forked from mirror/client_golang
89 lines
2.9 KiB
Go
89 lines
2.9 KiB
Go
// Copyright 2014 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus
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import (
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"math"
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"testing"
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//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
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"github.com/golang/protobuf/proto"
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dto "github.com/prometheus/client_model/go"
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)
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func TestBuildFQName(t *testing.T) {
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scenarios := []struct{ namespace, subsystem, name, result string }{
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{"a", "b", "c", "a_b_c"},
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{"", "b", "c", "b_c"},
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{"a", "", "c", "a_c"},
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{"", "", "c", "c"},
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{"a", "b", "", ""},
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{"a", "", "", ""},
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{"", "b", "", ""},
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{" ", "", "", ""},
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}
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for i, s := range scenarios {
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if want, got := s.result, BuildFQName(s.namespace, s.subsystem, s.name); want != got {
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t.Errorf("%d. want %s, got %s", i, want, got)
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}
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}
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}
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func TestWithExemplarsMetric(t *testing.T) {
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t.Run("histogram", func(t *testing.T) {
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// Create a constant histogram from values we got from a 3rd party telemetry system.
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h := MustNewConstHistogram(
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NewDesc("http_request_duration_seconds", "A histogram of the HTTP request durations.", nil, nil),
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4711, 403.34,
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// Four buckets, but we expect five as the +Inf bucket will be created if we see value outside of those buckets.
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map[float64]uint64{25: 121, 50: 2403, 100: 3221, 200: 4233},
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)
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m := &withExemplarsMetric{Metric: h, exemplars: []*dto.Exemplar{
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{Value: proto.Float64(2000.0)}, // Unordered exemplars.
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{Value: proto.Float64(500.0)},
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{Value: proto.Float64(42.0)},
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{Value: proto.Float64(157.0)},
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{Value: proto.Float64(100.0)},
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{Value: proto.Float64(89.0)},
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{Value: proto.Float64(24.0)},
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{Value: proto.Float64(25.1)},
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}}
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metric := dto.Metric{}
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if err := m.Write(&metric); err != nil {
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t.Fatal(err)
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}
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if want, got := 5, len(metric.GetHistogram().Bucket); want != got {
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t.Errorf("want %v, got %v", want, got)
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}
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expectedExemplarVals := []float64{24.0, 25.1, 89.0, 157.0, 500.0}
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for i, b := range metric.GetHistogram().Bucket {
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if b.Exemplar == nil {
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t.Errorf("Expected exemplar for bucket %v, got nil", i)
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}
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if want, got := expectedExemplarVals[i], *metric.GetHistogram().Bucket[i].Exemplar.Value; want != got {
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t.Errorf("%v: want %v, got %v", i, want, got)
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}
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}
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infBucket := metric.GetHistogram().Bucket[len(metric.GetHistogram().Bucket)-1].GetUpperBound()
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if infBucket != math.Inf(1) {
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t.Errorf("want %v, got %v", math.Inf(1), infBucket)
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}
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})
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}
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