114 lines
3.1 KiB
Go
114 lines
3.1 KiB
Go
// Copyright (c) 2013, Prometheus Team
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package prometheus
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import (
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"runtime"
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"testing"
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)
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func testLabelsToSignature(t tester) {
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var scenarios = []struct {
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in map[string]string
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out uint64
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}{
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{
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in: map[string]string{},
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out: 14695981039346656037,
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},
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{
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in: map[string]string{"name": "garland, briggs", "fear": "love is not enough"},
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out: 12256296522964301276,
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},
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}
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for i, scenario := range scenarios {
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actual := labelsToSignature(scenario.in)
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if actual != scenario.out {
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t.Errorf("%d. expected %d, got %d", i, scenario.out, actual)
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}
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}
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}
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func TestLabelToSignature(t *testing.T) {
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testLabelsToSignature(t)
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}
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func TestEmptyLabelSignature(t *testing.T) {
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input := []map[string]string{nil, {}}
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var ms runtime.MemStats
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runtime.ReadMemStats(&ms)
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alloc := ms.Alloc
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for _, labels := range input {
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labelsToSignature(labels)
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}
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runtime.ReadMemStats(&ms)
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if got := ms.Alloc; alloc != got {
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t.Fatal("expected labelsToSignature with empty labels not to perform allocations")
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}
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}
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func BenchmarkLabelToSignature(b *testing.B) {
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for i := 0; i < b.N; i++ {
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testLabelsToSignature(b)
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}
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}
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func benchmarkLabelValuesToSignature(b *testing.B, l map[string]string, e uint64) {
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for i := 0; i < b.N; i++ {
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if a := labelValuesToSignature(l); a != e {
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b.Fatalf("expected signature of %d for %s, got %d", e, l, a)
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}
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}
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}
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func BenchmarkLabelValuesToSignatureScalar(b *testing.B) {
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benchmarkLabelValuesToSignature(b, nil, 14695981039346656037)
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}
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func BenchmarkLabelValuesToSignatureSingle(b *testing.B) {
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benchmarkLabelValuesToSignature(b, map[string]string{"first-label": "first-label-value"}, 2653746141194979650)
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}
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func BenchmarkLabelValuesToSignatureDouble(b *testing.B) {
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benchmarkLabelValuesToSignature(b, map[string]string{"first-label": "first-label-value", "second-label": "second-label-value"}, 5670080368112985613)
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}
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func BenchmarkLabelValuesToSignatureTriple(b *testing.B) {
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benchmarkLabelValuesToSignature(b, map[string]string{"first-label": "first-label-value", "second-label": "second-label-value", "third-label": "third-label-value"}, 2503588453955211397)
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}
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func benchmarkLabelToSignature(b *testing.B, l map[string]string, e uint64) {
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for i := 0; i < b.N; i++ {
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if a := labelsToSignature(l); a != e {
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b.Fatalf("expected signature of %d for %s, got %d", e, l, a)
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}
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}
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}
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func BenchmarkLabelToSignatureScalar(b *testing.B) {
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benchmarkLabelToSignature(b, nil, 14695981039346656037)
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}
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func BenchmarkLabelToSignatureSingle(b *testing.B) {
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benchmarkLabelToSignature(b, map[string]string{"first-label": "first-label-value"}, 2231159900647003583)
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}
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func BenchmarkLabelToSignatureDouble(b *testing.B) {
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benchmarkLabelToSignature(b, map[string]string{"first-label": "first-label-value", "second-label": "second-label-value"}, 14091549261072856487)
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}
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func BenchmarkLabelToSignatureTriple(b *testing.B) {
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benchmarkLabelToSignature(b, map[string]string{"first-label": "first-label-value", "second-label": "second-label-value", "third-label": "third-label-value"}, 9120920685107702735)
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}
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