forked from mirror/client_golang
313 lines
8.3 KiB
Go
313 lines
8.3 KiB
Go
// Copyright 2014 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus
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import (
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"fmt"
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"testing"
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dto "github.com/prometheus/client_model/go"
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)
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func TestDelete(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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testDelete(t, vec)
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}
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func TestDeleteWithCollisions(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
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vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
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testDelete(t, vec)
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}
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func testDelete(t *testing.T, vec *GaugeVec) {
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if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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vec.With(Labels{"l1": "v1", "l2": "v2"}).(Gauge).Set(42)
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if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), true; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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vec.With(Labels{"l1": "v1", "l2": "v2"}).(Gauge).Set(42)
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if got, want := vec.Delete(Labels{"l2": "v2", "l1": "v1"}), true; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.Delete(Labels{"l2": "v2", "l1": "v1"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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vec.With(Labels{"l1": "v1", "l2": "v2"}).(Gauge).Set(42)
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if got, want := vec.Delete(Labels{"l2": "v1", "l1": "v2"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.Delete(Labels{"l1": "v1"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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}
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func TestDeleteLabelValues(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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testDeleteLabelValues(t, vec)
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}
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func TestDeleteLabelValuesWithCollisions(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
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vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
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testDeleteLabelValues(t, vec)
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}
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func testDeleteLabelValues(t *testing.T, vec *GaugeVec) {
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if got, want := vec.DeleteLabelValues("v1", "v2"), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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vec.With(Labels{"l1": "v1", "l2": "v2"}).(Gauge).Set(42)
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vec.With(Labels{"l1": "v1", "l2": "v3"}).(Gauge).Set(42) // Add junk data for collision.
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if got, want := vec.DeleteLabelValues("v1", "v2"), true; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.DeleteLabelValues("v1", "v2"), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.DeleteLabelValues("v1", "v3"), true; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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vec.With(Labels{"l1": "v1", "l2": "v2"}).(Gauge).Set(42)
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// Delete out of order.
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if got, want := vec.DeleteLabelValues("v2", "v1"), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := vec.DeleteLabelValues("v1"), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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}
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func TestMetricVec(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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testMetricVec(t, vec)
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}
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func TestMetricVecWithCollisions(t *testing.T) {
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"l1", "l2"},
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)
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vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
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vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
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testMetricVec(t, vec)
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}
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func testMetricVec(t *testing.T, vec *GaugeVec) {
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vec.Reset() // Actually test Reset now!
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var pair [2]string
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// Keep track of metrics.
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expected := map[[2]string]int{}
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for i := 0; i < 1000; i++ {
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pair[0], pair[1] = fmt.Sprint(i%4), fmt.Sprint(i%5) // Varying combinations multiples.
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expected[pair]++
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vec.WithLabelValues(pair[0], pair[1]).Inc()
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expected[[2]string{"v1", "v2"}]++
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vec.WithLabelValues("v1", "v2").(Gauge).Inc()
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}
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var total int
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for _, metrics := range vec.children {
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for _, metric := range metrics {
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total++
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copy(pair[:], metric.values)
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var metricOut dto.Metric
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if err := metric.metric.Write(&metricOut); err != nil {
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t.Fatal(err)
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}
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actual := *metricOut.Gauge.Value
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var actualPair [2]string
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for i, label := range metricOut.Label {
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actualPair[i] = *label.Value
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}
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// Test output pair against metric.values to ensure we've selected
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// the right one. We check this to ensure the below check means
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// anything at all.
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if actualPair != pair {
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t.Fatalf("unexpected pair association in metric map: %v != %v", actualPair, pair)
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}
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if actual != float64(expected[pair]) {
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t.Fatalf("incorrect counter value for %v: %v != %v", pair, actual, expected[pair])
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}
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}
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}
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if total != len(expected) {
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t.Fatalf("unexpected number of metrics: %v != %v", total, len(expected))
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}
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vec.Reset()
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if len(vec.children) > 0 {
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t.Fatalf("reset failed")
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}
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}
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func TestCounterVecEndToEndWithCollision(t *testing.T) {
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vec := NewCounterVec(
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CounterOpts{
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Name: "test",
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Help: "helpless",
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},
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[]string{"labelname"},
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)
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vec.WithLabelValues("77kepQFQ8Kl").Inc()
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vec.WithLabelValues("!0IC=VloaY").Add(2)
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m := &dto.Metric{}
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if err := vec.WithLabelValues("77kepQFQ8Kl").Write(m); err != nil {
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t.Fatal(err)
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}
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if got, want := m.GetLabel()[0].GetValue(), "77kepQFQ8Kl"; got != want {
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t.Errorf("got label value %q, want %q", got, want)
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}
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if got, want := m.GetCounter().GetValue(), 1.; got != want {
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t.Errorf("got value %f, want %f", got, want)
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}
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m.Reset()
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if err := vec.WithLabelValues("!0IC=VloaY").Write(m); err != nil {
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t.Fatal(err)
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}
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if got, want := m.GetLabel()[0].GetValue(), "!0IC=VloaY"; got != want {
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t.Errorf("got label value %q, want %q", got, want)
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}
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if got, want := m.GetCounter().GetValue(), 2.; got != want {
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t.Errorf("got value %f, want %f", got, want)
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}
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}
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func BenchmarkMetricVecWithLabelValuesBasic(b *testing.B) {
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benchmarkMetricVecWithLabelValues(b, map[string][]string{
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"l1": {"onevalue"},
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"l2": {"twovalue"},
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})
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}
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func BenchmarkMetricVecWithLabelValues2Keys10ValueCardinality(b *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(b, 2, 10)
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}
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func BenchmarkMetricVecWithLabelValues4Keys10ValueCardinality(b *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(b, 4, 10)
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}
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func BenchmarkMetricVecWithLabelValues2Keys100ValueCardinality(b *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(b, 2, 100)
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}
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func BenchmarkMetricVecWithLabelValues10Keys100ValueCardinality(b *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(b, 10, 100)
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}
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func BenchmarkMetricVecWithLabelValues10Keys1000ValueCardinality(b *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(b, 10, 1000)
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}
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func benchmarkMetricVecWithLabelValuesCardinality(b *testing.B, nkeys, nvalues int) {
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labels := map[string][]string{}
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for i := 0; i < nkeys; i++ {
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var (
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k = fmt.Sprintf("key-%v", i)
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vs = make([]string, 0, nvalues)
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)
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for j := 0; j < nvalues; j++ {
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vs = append(vs, fmt.Sprintf("value-%v", j))
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}
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labels[k] = vs
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}
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benchmarkMetricVecWithLabelValues(b, labels)
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}
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func benchmarkMetricVecWithLabelValues(b *testing.B, labels map[string][]string) {
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var keys []string
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for k := range labels { // Map order dependent, who cares though.
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keys = append(keys, k)
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}
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values := make([]string, len(labels)) // Value cache for permutations.
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vec := NewGaugeVec(
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GaugeOpts{
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Name: "test",
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Help: "helpless",
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},
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keys,
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)
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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// Varies input across provide map entries based on key size.
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for j, k := range keys {
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candidates := labels[k]
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values[j] = candidates[i%len(candidates)]
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}
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vec.WithLabelValues(values...)
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}
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}
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