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Add test utilities for testing different sample types.
Co-authored-by: Fiona Liao <fiona.liao@grafana.com> Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com>
This commit is contained in:
Carrie Edwards
parent
134e8dc7af
commit
60917f628b
194
tsdb/testutil.go
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194
tsdb/testutil.go
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// Copyright 2017 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 tsdb
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import (
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prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
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"testing"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/tsdb/chunks"
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)
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const (
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float = "float"
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)
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type tsValue struct {
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Ts int64
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V int64
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CounterResetHeader histogram.CounterResetHint
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}
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type sampleTypeScenario struct {
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sampleType string
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appendFunc func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error)
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sampleFunc func(ts, value int64) sample
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}
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var sampleTypeScenarios = map[string]sampleTypeScenario{
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float: {
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sampleType: sampleMetricTypeFloat,
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appendFunc: func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error) {
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s := sample{t: ts, f: float64(value)}
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ref, err := appender.Append(0, lbls, ts, s.f)
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return ref, s, err
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},
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sampleFunc: func(ts, value int64) sample {
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return sample{t: ts, f: float64(value)}
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},
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},
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//intHistogram: {
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// sampleType: sampleMetricTypeHistogram,
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// appendFunc: func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error) {
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// s := sample{t: ts, h: tsdbutil.GenerateTestHistogram(int(value))}
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// ref, err := appender.AppendHistogram(0, lbls, ts, s.h, nil)
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// return ref, s, err
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// },
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// sampleFunc: func(ts, value int64) sample {
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// return sample{t: ts, h: tsdbutil.GenerateTestHistogram(int(value))}
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// },
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//},
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//floatHistogram: {
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// sampleType: sampleMetricTypeHistogram,
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// appendFunc: func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error) {
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// s := sample{t: ts, fh: tsdbutil.GenerateTestFloatHistogram(int(value))}
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// ref, err := appender.AppendHistogram(0, lbls, ts, nil, s.fh)
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// return ref, s, err
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// },
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// sampleFunc: func(ts, value int64) sample {
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// return sample{t: ts, fh: tsdbutil.GenerateTestFloatHistogram(int(value))}
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// },
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//},
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//gaugeIntHistogram: {
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// sampleType: sampleMetricTypeHistogram,
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// appendFunc: func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error) {
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// s := sample{t: ts, h: tsdbutil.GenerateTestGaugeHistogram(int(value))}
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// ref, err := appender.AppendHistogram(0, lbls, ts, s.h, nil)
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// return ref, s, err
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// },
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// sampleFunc: func(ts, value int64) sample {
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// return sample{t: ts, h: tsdbutil.GenerateTestGaugeHistogram(int(value))}
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// },
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//},
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//gaugeFloatHistogram: {
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// sampleType: sampleMetricTypeHistogram,
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// appendFunc: func(appender storage.Appender, lbls labels.Labels, ts, value int64) (storage.SeriesRef, sample, error) {
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// s := sample{t: ts, fh: tsdbutil.GenerateTestGaugeFloatHistogram(int(value))}
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// ref, err := appender.AppendHistogram(0, lbls, ts, nil, s.fh)
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// return ref, s, err
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// },
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// sampleFunc: func(ts, value int64) sample {
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// return sample{t: ts, fh: tsdbutil.GenerateTestGaugeFloatHistogram(int(value))}
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// },
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//},
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}
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// requireEqualSamples checks that the actual series are equal to the expected ones. It ignores the counter reset hints for histograms.
