mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-14 10:13:10 +02:00
263 lines
7.3 KiB
Go
263 lines
7.3 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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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 histogram_test
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import (
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"math"
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"math/rand"
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"sort"
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"testing"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/number"
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export "go.opentelemetry.io/otel/sdk/export/metric"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/aggregatortest"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/histogram"
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)
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const count = 100
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type policy struct {
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name string
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absolute bool
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sign func() int
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}
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var (
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positiveOnly = policy{
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name: "absolute",
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absolute: true,
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sign: func() int { return +1 },
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}
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negativeOnly = policy{
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name: "negative",
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absolute: false,
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sign: func() int { return -1 },
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}
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positiveAndNegative = policy{
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name: "positiveAndNegative",
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absolute: false,
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sign: func() int {
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if rand.Uint32() > math.MaxUint32/2 {
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return -1
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}
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return 1
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},
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}
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boundaries = []float64{500, 250, 750}
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)
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func new2(desc *metric.Descriptor) (_, _ *histogram.Aggregator) {
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alloc := histogram.New(2, desc, boundaries)
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return &alloc[0], &alloc[1]
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}
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func new4(desc *metric.Descriptor) (_, _, _, _ *histogram.Aggregator) {
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alloc := histogram.New(4, desc, boundaries)
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return &alloc[0], &alloc[1], &alloc[2], &alloc[3]
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}
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func checkZero(t *testing.T, agg *histogram.Aggregator, desc *metric.Descriptor) {
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asum, err := agg.Sum()
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require.Equal(t, number.Number(0), asum, "Empty checkpoint sum = 0")
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require.NoError(t, err)
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count, err := agg.Count()
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require.Equal(t, uint64(0), count, "Empty checkpoint count = 0")
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require.NoError(t, err)
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buckets, err := agg.Histogram()
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require.NoError(t, err)
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require.Equal(t, len(buckets.Counts), len(boundaries)+1, "There should be b + 1 counts, where b is the number of boundaries")
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for i, bCount := range buckets.Counts {
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require.Equal(t, uint64(0), uint64(bCount), "Bucket #%d must have 0 observed values", i)
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}
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}
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func TestHistogramAbsolute(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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testHistogram(t, profile, positiveOnly)
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})
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}
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func TestHistogramNegativeOnly(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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testHistogram(t, profile, negativeOnly)
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})
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}
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func TestHistogramPositiveAndNegative(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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testHistogram(t, profile, positiveAndNegative)
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})
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}
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// Validates count, sum and buckets for a given profile and policy
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func testHistogram(t *testing.T, profile aggregatortest.Profile, policy policy) {
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descriptor := aggregatortest.NewAggregatorTest(metric.ValueRecorderInstrumentKind, profile.NumberKind)
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agg, ckpt := new2(descriptor)
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all := aggregatortest.NewNumbers(profile.NumberKind)
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for i := 0; i < count; i++ {
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x := profile.Random(policy.sign())
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all.Append(x)
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aggregatortest.CheckedUpdate(t, agg, x, descriptor)
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}
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require.NoError(t, agg.SynchronizedMove(ckpt, descriptor))
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checkZero(t, agg, descriptor)
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all.Sort()
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asum, err := ckpt.Sum()
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sum := all.Sum()
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require.InEpsilon(t,
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sum.CoerceToFloat64(profile.NumberKind),
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asum.CoerceToFloat64(profile.NumberKind),
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0.000000001,
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"Same sum - "+policy.name)
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require.NoError(t, err)
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count, err := ckpt.Count()
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require.Equal(t, all.Count(), count, "Same count -"+policy.name)
