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prometheus/storage/merge_test.go

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// Copyright 2020 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package storage
import (
"context"
"errors"
"fmt"
"math"
"sort"
"sync"
"testing"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/model/histogram"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/tsdb/chunkenc"
"github.com/prometheus/prometheus/tsdb/chunks"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/util/annotations"
)
func TestMergeQuerierWithChainMerger(t *testing.T) {
for _, tc := range []struct {
name string
primaryQuerierSeries []Series
querierSeries [][]Series
extraQueriers []Querier
expected SeriesSet
}{
{
name: "one primary querier with no series",
primaryQuerierSeries: []Series{},
expected: NewMockSeriesSet(),
},
{
name: "one secondary querier with no series",
querierSeries: [][]Series{{}},
expected: NewMockSeriesSet(),
},
{
name: "many secondary queriers with no series",
querierSeries: [][]Series{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockSeriesSet(),
},
{
name: "mix of queriers with no series",
primaryQuerierSeries: []Series{},
querierSeries: [][]Series{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockSeriesSet(),
},
// Test rest of cases on secondary queriers as the different between primary vs secondary is just error handling.
{
name: "one querier, two series",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
),
},
{
name: "two queriers, one different series each",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
}, {
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
),
},
{
name: "two time unsorted queriers, two series each",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "five queriers, only two queriers have two time unsorted series each",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queriers, only two queriers have two time unsorted series each, with 3 noop and one nil querier together",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
extraQueriers: []Querier{NoopQuerier(), NoopQuerier(), nil, NoopQuerier()},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queriers, with two series, one is overlapping",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 21}, fSample{3, 31}, fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 22}, fSample{3, 32}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 21}, fSample{3, 31}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queries, one with NaN samples series",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}),
}, {
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{1, 1}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}, fSample{1, 1}}),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
var p []Querier
if tc.primaryQuerierSeries != nil {
p = append(p, &mockQuerier{toReturn: tc.primaryQuerierSeries})
}
var qs []Querier
for _, in := range tc.querierSeries {
qs = append(qs, &mockQuerier{toReturn: in})
}
qs = append(qs, tc.extraQueriers...)
mergedQuerier := NewMergeQuerier(p, qs, ChainedSeriesMerge).Select(context.Background(), false, nil)
// Get all merged series upfront to make sure there are no incorrectly retained shared
// buffers causing bugs.
var mergedSeries []Series
for mergedQuerier.Next() {
mergedSeries = append(mergedSeries, mergedQuerier.At())
}
require.NoError(t, mergedQuerier.Err())
for _, actualSeries := range mergedSeries {
require.True(t, tc.expected.Next(), "Expected Next() to be true")
expectedSeries := tc.expected.At()
require.Equal(t, expectedSeries.Labels(), actualSeries.Labels())
expSmpl, expErr := ExpandSamples(expectedSeries.Iterator(nil), nil)
actSmpl, actErr := ExpandSamples(actualSeries.Iterator(nil), nil)
require.Equal(t, expErr, actErr)
require.Equal(t, expSmpl, actSmpl)
}
require.False(t, tc.expected.Next(), "Expected Next() to be false")
})
}
}
func TestMergeChunkQuerierWithNoVerticalChunkSeriesMerger(t *testing.T) {
for _, tc := range []struct {
name string
primaryChkQuerierSeries []ChunkSeries
chkQuerierSeries [][]ChunkSeries
extraQueriers []ChunkQuerier
expected ChunkSeriesSet
}{
{
name: "one primary querier with no series",
primaryChkQuerierSeries: []ChunkSeries{},
expected: NewMockChunkSeriesSet(),
},
{
name: "one secondary querier with no series",
chkQuerierSeries: [][]ChunkSeries{{}},
expected: NewMockChunkSeriesSet(),
},
{
name: "many secondary queriers with no series",
chkQuerierSeries: [][]ChunkSeries{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockChunkSeriesSet(),
},
{
name: "mix of queriers with no series",
primaryChkQuerierSeries: []ChunkSeries{},
chkQuerierSeries: [][]ChunkSeries{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockChunkSeriesSet(),
},
// Test rest of cases on secondary queriers as the different between primary vs secondary is just error handling.
