2019-10-29 22:27:22 +02:00
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// Copyright 2019, 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 gauge
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import (
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"context"
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"math/rand"
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"testing"
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"github.com/stretchr/testify/require"
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2019-11-01 20:40:29 +02:00
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"go.opentelemetry.io/otel/api/core"
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2019-11-05 23:08:55 +02:00
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export "go.opentelemetry.io/otel/sdk/export/metric"
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"go.opentelemetry.io/otel/sdk/export/metric/aggregator"
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2019-11-01 20:40:29 +02:00
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"go.opentelemetry.io/otel/sdk/metric/aggregator/test"
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2019-10-29 22:27:22 +02:00
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)
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const count = 100
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2019-11-05 23:08:55 +02:00
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var _ export.Aggregator = &Aggregator{}
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func TestGaugeNonMonotonic(t *testing.T) {
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ctx := context.Background()
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test.RunProfiles(t, func(t *testing.T, profile test.Profile) {
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agg := New()
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record := test.NewAggregatorTest(export.GaugeKind, profile.NumberKind, false)
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var last core.Number
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for i := 0; i < count; i++ {
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x := profile.Random(rand.Intn(1)*2 - 1)
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last = x
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test.CheckedUpdate(t, agg, x, record)
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}
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agg.Checkpoint(ctx, record)
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lv, _, err := agg.LastValue()
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require.Equal(t, last, lv, "Same last value - non-monotonic")
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require.Nil(t, err)
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})
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}
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func TestGaugeMonotonic(t *testing.T) {
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ctx := context.Background()
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test.RunProfiles(t, func(t *testing.T, profile test.Profile) {
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agg := New()
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record := test.NewAggregatorTest(export.GaugeKind, profile.NumberKind, true)
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small := profile.Random(+1)
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last := small
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for i := 0; i < count; i++ {
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x := profile.Random(+1)
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last.AddNumber(profile.NumberKind, x)
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test.CheckedUpdate(t, agg, last, record)
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}
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agg.Checkpoint(ctx, record)
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lv, _, err := agg.LastValue()
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require.Equal(t, last, lv, "Same last value - monotonic")
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require.Nil(t, err)
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})
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}
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func TestGaugeMonotonicDescending(t *testing.T) {
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ctx := context.Background()
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test.RunProfiles(t, func(t *testing.T, profile test.Profile) {
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agg := New()
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record := test.NewAggregatorTest(export.GaugeKind, profile.NumberKind, true)
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first := profile.Random(+1)
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test.CheckedUpdate(t, agg, first, record)
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for i := 0; i < count; i++ {
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x := profile.Random(-1)
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err := agg.Update(ctx, x, record)
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if err != aggregator.ErrNonMonotoneInput {
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t.Error("Expected ErrNonMonotoneInput", err)
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}
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}
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agg.Checkpoint(ctx, record)
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lv, _, err := agg.LastValue()
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require.Equal(t, first, lv, "Same last value - monotonic")
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require.Nil(t, err)
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})
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}
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2019-10-31 07:15:27 +02:00
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func TestGaugeNormalMerge(t *testing.T) {
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ctx := context.Background()
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test.RunProfiles(t, func(t *testing.T, profile test.Profile) {
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agg1 := New()
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agg2 := New()
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descriptor := test.NewAggregatorTest(export.GaugeKind, profile.NumberKind, false)
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first1 := profile.Random(+1)
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first2 := profile.Random(+1)
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first1.AddNumber(profile.NumberKind, first2)
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test.CheckedUpdate(t, agg1, first1, descriptor)
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test.CheckedUpdate(t, agg2, first2, descriptor)
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agg1.Checkpoint(ctx, descriptor)
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agg2.Checkpoint(ctx, descriptor)
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_, t1, err := agg1.LastValue()
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require.Nil(t, err)
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_, t2, err := agg2.LastValue()
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require.Nil(t, err)
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require.True(t, t1.Before(t2))
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test.CheckedMerge(t, agg1, agg2, descriptor)
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lv, ts, err := agg1.LastValue()
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require.Nil(t, err)
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require.Equal(t, t2, ts, "Merged timestamp - non-monotonic")
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require.Equal(t, first2, lv, "Merged value - non-monotonic")
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})
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}
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func TestGaugeMonotonicMerge(t *testing.T) {
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ctx := context.Background()
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test.RunProfiles(t, func(t *testing.T, profile test.Profile) {
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agg1 := New()
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agg2 := New()
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descriptor := test.NewAggregatorTest(export.GaugeKind, profile.NumberKind, true)
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first1 := profile.Random(+1)
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test.CheckedUpdate(t, agg1, first1, descriptor)
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first2 := profile.Random(+1)
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first2.AddNumber(profile.NumberKind, first1)
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test.CheckedUpdate(t, agg2, first2, descriptor)
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agg1.Checkpoint(ctx, descriptor)
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agg2.Checkpoint(ctx, descriptor)
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test.CheckedMerge(t, agg1, agg2, descriptor)
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_, ts2, err := agg1.LastValue()
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require.Nil(t, err)
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lv, ts1, err := agg1.LastValue()
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require.Nil(t, err)
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require.Equal(t, first2, lv, "Merged value - monotonic")
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require.Equal(t, ts2, ts1, "Merged timestamp - monotonic")
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})
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}
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func TestGaugeNotSet(t *testing.T) {
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descriptor := test.NewAggregatorTest(export.GaugeKind, core.Int64NumberKind, true)
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g := New()
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g.Checkpoint(context.Background(), descriptor)
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value, timestamp, err := g.LastValue()
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require.Equal(t, aggregator.ErrNoLastValue, err)
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require.True(t, timestamp.IsZero())
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require.Equal(t, core.Number(0), value)
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}
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