124 lines
3.6 KiB
Go
124 lines
3.6 KiB
Go
/*
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Copyright 2017 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package metrics
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import (
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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ptype "github.com/prometheus/client_model/go"
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)
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func labelsMatch(metric *ptype.Metric, labelFilter map[string]string) bool {
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for _, lp := range metric.GetLabel() {
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if value, ok := labelFilter[lp.GetName()]; ok && lp.GetValue() != value {
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return false
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}
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}
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return true
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}
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// expectFindMetric find a metric with the given name nad labels or reports a fatal test error.
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func expectFindMetric(t *testing.T, name string, expectedLabels map[string]string) *ptype.Metric {
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metrics, err := prometheus.DefaultGatherer.Gather()
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if err != nil {
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t.Fatalf("Failed to gather metrics: %s", err)
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}
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for _, mf := range metrics {
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if mf.GetName() == name {
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for _, metric := range mf.GetMetric() {
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if labelsMatch(metric, expectedLabels) {
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gotLabelCount := len(metric.GetLabel())
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wantLabelCount := len(expectedLabels)
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if wantLabelCount != gotLabelCount {
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t.Errorf("Got metric with %d labels, but wanted %d labels. Wanted %#+v for %s",
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gotLabelCount, wantLabelCount, expectedLabels, metric.String())
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}
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return metric
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}
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}
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}
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}
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t.Fatalf("No metric found with name %s and labels %#+v", name, expectedLabels)
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return nil
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}
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// expectHistogramCountTotal ensures that the sum of counts of metrics matching the labelFilter is as
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// expected.
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func expectHistogramCountTotal(t *testing.T, name string, labelFilter map[string]string, wantCount int) {
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metrics, err := prometheus.DefaultGatherer.Gather()
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if err != nil {
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t.Fatalf("Failed to gather metrics: %s", err)
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}
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counterSum := 0
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for _, mf := range metrics {
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if mf.GetName() != name {
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continue // Ignore other metrics.
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}
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for _, metric := range mf.GetMetric() {
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if !labelsMatch(metric, labelFilter) {
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continue
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}
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counterSum += int(metric.GetHistogram().GetSampleCount())
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}
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}
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if wantCount != counterSum {
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t.Errorf("Wanted count %d, got %d for metric %s with labels %#+v", wantCount, counterSum, name, labelFilter)
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for _, mf := range metrics {
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if mf.GetName() == name {
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for _, metric := range mf.GetMetric() {
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t.Logf("\tnear match: %s", metric.String())
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}
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}
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}
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}
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}
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// expectCounterValue ensures that the counts of metrics matching the labelFilter is as
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// expected.
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func expectCounterValue(t *testing.T, name string, labelFilter map[string]string, wantCount int) {
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metrics, err := prometheus.DefaultGatherer.Gather()
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if err != nil {
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t.Fatalf("Failed to gather metrics: %s", err)
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}
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counterSum := 0
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for _, mf := range metrics {
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if mf.GetName() != name {
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continue // Ignore other metrics.
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}
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for _, metric := range mf.GetMetric() {
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if !labelsMatch(metric, labelFilter) {
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continue
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}
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counterSum += int(metric.GetCounter().GetValue())
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}
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}
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if wantCount != counterSum {
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t.Errorf("Wanted count %d, got %d for metric %s with labels %#+v", wantCount, counterSum, name, labelFilter)
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for _, mf := range metrics {
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if mf.GetName() == name {
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for _, metric := range mf.GetMetric() {
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t.Logf("\tnear match: %s", metric.String())
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}
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}
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}
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}
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}
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