{
name: "one querier, two series",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
),
},
{
name: "two secondaries, one different series each",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
),
},
{
name: "two secondaries, two not in time order series each",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "five secondaries, only two have two not in time order series each",
chkQuerierSeries: [][]ChunkSeries{{}, {}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}, {}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "two secondaries, with two not in time order series each, with 3 noop queries and one nil together",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}},
extraQueriers: []ChunkQuerier{NoopChunkedQuerier(), NoopChunkedQuerier(), nil, NoopChunkedQuerier()},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "two queries, one with NaN samples series",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{1, 1}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}, []chunks.Sample{fSample{1, 1}}),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
var p []ChunkQuerier
if tc.primaryChkQuerierSeries != nil {
p = append(p, &mockChunkQuerier{toReturn: tc.primaryChkQuerierSeries})
}
var qs []ChunkQuerier
for _, in := range tc.chkQuerierSeries {
qs = append(qs, &mockChunkQuerier{toReturn: in})
}
qs = append(qs, tc.extraQueriers...)
merged := NewMergeChunkQuerier(p, qs, NewCompactingChunkSeriesMerger(nil)).Select(context.Background(), false, nil)
for merged.Next() {
require.True(t, tc.expected.Next(), "Expected Next() to be true")
actualSeries := merged.At()
expectedSeries := tc.expected.At()
require.Equal(t, expectedSeries.Labels(), actualSeries.Labels())
expChks, expErr := ExpandChunks(expectedSeries.Iterator(nil))
actChks, actErr := ExpandChunks(actualSeries.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
}
require.NoError(t, merged.Err())
require.False(t, tc.expected.Next(), "Expected Next() to be false")
})
}
}
func histogramSample(ts int64, hint histogram.CounterResetHint) hSample {
h := tsdbutil.GenerateTestHistogram(int(ts + 1))
h.CounterResetHint = hint
return hSample{t: ts, h: h}
}
func floatHistogramSample(ts int64, hint histogram.CounterResetHint) fhSample {
fh := tsdbutil.GenerateTestFloatHistogram(int(ts + 1))
fh.CounterResetHint = hint
return fhSample{t: ts, fh: fh}
}
// Shorthands for counter reset hints.
const (
uk = histogram.UnknownCounterReset
cr = histogram.CounterReset
nr = histogram.NotCounterReset
ga = histogram.GaugeType
)
func TestCompactingChunkSeriesMerger(t *testing.T) {
m := NewCompactingChunkSeriesMerger(ChainedSeriesMerge)
// histogramSample returns a histogram that is unique to the ts.
histogramSample := func(ts int64) hSample {
return histogramSample(ts, uk)
}
floatHistogramSample := func(ts int64) fhSample {
return floatHistogramSample(ts, uk)
}
for _, tc := range []struct {
name string
input []ChunkSeries
expected ChunkSeries
}{
{
name: "single empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "single series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
{
name: "two empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "two non overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}, []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{7, 7}, fSample{8, 8}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two duplicated",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
{
name: "three overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{4, 4}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}, fSample{5, 5}, fSample{6, 6}}),
},
{
name: "three in chained overlap",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{4, 4}, fSample{6, 66}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{6, 6}, fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}, fSample{5, 5}, fSample{6, 66}, fSample{10, 10}}),
},
{
name: "three in chained overlap complex",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{0, 0}, fSample{2, 2}, fSample{5, 5}, fSample{10, 10}, fSample{15, 15}, fSample{18, 18}, fSample{20, 20}, fSample{25, 25}, fSample{26, 26}, fSample{30, 30}},
[]chunks.Sample{fSample{31, 31}, fSample{35, 35}},
),
},
{
name: "110 overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 110)), // [0 - 110)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 50)), // [60 - 110)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 110),
),
},
{
name: "150 overlapping samples, split chunk",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 90)), // [0 - 90)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 90)), // [90 - 150)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 120),
chunks.GenerateSamples(120, 30),
),
},
{
name: "histogram chunks overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(0), histogramSample(5)}, []chunks.Sample{histogramSample(10), histogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(2), histogramSample(20)}, []chunks.Sample{histogramSample(25), histogramSample(30)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(18), histogramSample(26)}, []chunks.Sample{histogramSample(31), histogramSample(35)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{histogramSample(0), histogramSample(2), histogramSample(5), histogramSample(10), histogramSample(15), histogramSample(18), histogramSample(20), histogramSample(25), histogramSample(26), histogramSample(30)},
[]chunks.Sample{histogramSample(31), histogramSample(35)},
),
},
{
name: "histogram chunks overlapping with float chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(0), histogramSample(5)}, []chunks.Sample{histogramSample(10), histogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{12, 12}}, []chunks.Sample{fSample{14, 14}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{histogramSample(0)},
[]chunks.Sample{fSample{1, 1}},
[]chunks.Sample{histogramSample(5), histogramSample(10)},
[]chunks.Sample{fSample{12, 12}, fSample{14, 14}},
[]chunks.Sample{histogramSample(15)},
),
},
{
