mirror of
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113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
package prometheus_test
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import (
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"errors"
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"io"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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dto "github.com/prometheus/client_model/go"
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"github.com/stretchr/testify/require"
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"google.golang.org/protobuf/proto"
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"google.golang.org/protobuf/testing/protocmp"
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"github.com/pomerium/pomerium/internal/telemetry/prometheus"
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)
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func TestMetricFamilyStream(t *testing.T) {
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tests := []struct {
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name string
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input string
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expected []*dto.MetricFamily
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wantErr bool
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}{
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{
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name: "single metric family",
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input: `
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# HELP http_requests_total The total number of HTTP requests.
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# TYPE http_requests_total counter
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http_requests_total{method="post",code="200"} 1027 1395066363000
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`,
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expected: []*dto.MetricFamily{
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{
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Name: proto.String("http_requests_total"),
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Help: proto.String("The total number of HTTP requests."),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{Name: proto.String("method"), Value: proto.String("post")},
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{Name: proto.String("code"), Value: proto.String("200")},
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},
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Counter: &dto.Counter{Value: proto.Float64(1027)},
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TimestampMs: proto.Int64(1395066363000),
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},
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},
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},
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},
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wantErr: false,
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},
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{
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name: "multiple metric families",
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input: `
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# TYPE http_requests_total counter
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http_requests_total{method="post",code="200"} 1027 1395066363000
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# TYPE cpu_seconds_total counter
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cpu_seconds_total 12345.6
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`,
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expected: []*dto.MetricFamily{
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{
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Name: proto.String("http_requests_total"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{Name: proto.String("method"), Value: proto.String("post")},
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{Name: proto.String("code"), Value: proto.String("200")},
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},
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Counter: &dto.Counter{Value: proto.Float64(1027)},
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TimestampMs: proto.Int64(1395066363000),
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},
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},
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},
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{
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Name: proto.String("cpu_seconds_total"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Counter: &dto.Counter{Value: proto.Float64(12345.6)},
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},
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},
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},
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},
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wantErr: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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reader := strings.NewReader(tt.input)
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metricStream := prometheus.NewMetricFamilyStream(reader)
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var got []*dto.MetricFamily
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for {
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mf, err := metricStream.Next()
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if errors.Is(err, io.EOF) {
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break
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}
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if (err != nil) != tt.wantErr {
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t.Errorf("MetricFamilyStream.Next() error = %v, wantErr %v", err, tt.wantErr)
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return
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}
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if err == nil {
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got = append(got, mf)
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}
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}
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diff := cmp.Diff(tt.expected, got, protocmp.Transform(), cmpopts.IgnoreUnexported(dto.MetricFamily{}, dto.Metric{}, dto.LabelPair{}, dto.Counter{}))
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require.Empty(t, diff)
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})
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}
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}
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