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func requireEqualSamples(t *testing.T, expected, actual map[string][]chunks.Sample, ignoreCounterResets bool) {
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for name, expectedItem := range expected {
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actualItem, ok := actual[name]
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require.True(t, ok, "Expected series %s not found", name)
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compareSamples(t, name, expectedItem, actualItem, ignoreCounterResets)
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}
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for name := range actual {
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_, ok := expected[name]
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require.True(t, ok, "Unexpected series %s", name)
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}
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}
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func requireEqualOOOSamples(t *testing.T, expectedSamples int, db *DB) {
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require.GreaterOrEqual(t, float64(expectedSamples),
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prom_testutil.ToFloat64(db.head.metrics.outOfOrderSamplesAppended.WithLabelValues(sampleMetricTypeFloat))+
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prom_testutil.ToFloat64(db.head.metrics.outOfOrderSamplesAppended.WithLabelValues(sampleMetricTypeHistogram)),
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"number of ooo appended samples mismatch")
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}
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func compareSamples(t *testing.T, name string, expected, actual []chunks.Sample, ignoreCounterResets bool) {
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require.Equal(t, len(expected), len(actual), "Length not expected for %s", name)
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for i, s := range expected {
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expectedSample := s
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actualSample := actual[i]
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require.Equal(t, expectedSample.T(), expectedSample.T(), "Different timestamps for %s[%d]", name, i)
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require.Equal(t, expectedSample.Type().String(), actualSample.Type().String(), "Different types for %s[%d] at ts %d", name, i, expectedSample.T())
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switch {
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case s.H() != nil:
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{
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expectedHist := expectedSample.H()
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actualHist := actualSample.H()
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if ignoreCounterResets && expectedHist.CounterResetHint != histogram.GaugeType {
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expectedHist.CounterResetHint = histogram.UnknownCounterReset
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actualHist.CounterResetHint = histogram.UnknownCounterReset
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} else {
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require.Equal(t, expectedHist.CounterResetHint, actualHist.CounterResetHint, "Sample header doesn't match for %s[%d] at ts %d, expected: %s, actual: %s", name, i, expectedSample.T(), counterResetAsString(expectedHist.CounterResetHint), counterResetAsString(actualHist.CounterResetHint))
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}
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require.Equal(t, expectedHist, actualHist, "Sample doesn't match for %s[%d] at ts %d", name, i, expectedSample.T())
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}
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case s.FH() != nil:
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{
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expectedHist := expectedSample.FH()
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actualHist := actualSample.FH()
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if ignoreCounterResets {
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expectedHist.CounterResetHint = histogram.UnknownCounterReset
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actualHist.CounterResetHint = histogram.UnknownCounterReset
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} else {
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require.Equal(t, expectedHist.CounterResetHint, actualHist.CounterResetHint, "Sample header doesn't match for %s[%d] at ts %d, expected: %s, actual: %s", name, i, expectedSample.T(), counterResetAsString(expectedHist.CounterResetHint), counterResetAsString(actualHist.CounterResetHint))
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}
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require.Equal(t, expectedHist, actualHist, "Sample doesn't match for %s[%d] at ts %d", name, i, expectedSample.T())
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}
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default:
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require.Equal(t, expectedSample, actualSample, "Sample doesn't match for %s[%d] at ts %d", name, i, expectedSample.T())
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}
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}
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}
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func counterResetAsString(h histogram.CounterResetHint) string {
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switch h {
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case histogram.UnknownCounterReset:
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return "UnknownCounterReset"
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case histogram.CounterReset:
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return "CounterReset"
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case histogram.NotCounterReset:
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return "NotCounterReset"
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case histogram.GaugeType:
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return "GaugeType"
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}
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panic("Unexpected counter reset type")
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}
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func samplesFromIterator(t testing.TB, it chunkenc.Iterator) []chunks.Sample {
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var samples []chunks.Sample
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for typ := it.Next(); typ != chunkenc.ValNone; typ = it.Next() {
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switch typ {
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case chunkenc.ValFloat:
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ts, val := it.At()
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samples = append(samples, sample{t: ts, f: val})
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case chunkenc.ValHistogram:
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ts, val := it.AtHistogram(nil)
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samples = append(samples, sample{t: ts, h: val})
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case chunkenc.ValFloatHistogram:
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ts, val := it.AtFloatHistogram(nil)
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samples = append(samples, sample{t: ts, fh: val})
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default:
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t.Fatalf("unknown sample value type %s", typ)
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}
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}
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return samples
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}
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