name: "float histogram chunks overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(2), floatHistogramSample(20)}, []chunks.Sample{floatHistogramSample(25), floatHistogramSample(30)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(18), floatHistogramSample(26)}, []chunks.Sample{floatHistogramSample(31), floatHistogramSample(35)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0), floatHistogramSample(2), floatHistogramSample(5), floatHistogramSample(10), floatHistogramSample(15), floatHistogramSample(18), floatHistogramSample(20), floatHistogramSample(25), floatHistogramSample(26), floatHistogramSample(30)},
[]chunks.Sample{floatHistogramSample(31), floatHistogramSample(35)},
),
},
{
name: "float histogram chunks overlapping with float chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{12, 12}}, []chunks.Sample{fSample{14, 14}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0)},
[]chunks.Sample{fSample{1, 1}},
[]chunks.Sample{floatHistogramSample(5), floatHistogramSample(10)},
[]chunks.Sample{fSample{12, 12}, fSample{14, 14}},
[]chunks.Sample{floatHistogramSample(15)},
),
},
{
name: "float histogram chunks overlapping with histogram chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(1), histogramSample(12)}, []chunks.Sample{histogramSample(14)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0)},
[]chunks.Sample{histogramSample(1)},
[]chunks.Sample{floatHistogramSample(5), floatHistogramSample(10)},
[]chunks.Sample{histogramSample(12), histogramSample(14)},
[]chunks.Sample{floatHistogramSample(15)},
),
},
} {
t.Run(tc.name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
actSamples := chunks.ChunkMetasToSamples(actChks)
expSamples := chunks.ChunkMetasToSamples(expChks)
require.Equal(t, expSamples, actSamples)
})
}
}
func TestCompactingChunkSeriesMergerHistogramCounterResetHint(t *testing.T) {
m := NewCompactingChunkSeriesMerger(ChainedSeriesMerge)
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []ChunkSeries
expected ChunkSeries
}{
"histogram counter reset hint kept in single series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
"histogram not counter reset hint kept in single series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
"histogram counter reset hint kept in multiple equal series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
"histogram not counter reset hint kept in multiple equal series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
"histogram counter reset hint dropped from differing series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, uk), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
"histogram counter not reset hint dropped from differing series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, uk), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
actSamples := chunks.ChunkMetasToSamples(actChks)
expSamples := chunks.ChunkMetasToSamples(expChks)
require.Equal(t, expSamples, actSamples)
})
}
}
}
func TestConcatenatingChunkSeriesMerger(t *testing.T) {
m := NewConcatenatingChunkSeriesMerger()
for _, tc := range []struct {
name string
input []ChunkSeries
expected ChunkSeries
}{
{
name: "single empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "single series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
{
name: "two empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil, nil),
},
{
name: "two non overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}, []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}},
[]chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}},
),
},
{
name: "two duplicated",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
),
},
{
name: "three overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{4, 4}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}},
[]chunks.Sample{fSample{0, 0}, fSample{4, 4}},
),
},
{
name: "three in chained overlap",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{4, 4}, fSample{6, 66}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{6, 6}, fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{4, 4}, fSample{6, 66}},
[]chunks.Sample{fSample{6, 6}, fSample{10, 10}},
),
},
{
name: "three in chained overlap complex",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}},
[]chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}},
[]chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}},
),
},
{
name: "110 overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 110)), // [0 - 110)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 50)), // [60 - 110)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 110),
chunks.GenerateSamples(60, 50),
),
},
{
name: "150 overlapping samples, simply concatenated and no splits",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 90)), // [0 - 90)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 90)), // [90 - 150)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 90),
chunks.GenerateSamples(60, 90),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
})
}
}
func TestConcatenatingChunkIterator(t *testing.T) {
chunk1, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 1, f: 10}})
require.NoError(t, err)
chunk2, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 2, f: 20}})
require.NoError(t, err)
chunk3, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 3, f: 30}})
require.NoError(t, err)
testError := errors.New("something went wrong")
testCases := map[string]struct {
iterators []chunks.Iterator
expectedChunks []chunks.Meta
expectedError error
}{
"many successful iterators": {
iterators: []chunks.Iterator{
NewListChunkSeriesIterator(chunk1, chunk2),
NewListChunkSeriesIterator(chunk3),
},
expectedChunks: []chunks.Meta{chunk1, chunk2, chunk3},
},
"single failing iterator": {
iterators: []chunks.Iterator{
errChunksIterator{err: testError},
},
expectedError: testError,
},
"some failing and some successful iterators": {
iterators: []chunks.Iterator{
NewListChunkSeriesIterator(chunk1, chunk2),
errChunksIterator{err: testError},
NewListChunkSeriesIterator(chunk3),
},
expectedChunks: []chunks.Meta{chunk1, chunk2}, // Should stop before advancing to last iterator.
