1/* 2Copyright 2017 The Kubernetes Authors. 3 4Licensed under the Apache License, Version 2.0 (the "License"); 5you may not use this file except in compliance with the License. 6You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10Unless required by applicable law or agreed to in writing, software 11distributed under the License is distributed on an "AS IS" BASIS, 12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13See the License for the specific language governing permissions and 14limitations under the License. 15*/ 16 17package metrics 18 19import ( 20 "testing" 21 22 "k8s.io/component-base/metrics/legacyregistry" 23 "k8s.io/component-base/metrics/testutil" 24) 25 26// expectFindMetric find a metric with the given name nad labels or reports a fatal test error. 27func expectFindMetric(t *testing.T, name string, expectedLabels map[string]string) { 28 metrics, err := legacyregistry.DefaultGatherer.Gather() 29 if err != nil { 30 t.Fatalf("Failed to gather metrics: %s", err) 31 } 32 33 if len(metrics) == 0 { 34 t.Fatalf("No metric found with name %s and labels %#+v", name, expectedLabels) 35 } 36 37 for _, mf := range metrics { 38 if mf.GetName() == name { 39 for _, metric := range mf.GetMetric() { 40 if testutil.LabelsMatch(metric, expectedLabels) { 41 gotLabelCount := len(metric.GetLabel()) 42 wantLabelCount := len(expectedLabels) 43 if wantLabelCount != gotLabelCount { 44 t.Errorf("Got metric with %d labels, but wanted %d labels. Wanted %#+v for %s", 45 gotLabelCount, wantLabelCount, expectedLabels, metric.String()) 46 continue 47 } 48 } 49 } 50 } 51 } 52} 53 54// expectHistogramCountTotal ensures that the sum of counts of metrics matching the labelFilter is as 55// expected. 56func expectHistogramCountTotal(t *testing.T, name string, labelFilter map[string]string, wantCount int) { 57 metrics, err := legacyregistry.DefaultGatherer.Gather() 58 if err != nil { 59 t.Fatalf("Failed to gather metrics: %s", err) 60 } 61 62 counterSum := 0 63 for _, mf := range metrics { 64 if mf.GetName() != name { 65 continue // Ignore other metrics. 66 } 67 for _, metric := range mf.GetMetric() { 68 if !testutil.LabelsMatch(metric, labelFilter) { 69 continue 70 } 71 counterSum += int(metric.GetHistogram().GetSampleCount()) 72 } 73 } 74 if wantCount != counterSum { 75 t.Errorf("Wanted count %d, got %d for metric %s with labels %#+v", wantCount, counterSum, name, labelFilter) 76 for _, mf := range metrics { 77 if mf.GetName() == name { 78 for _, metric := range mf.GetMetric() { 79 t.Logf("\tnear match: %s", metric.String()) 80 } 81 } 82 } 83 } 84} 85 86// expectCounterValue ensures that the counts of metrics matching the labelFilter is as 87// expected. 88func expectCounterValue(t *testing.T, name string, labelFilter map[string]string, wantCount int) { 89 metrics, err := legacyregistry.DefaultGatherer.Gather() 90 if err != nil { 91 t.Fatalf("Failed to gather metrics: %s", err) 92 } 93 94 counterSum := 0 95 for _, mf := range metrics { 96 if mf.GetName() != name { 97 continue // Ignore other metrics. 98 } 99 for _, metric := range mf.GetMetric() { 100 if !testutil.LabelsMatch(metric, labelFilter) { 101 continue 102 } 103 counterSum += int(metric.GetCounter().GetValue()) 104 } 105 } 106 if wantCount != counterSum { 107 t.Errorf("Wanted count %d, got %d for metric %s with labels %#+v", wantCount, counterSum, name, labelFilter) 108 for _, mf := range metrics { 109 if mf.GetName() == name { 110 for _, metric := range mf.GetMetric() { 111 t.Logf("\tnear match: %s", metric.String()) 112 } 113 } 114 } 115 } 116} 117