaa", "111", "ccc", "333"),
|
|
},
|
|
{
|
|
base: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
del: []string{"bbb"},
|
|
set: []Label{{"ddd", "444"}},
|
|
keep: []string{"aaa", "ddd"},
|
|
want: FromStrings("aaa", "111", "ddd", "444"),
|
|
},
|
|
} {
|
|
t.Run(fmt.Sprint(i), func(t *testing.T) {
|
|
b := NewBuilder(tcase.base)
|
|
for _, lbl := range tcase.set {
|
|
b.Set(lbl.Name, lbl.Value)
|
|
}
|
|
if len(tcase.keep) > 0 {
|
|
b.Keep(tcase.keep...)
|
|
}
|
|
b.Del(tcase.del...)
|
|
require.Equal(t, tcase.want, b.Labels())
|
|
|
|
// Check what happens when we call Range and mutate the builder.
|
|
b.Range(func(l Label) {
|
|
if l.Name == "aaa" || l.Name == "bbb" {
|
|
b.Del(l.Name)
|
|
}
|
|
})
|
|
require.Equal(t, tcase.want.BytesWithoutLabels(nil, "aaa", "bbb"), b.Labels().Bytes(nil))
|
|
})
|
|
}
|
|
t.Run("set_after_del", func(t *testing.T) {
|
|
b := NewBuilder(FromStrings("aaa", "111"))
|
|
b.Del("bbb")
|
|
b.Set("bbb", "222")
|
|
require.Equal(t, FromStrings("aaa", "111", "bbb", "222"), b.Labels())
|
|
require.Equal(t, "222", b.Get("bbb"))
|
|
})
|
|
}
|
|
|
|
func TestScratchBuilder(t *testing.T) {
|
|
for i, tcase := range []struct {
|
|
add []Label
|
|
want Labels
|
|
}{
|
|
{
|
|
add: []Label{},
|
|
want: EmptyLabels(),
|
|
},
|
|
{
|
|
add: []Label{{"aaa", "111"}},
|
|
want: FromStrings("aaa", "111"),
|
|
},
|
|
{
|
|
add: []Label{{"aaa", "111"}, {"bbb", "222"}, {"ccc", "333"}},
|
|
want: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
},
|
|
{
|
|
add: []Label{{"bbb", "222"}, {"aaa", "111"}, {"ccc", "333"}},
|
|
want: FromStrings("aaa", "111", "bbb", "222", "ccc", "333"),
|
|
},
|
|
{
|
|
add: []Label{{"ddd", "444"}},
|
|
want: FromStrings("ddd", "444"),
|
|
},
|
|
} {
|
|
t.Run(fmt.Sprint(i), func(t *testing.T) {
|
|
b := ScratchBuilder{}
|
|
for _, lbl := range tcase.add {
|
|
b.Add(lbl.Name, lbl.Value)
|
|
}
|
|
b.Sort()
|
|
require.Equal(t, tcase.want, b.Labels())
|
|
b.Assign(tcase.want)
|
|
require.Equal(t, tcase.want, b.Labels())
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestLabels_Hash(t *testing.T) {
|
|
lbls := FromStrings("foo", "bar", "baz", "qux")
|
|
require.Equal(t, lbls.Hash(), lbls.Hash())
|
|
require.NotEqual(t, lbls.Hash(), FromStrings("foo", "bar").Hash(), "different labels match.")
|
|
}
|
|
|
|
var benchmarkLabelsResult uint64
|
|
|
|
func BenchmarkLabels_Hash(b *testing.B) {
|
|
for _, tcase := range []struct {
|
|
name string
|
|
lbls Labels
|
|
}{
|
|
{
|
|
name: "typical labels under 1KB",
|
|
lbls: func() Labels {
|
|
b := NewBuilder(EmptyLabels())
|
|
for i := 0; i < 10; i++ {
|
|
// Label ~20B name, 50B value.
|
|
b.Set(fmt.Sprintf("abcdefghijabcdefghijabcdefghij%d", i), fmt.Sprintf("abcdefghijabcdefghijabcdefghijabcdefghijabcdefghij%d", i))
|
|
}
|
|
return b.Labels()
|
|
}(),
|
|
},
|
|
{
|
|
name: "bigger labels over 1KB",
|
|
lbls: func() Labels {
|
|
b := NewBuilder(EmptyLabels())
|
|
for i := 0; i < 10; i++ {
|
|
// Label ~50B name, 50B value.
|
|
b.Set(fmt.Sprintf("abcdefghijabcdefghijabcdefghijabcdefghijabcdefghij%d", i), fmt.Sprintf("abcdefghijabcdefghijabcdefghijabcdefghijabcdefghij%d", i))
|
|
}
|
|
return b.Labels()
|
|
}(),
|
|
},
|
|
{
|
|
name: "extremely large label value 10MB",
|
|
lbls: func() Labels {
|
|
lbl := &strings.Builder{}
|
|
lbl.Grow(1024 * 1024 * 10) // 10MB.