expectedError: testError,
},
}
for name, testCase := range testCases {
t.Run(name, func(t *testing.T) {
it := concatenatingChunkIterator{iterators: testCase.iterators}
var chks []chunks.Meta
for it.Next() {
chks = append(chks, it.At())
}
require.Equal(t, testCase.expectedChunks, chks)
if testCase.expectedError == nil {
require.NoError(t, it.Err())
} else {
require.EqualError(t, it.Err(), testCase.expectedError.Error())
}
})
}
}
type mockQuerier struct {
mtx sync.Mutex
toReturn []Series // Response for Select.
closed bool
labelNamesCalls int
labelNamesRequested []labelNameRequest
sortedSeriesRequested []bool
resp []string // Response for LabelNames and LabelValues; turned into Select response if toReturn is not supplied.
warnings annotations.Annotations
err error
}
type labelNameRequest struct {
name string
matchers []*labels.Matcher
}
type seriesByLabel []Series
func (a seriesByLabel) Len() int { return len(a) }
func (a seriesByLabel) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a seriesByLabel) Less(i, j int) bool { return labels.Compare(a[i].Labels(), a[j].Labels()) < 0 }
func (m *mockQuerier) Select(_ context.Context, sortSeries bool, _ *SelectHints, _ ...*labels.Matcher) SeriesSet {
m.mtx.Lock()
defer m.mtx.Unlock()
m.sortedSeriesRequested = append(m.sortedSeriesRequested, sortSeries)
var ret []Series
if len(m.toReturn) > 0 {
ret = make([]Series, len(m.toReturn))
copy(ret, m.toReturn)
} else if len(m.resp) > 0 {
ret = make([]Series, 0, len(m.resp))
for _, l := range m.resp {
ret = append(ret, NewListSeries(labels.FromStrings("test", l), nil))
}
}
if sortSeries {
sort.Sort(seriesByLabel(ret))
}
return &mockSeriesSet{idx: -1, series: ret, warnings: m.warnings, err: m.err}
}
func (m *mockQuerier) LabelValues(_ context.Context, name string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesRequested = append(m.labelNamesRequested, labelNameRequest{
name: name,
matchers: matchers,
})
m.mtx.Unlock()
return m.resp, m.warnings, m.err
}
func (m *mockQuerier) LabelNames(context.Context, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesCalls++
m.mtx.Unlock()
return m.resp, m.warnings, m.err
}
func (m *mockQuerier) Close() error {
m.closed = true
return nil
}
type mockChunkQuerier struct {
LabelQuerier
toReturn []ChunkSeries
}
type chunkSeriesByLabel []ChunkSeries
func (a chunkSeriesByLabel) Len() int { return len(a) }
func (a chunkSeriesByLabel) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a chunkSeriesByLabel) Less(i, j int) bool {
return labels.Compare(a[i].Labels(), a[j].Labels()) < 0
}
func (m *mockChunkQuerier) Select(_ context.Context, sortSeries bool, _ *SelectHints, _ ...*labels.Matcher) ChunkSeriesSet {
cpy := make([]ChunkSeries, len(m.toReturn))
copy(cpy, m.toReturn)
if sortSeries {
sort.Sort(chunkSeriesByLabel(cpy))
}
return NewMockChunkSeriesSet(cpy...)
