|
| 1 | +package sinks |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "strings" |
| 6 | + "testing" |
| 7 | + |
| 8 | + "github.com/prometheus/client_golang/prometheus" |
| 9 | + "github.com/resmoio/kubernetes-event-exporter/pkg/kube" |
| 10 | + "github.com/stretchr/testify/mock" |
| 11 | +) |
| 12 | + |
| 13 | +type mockGauge struct { |
| 14 | + mock.Mock |
| 15 | + prometheus.Gauge |
| 16 | +} |
| 17 | + |
| 18 | +func (m *mockGauge) Set(count float64) { |
| 19 | + m.Called(count) |
| 20 | +} |
| 21 | + |
| 22 | +type mockGuageVec struct { |
| 23 | + mock.Mock |
| 24 | + *prometheus.GaugeVec |
| 25 | +} |
| 26 | + |
| 27 | +func (v *mockGuageVec) With(labels prometheus.Labels) prometheus.Gauge { |
| 28 | + withArgs := v.Called(labels) |
| 29 | + return withArgs.Get(0).(prometheus.Gauge) |
| 30 | +} |
| 31 | + |
| 32 | +func (v *mockGuageVec) Delete(labels prometheus.Labels) bool { |
| 33 | + deleteArgs := v.Called(labels) |
| 34 | + return deleteArgs.Get(0).(bool) |
| 35 | +} |
| 36 | + |
| 37 | +func mockEvent(kind string, name string, namespace string, reason string, count int32) *kube.EnhancedEvent { |
| 38 | + ev := &kube.EnhancedEvent{} |
| 39 | + ev.Reason = reason |
| 40 | + ev.Count = count |
| 41 | + ev.InvolvedObject.Kind = kind |
| 42 | + ev.InvolvedObject.Name = name |
| 43 | + ev.InvolvedObject.Namespace = namespace |
| 44 | + |
| 45 | + return ev |
| 46 | +} |
| 47 | + |
| 48 | +func TestPrometheusSink_Send(t *testing.T) { |
| 49 | + configKind := "Pod" |
| 50 | + configReason := "Starting" |
| 51 | + testEvent := mockEvent("Pod", "testpod", "testnamespace", "Starting", 1) |
| 52 | + |
| 53 | + tests := []struct { |
| 54 | + name string |
| 55 | + configKind string |
| 56 | + configReason string |
| 57 | + ev *kube.EnhancedEvent |
| 58 | + wantPrometheusLabels prometheus.Labels |
| 59 | + wantErr bool |
| 60 | + wantSetCalled bool |
| 61 | + wantDeleteCalled bool |
| 62 | + }{ |
| 63 | + { |
| 64 | + name: "emits desired resource event with resource label", |
| 65 | + configKind: configKind, |
| 66 | + configReason: configReason, |
| 67 | + ev: testEvent, |
| 68 | + wantPrometheusLabels: prometheus.Labels{ |
| 69 | + strings.ToLower(configKind): testEvent.InvolvedObject.Name, |
| 70 | + "namespace": testEvent.InvolvedObject.Namespace, |
| 71 | + "reason": configReason, |
| 72 | + }, |
| 73 | + wantErr: false, |
| 74 | + wantSetCalled: true, |
| 75 | + wantDeleteCalled: false, |
| 76 | + }, |
| 77 | + { |
| 78 | + name: "deletes desired resource event with resource label", |
| 79 | + configKind: configKind, |
| 80 | + configReason: "Creating", |
| 81 | + ev: testEvent, |
| 82 | + wantPrometheusLabels: prometheus.Labels{ |
| 83 | + strings.ToLower(configKind): testEvent.InvolvedObject.Name, |
| 84 | + "namespace": testEvent.InvolvedObject.Namespace, |
| 85 | + "reason": "Creating", |
| 86 | + }, |
| 87 | + wantErr: false, |
| 88 | + wantSetCalled: false, |
| 89 | + wantDeleteCalled: true, |
| 90 | + }, |
| 91 | + { |
| 92 | + name: "does nothing if kind is not expected", |
| 93 | + configKind: "ReplicaSet", |
| 94 | + configReason: "SuccessfulCreate", |
| 95 | + ev: testEvent, |
| 96 | + wantPrometheusLabels: prometheus.Labels{}, |
| 97 | + wantErr: false, |
| 98 | + wantSetCalled: false, |
| 99 | + wantDeleteCalled: false, |
| 100 | + }, |
| 101 | + } |
| 102 | + for _, tt := range tests { |
| 103 | + mockGauge := &mockGauge{} |
| 104 | + mockGauge.On("Set", mock.Anything).Return() |
| 105 | + mockPodMetric := &mockGuageVec{} |
| 106 | + mockPodMetric.On("With", mock.Anything).Return(mockGauge) |
| 107 | + mockPodMetric.On("Delete", mock.Anything).Return(true) |
| 108 | + |
| 109 | + t.Run(tt.name, func(t *testing.T) { |
| 110 | + o := &PrometheusSink{ |
| 111 | + cfg: &PrometheusConfig{ |
| 112 | + EventsMetricsNamePrefix: "test_prefix_", |
| 113 | + ReasonFilter: map[string][]string{tt.configKind: {tt.configReason}}, |
| 114 | + }, |
| 115 | + kinds: []string{tt.configKind}, |
| 116 | + metricsByKind: map[string]PrometheusGaugeVec{tt.configKind: mockPodMetric}, |
| 117 | + } |
| 118 | + if err := o.Send(context.TODO(), tt.ev); (err != nil) != tt.wantErr { |
| 119 | + t.Errorf("PrometheusSink.Send() error = %v, wantErr %v", err, tt.wantErr) |
| 120 | + } |
| 121 | + |
| 122 | + if tt.wantSetCalled { |
| 123 | + mockPodMetric.AssertCalled(t, "With", tt.wantPrometheusLabels) |
| 124 | + mockGauge.AssertCalled(t, "Set", float64(1)) |
| 125 | + } else { |
| 126 | + mockPodMetric.AssertNotCalled(t, "With") |
| 127 | + mockGauge.AssertNotCalled(t, "Set") |
| 128 | + } |
| 129 | + |
| 130 | + if tt.wantDeleteCalled { |
| 131 | + mockPodMetric.AssertCalled(t, "Delete", tt.wantPrometheusLabels) |
| 132 | + } else { |
| 133 | + mockPodMetric.AssertNotCalled(t, "Delete") |
| 134 | + } |
| 135 | + }) |
| 136 | + } |
| 137 | +} |
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