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require.NoError(t, err)
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buckets, err := ckpt.Histogram()
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require.NoError(t, err)
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require.Equal(t, len(buckets.Counts), len(boundaries)+1, "There should be b + 1 counts, where b is the number of boundaries")
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counts := calcBuckets(all.Points(), profile)
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for i, v := range counts {
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bCount := uint64(buckets.Counts[i])
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require.Equal(t, v, bCount, "Wrong bucket #%d count: %v != %v", i, counts, buckets.Counts)
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}
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}
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func TestHistogramInitial(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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descriptor := aggregatortest.NewAggregatorTest(metric.ValueRecorderInstrumentKind, profile.NumberKind)
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agg := &histogram.New(1, descriptor, boundaries)[0]
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buckets, err := agg.Histogram()
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require.NoError(t, err)
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require.Equal(t, len(buckets.Counts), len(boundaries)+1)
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require.Equal(t, len(buckets.Boundaries), len(boundaries))
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})
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}
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func TestHistogramMerge(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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descriptor := aggregatortest.NewAggregatorTest(metric.ValueRecorderInstrumentKind, profile.NumberKind)
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agg1, agg2, ckpt1, ckpt2 := new4(descriptor)
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all := aggregatortest.NewNumbers(profile.NumberKind)
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for i := 0; i < count; i++ {
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x := profile.Random(+1)
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all.Append(x)
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aggregatortest.CheckedUpdate(t, agg1, x, descriptor)
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}
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for i := 0; i < count; i++ {
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x := profile.Random(+1)
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all.Append(x)
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aggregatortest.CheckedUpdate(t, agg2, x, descriptor)
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}
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require.NoError(t, agg1.SynchronizedMove(ckpt1, descriptor))
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require.NoError(t, agg2.SynchronizedMove(ckpt2, descriptor))
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aggregatortest.CheckedMerge(t, ckpt1, ckpt2, descriptor)
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all.Sort()
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asum, err := ckpt1.Sum()
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sum := all.Sum()
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require.InEpsilon(t,
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sum.CoerceToFloat64(profile.NumberKind),
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asum.CoerceToFloat64(profile.NumberKind),
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0.000000001,
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"Same sum - absolute")
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require.NoError(t, err)
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count, err := ckpt1.Count()
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require.Equal(t, all.Count(), count, "Same count - absolute")
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require.NoError(t, err)
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buckets, err := ckpt1.Histogram()
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require.NoError(t, err)
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require.Equal(t, len(buckets.Counts), len(boundaries)+1, "There should be b + 1 counts, where b is the number of boundaries")
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counts := calcBuckets(all.Points(), profile)
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for i, v := range counts {
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bCount := uint64(buckets.Counts[i])
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require.Equal(t, v, bCount, "Wrong bucket #%d count: %v != %v", i, counts, buckets.Counts)
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}
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})
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}
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func TestHistogramNotSet(t *testing.T) {
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aggregatortest.RunProfiles(t, func(t *testing.T, profile aggregatortest.Profile) {
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descriptor := aggregatortest.NewAggregatorTest(metric.ValueRecorderInstrumentKind, profile.NumberKind)
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agg, ckpt := new2(descriptor)
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err := agg.SynchronizedMove(ckpt, descriptor)
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require.NoError(t, err)
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checkZero(t, agg, descriptor)
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checkZero(t, ckpt, descriptor)
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})
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}
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func calcBuckets(points []number.Number, profile aggregatortest.Profile) []uint64 {
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sortedBoundaries := make([]float64, len(boundaries))
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copy(sortedBoundaries, boundaries)
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sort.Float64s(sortedBoundaries)
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counts := make([]uint64, len(sortedBoundaries)+1)
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idx := 0
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for _, p := range points {
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for idx < len(sortedBoundaries) && p.CoerceToFloat64(profile.NumberKind) >= sortedBoundaries[idx] {
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idx++
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}
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counts[idx]++
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}
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return counts
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}
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func TestSynchronizedMoveReset(t *testing.T) {
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aggregatortest.SynchronizedMoveResetTest(
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t,
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metric.ValueRecorderInstrumentKind,
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func(desc *metric.Descriptor) export.Aggregator {
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return &histogram.New(1, desc, boundaries)[0]
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},
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)
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}
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