}
type mockSeriesSet struct {
idx int
series []Series
warnings annotations.Annotations
err error
}
func NewMockSeriesSet(series ...Series) SeriesSet {
return &mockSeriesSet{
idx: -1,
series: series,
}
}
func (m *mockSeriesSet) Next() bool {
if m.err != nil {
return false
}
m.idx++
return m.idx < len(m.series)
}
func (m *mockSeriesSet) At() Series { return m.series[m.idx] }
func (m *mockSeriesSet) Err() error { return m.err }
func (m *mockSeriesSet) Warnings() annotations.Annotations { return m.warnings }
type mockChunkSeriesSet struct {
idx int
series []ChunkSeries
}
func NewMockChunkSeriesSet(series ...ChunkSeries) ChunkSeriesSet {
return &mockChunkSeriesSet{
idx: -1,
series: series,
}
}
func (m *mockChunkSeriesSet) Next() bool {
m.idx++
return m.idx < len(m.series)
}
func (m *mockChunkSeriesSet) At() ChunkSeries { return m.series[m.idx] }
func (m *mockChunkSeriesSet) Err() error { return nil }
func (m *mockChunkSeriesSet) Warnings() annotations.Annotations { return nil }
func TestChainSampleIterator(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64) chunks.Sample{
"float": func(ts int64) chunks.Sample { return fSample{ts, float64(ts)} },
"histogram": func(ts int64) chunks.Sample { return histogramSample(ts, uk) },
"float histogram": func(ts int64) chunks.Sample { return floatHistogramSample(ts, uk) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(1), sampleFunc(4)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(5)}),
},
expected: []chunks.Sample{
sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3), sampleFunc(4), sampleFunc(5),
},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(2)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
NewListSeriesIterator(samples{}),
NewListSeriesIterator(samples{}),
NewListSeriesIterator(samples{}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual, err := ExpandSamples(merged, nil)
require.NoError(t, err)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorHistogramCounterResetHint(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, uk)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, cr), sampleFunc(2, uk)},
},
"single iterator gauge": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga)}),
},
expected: []chunks.Sample{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga)},
},
"overlapping iterators gauge": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga), sampleFunc(4, ga)}),
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(3, ga), sampleFunc(5, ga)}),
},
expected: []chunks.Sample{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga), sampleFunc(3, ga), sampleFunc(4, ga), sampleFunc(5, ga)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, uk), sampleFunc(3, cr)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(3, uk), sampleFunc(5, cr)}),
NewListSeriesIterator(samples{sampleFunc(1, uk), sampleFunc(2, cr), sampleFunc(4, cr)}),
},
expected: []chunks.Sample{
sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, cr), sampleFunc(3, uk), sampleFunc(4, uk), sampleFunc(5, uk),
},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, cr)}),
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, cr)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, uk)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual, err := ExpandSamples(merged, nil)
require.NoError(t, err)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorSeek(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64) chunks.Sample{
"float": func(ts int64) chunks.Sample { return fSample{ts, float64(ts)} },
"histogram": func(ts int64) chunks.Sample { return histogramSample(ts, uk) },
"float histogram": func(ts int64) chunks.Sample { return floatHistogramSample(ts, uk) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
seek int64
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1), sampleFunc(2)}),
},
seek: 1,
expected: []chunks.Sample{sampleFunc(1), sampleFunc(2)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2), sampleFunc(3)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(1), sampleFunc(4)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(5)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2), sampleFunc(3), sampleFunc(4), sampleFunc(5)},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(2), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1), sampleFunc(2)}),
},
seek: 0,
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual := []chunks.Sample{}
switch merged.Seek(tc.seek) {
case chunkenc.ValFloat:
t, f := merged.At()
actual = append(actual, fSample{t, f})
case chunkenc.ValHistogram:
t, h := merged.AtHistogram(nil)
actual = append(actual, hSample{t, h})
case chunkenc.ValFloatHistogram:
t, fh := merged.AtFloatHistogram(nil)
actual = append(actual, fhSample{t, fh})
}
s, err := ExpandSamples(merged, nil)
require.NoError(t, err)
actual = append(actual, s...)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorSeekFailingIterator(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
errIterator{errors.New("something went wrong")},
})
require.Equal(t, chunkenc.ValNone, merged.Seek(0))
require.EqualError(t, merged.Err(), "something went wrong")
}
func TestChainSampleIteratorNextImmediatelyFailingIterator(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
errIterator{errors.New("something went wrong")},
})
require.Equal(t, chunkenc.ValNone, merged.Next())
require.EqualError(t, merged.Err(), "something went wrong")
// Next() does some special handling for the first iterator, so make sure it handles the first iterator returning an error too.
