mirror of
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116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
package prometheus_test
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import (
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"bytes"
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_ "embed"
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"io"
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"iter"
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"testing"
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"github.com/google/go-cmp/cmp"
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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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"github.com/pomerium/pomerium/internal/telemetry/prometheus"
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)
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//go:embed testdata/large.txt
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var exportTestData []byte
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func BenchmarkExport(b *testing.B) {
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r := bytes.NewReader(exportTestData)
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err := prometheus.Export(io.Discard,
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prometheus.AddLabels(prometheus.NewMetricFamilyStream(r),
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map[string]string{"installation_id": "abc1231-1231-1231-1231-1231", "hostname": "ec2-1231-1231-1231-1231-1231.us-west-2.compute.amazonaws.com"},
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))
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require.NoError(b, err)
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}
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func TestExport(t *testing.T) {
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it := func(data []*dto.MetricFamily) iter.Seq2[*dto.MetricFamily, error] {
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return func(yield func(*dto.MetricFamily, error) bool) {
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for _, mf := range data {
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if !yield(mf, nil) {
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return
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}
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}
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}
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}
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tests := []struct {
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name string
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expected string
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input []*dto.MetricFamily
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}{
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{
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name: "single metric family",
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expected: `# 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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input: []*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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},
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{
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name: "multiple metric families",
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expected: `# 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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input: []*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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},
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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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var w bytes.Buffer
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err := prometheus.Export(&w, it(tt.input))
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require.NoError(t, err)
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got := w.String()
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t.Log(got)
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diff := cmp.Diff(tt.expected, got)
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require.Empty(t, diff)
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})
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}
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}
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