|
|
word := "abcdefghij"
|
|
for i := 0; i < lbl.Cap()/len(word); i++ {
|
|
_, _ = lbl.WriteString(word)
|
|
}
|
|
return FromStrings("__name__", lbl.String())
|
|
}(),
|
|
},
|
|
} {
|
|
b.Run(tcase.name, func(b *testing.B) {
|
|
var h uint64
|
|
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
h = tcase.lbls.Hash()
|
|
}
|
|
benchmarkLabelsResult = h
|
|
})
|
|
}
|
|
}
|
|
|
|
func BenchmarkBuilder(b *testing.B) {
|
|
m := []Label{
|
|
{"job", "node"},
|
|
{"instance", "123.123.1.211:9090"},
|
|
{"path", "/api/v1/namespaces/<namespace>/deployments/<name>"},
|
|
{"method", "GET"},
|
|
{"namespace", "system"},
|
|
{"status", "500"},
|
|
{"prometheus", "prometheus-core-1"},
|
|
{"datacenter", "eu-west-1"},
|
|
{"pod_name", "abcdef-99999-defee"},
|
|
}
|
|
|
|
var l Labels
|
|
builder := NewBuilder(EmptyLabels())
|
|
for i := 0; i < b.N; i++ {
|
|
builder.Reset(EmptyLabels())
|
|
for _, l := range m {
|
|
builder.Set(l.Name, l.Value)
|
|
}
|
|
l = builder.Labels()
|
|
}
|
|
require.Equal(b, 9, l.Len())
|
|
}
|
|
|
|
func BenchmarkLabels_Copy(b *testing.B) {
|
|
m := map[string]string{
|
|
"job": "node",
|
|
"instance": "123.123.1.211:9090",
|
|
"path": "/api/v1/namespaces/<namespace>/deployments/<name>",
|
|
"method": "GET",
|
|
"namespace": "system",
|
|
"status": "500",
|
|
"prometheus": "prometheus-core-1",
|
|
"datacenter": "eu-west-1",
|
|
"pod_name": "abcdef-99999-defee",
|
|
}
|
|
l := FromMap(m)
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
l = l.Copy()
|
|
}
|
|
}
|
|
|
|
func TestMarshaling(t *testing.T) {
|
|
lbls := FromStrings("aaa", "111", "bbb", "2222", "ccc", "33333")
|
|
expectedJSON := "{\"aaa\":\"111\",\"bbb\":\"2222\",\"ccc\":\"33333\"}"
|
|
b, err := json.Marshal(lbls)
|
|
require.NoError(t, err)
|
|
require.Equal(t, expectedJSON, string(b))
|
|
|
|
var gotJ Labels
|
|
err = json.Unmarshal(b, &gotJ)
|
|
require.NoError(t, err)
|
|
require.Equal(t, lbls, gotJ)
|
|
|
|
expectedYAML := "aaa: \"111\"\nbbb: \"2222\"\nccc: \"33333\"\n"
|
|
b, err = yaml.Marshal(lbls)
|
|
require.NoError(t, err)
|
|
require.Equal(t, expectedYAML, string(b))
|
|
|
|
var gotY Labels
|
|
err = yaml.Unmarshal(b, &gotY)
|
|
require.NoError(t, err)
|
|
require.Equal(t, lbls, gotY)
|
|
|
|
// Now in a struct with a tag
|
|
type foo struct {
|
|
ALabels Labels `json:"a_labels,omitempty" yaml:"a_labels,omitempty"`
|
|
}
|
|
|
|
f := foo{ALabels: lbls}
|
|
b, err = json.Marshal(f)
|
|
require.NoError(t, err)
|
|
expectedJSONFromStruct := "{\"a_labels\":" + expectedJSON + "}"
|
|
require.Equal(t, expectedJSONFromStruct, string(b))
|
|
|
|
var gotFJ foo
|
|
err = json.Unmarshal(b, &gotFJ)
|
|
require.NoError(t, err)
|
|
require.Equal(t, f, gotFJ)
|
|
|
|
b, err = yaml.Marshal(f)
|
|
require.NoError(t, err)
|
|
expectedYAMLFromStruct := "a_labels:\n aaa: \"111\"\n bbb: \"2222\"\n ccc: \"33333\"\n"
|
|
require.Equal(t, expectedYAMLFromStruct, string(b))
|
|
|
|
var gotFY foo
|
|
err = yaml.Unmarshal(b, &gotFY)
|
|
require.NoError(t, err)
|
|
require.Equal(t, f, gotFY)
|
|
}
|