105 lines
3.1 KiB
Go
105 lines
3.1 KiB
Go
package metrics
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import (
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"net/http"
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"strconv"
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"testing"
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"github.com/containous/traefik/types"
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"github.com/prometheus/client_golang/prometheus"
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dto "github.com/prometheus/client_model/go"
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)
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func TestPrometheus(t *testing.T) {
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prometheusRegistry := RegisterPrometheus(&types.Prometheus{})
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if !prometheusRegistry.IsEnabled() {
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t.Errorf("PrometheusRegistry should return true for IsEnabled()")
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}
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prometheusRegistry.ReqsCounter().With("service", "test", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet).Add(1)
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prometheusRegistry.ReqsCounter().With("service", "test", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet).Add(1)
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prometheusRegistry.ReqDurationHistogram().With("service", "test", "code", strconv.Itoa(http.StatusOK)).Observe(10000)
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prometheusRegistry.ReqDurationHistogram().With("service", "test", "code", strconv.Itoa(http.StatusOK)).Observe(10000)
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prometheusRegistry.RetriesCounter().With("service", "test").Add(1)
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metricsFamilies, err := prometheus.DefaultGatherer.Gather()
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if err != nil {
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t.Fatalf("could not gather metrics families: %s", err)
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}
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tests := []struct {
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name string
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labels map[string]string
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assert func(*dto.MetricFamily)
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}{
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{
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name: reqsTotalName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"service": "test",
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},
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assert: func(family *dto.MetricFamily) {
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cv := family.Metric[0].Counter.GetValue()
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expectedCv := float64(2)
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if cv != expectedCv {
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t.Errorf("gathered metrics do not contain correct value for total requests, got %f expected %f", cv, expectedCv)
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}
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},
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},
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{
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name: reqDurationName,
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labels: map[string]string{
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"service": "test",
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"code": "200",
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},
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assert: func(family *dto.MetricFamily) {
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sc := family.Metric[0].Histogram.GetSampleCount()
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expectedSc := uint64(2)
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if sc != expectedSc {
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t.Errorf("gathered metrics do not contain correct sample count for request duration, got %d expected %d", sc, expectedSc)
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}
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},
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},
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{
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name: retriesTotalName,
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labels: map[string]string{
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"service": "test",
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},
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assert: func(family *dto.MetricFamily) {
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cv := family.Metric[0].Counter.GetValue()
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expectedCv := float64(1)
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if cv != expectedCv {
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t.Errorf("gathered metrics do not contain correct value for total retries, got %f expected %f", cv, expectedCv)
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}
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},
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},
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}
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for _, test := range tests {
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family := findMetricFamily(test.name, metricsFamilies)
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if family == nil {
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t.Errorf("gathered metrics do not contain %q", test.name)
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continue
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}
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for _, label := range family.Metric[0].Label {
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val, ok := test.labels[*label.Name]
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if !ok {
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t.Errorf("%q metric contains unexpected label %q", test.name, *label.Name)
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} else if val != *label.Value {
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t.Errorf("label %q in metric %q has wrong value %q, expected %q", *label.Name, test.name, *label.Value, val)
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}
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}
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test.assert(family)
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}
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}
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func findMetricFamily(name string, families []*dto.MetricFamily) *dto.MetricFamily {
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for _, family := range families {
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if family.GetName() == name {
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return family
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}
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}
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return nil
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}
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