merged = ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
errIterator{errors.New("something went wrong")},
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
})
require.Equal(t, chunkenc.ValNone, merged.Next())
require.EqualError(t, merged.Err(), "something went wrong")
}
func TestChainSampleIteratorSeekHistogramCounterResetHint(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
seek int64
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, uk)}),
},
seek: 1,
expected: []chunks.Sample{sampleFunc(1, uk), sampleFunc(2, uk)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2, uk), sampleFunc(3, cr)},
},
"non overlapping iterators seek to internal reset": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
seek: 3,
expected: []chunks.Sample{sampleFunc(3, uk)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual := []chunks.Sample{}
switch merged.Seek(tc.seek) {
case chunkenc.ValFloat:
t, f := merged.At()
actual = append(actual, fSample{t, f})
case chunkenc.ValHistogram:
t, h := merged.AtHistogram(nil)
actual = append(actual, hSample{t, h})
case chunkenc.ValFloatHistogram:
t, fh := merged.AtFloatHistogram(nil)
actual = append(actual, fhSample{t, fh})
}
s, err := ExpandSamples(merged, nil)
require.NoError(t, err)
actual = append(actual, s...)
require.Equal(t, tc.expected, actual)
})
}
}
}
func makeSeries(numSeries, numSamples int) []Series {
series := []Series{}
for j := 0; j < numSeries; j++ {
labels := labels.FromStrings("foo", fmt.Sprintf("bar%d", j))
samples := []chunks.Sample{}
for k := 0; k < numSamples; k++ {
samples = append(samples, fSample{t: int64(k), f: float64(k)})
}
series = append(series, NewListSeries(labels, samples))
}
return series
}
func makeMergeSeriesSet(serieses [][]Series) SeriesSet {
seriesSets := make([]genericSeriesSet, len(serieses))
for i, s := range serieses {
seriesSets[i] = &genericSeriesSetAdapter{NewMockSeriesSet(s...)}
}
return &seriesSetAdapter{newGenericMergeSeriesSet(seriesSets, 0, (&seriesMergerAdapter{VerticalSeriesMergeFunc: ChainedSeriesMerge}).Merge)}
}
func benchmarkDrain(b *testing.B, makeSeriesSet func() SeriesSet) {
var err error
var t int64
var v float64
var iter chunkenc.Iterator
for n := 0; n < b.N; n++ {
seriesSet := makeSeriesSet()
for seriesSet.Next() {
iter = seriesSet.At().Iterator(iter)
for iter.Next() == chunkenc.ValFloat {
t, v = iter.At()
}
err = iter.Err()
}
require.NoError(b, err)
require.NotEqual(b, t, v) // To ensure the inner loop doesn't get optimised away.
}
}
func BenchmarkNoMergeSeriesSet_100_100(b *testing.B) {
series := makeSeries(100, 100)
benchmarkDrain(b, func() SeriesSet { return NewMockSeriesSet(series...) })
}
func BenchmarkMergeSeriesSet(b *testing.B) {
for _, bm := range []struct {
numSeriesSets, numSeries, numSamples int
}{
{1, 100, 100},
{10, 100, 100},
{100, 100, 100},
} {
serieses := [][]Series{}
for i := 0; i < bm.numSeriesSets; i++ {
serieses = append(serieses, makeSeries(bm.numSeries, bm.numSamples))
}
b.Run(fmt.Sprintf("%d_%d_%d", bm.numSeriesSets, bm.numSeries, bm.numSamples), func(b *testing.B) {
benchmarkDrain(b, func() SeriesSet { return makeMergeSeriesSet(serieses) })
})
}
}
func BenchmarkMergeLabelValuesWithLimit(b *testing.B) {
var queriers []genericQuerier
for i := 0; i < 5; i++ {
var lbls []string
for j := 0; j < 100000; j++ {
lbls = append(lbls, fmt.Sprintf("querier_%d_label_%d", i, j))
}
q := &mockQuerier{resp: lbls}
queriers = append(queriers, newGenericQuerierFrom(q))
}
mergeQuerier := &mergeGenericQuerier{
queriers: queriers, // Assume querying 5 blocks.
mergeFn: func(l ...Labels) Labels {
return l[0]
},
}
b.Run("benchmark", func(b *testing.B) {
ctx := context.Background()
hints := &LabelHints{
Limit: 1000,
}
mergeQuerier.LabelValues(ctx, "name", hints)
})
}
func visitMockQueriers(t *testing.T, qr Querier, f func(t *testing.T, q *mockQuerier)) int {
count := 0
switch x := qr.(type) {
case *mockQuerier:
count++
f(t, x)
case *querierAdapter:
count += visitMockQueriersInGenericQuerier(t, x.genericQuerier, f)
}
return count
}
func visitMockQueriersInGenericQuerier(t *testing.T, g genericQuerier, f func(t *testing.T, q *mockQuerier)) int {
count := 0
switch x := g.(type) {
case *mergeGenericQuerier:
for _, q := range x.queriers {
count += visitMockQueriersInGenericQuerier(t, q, f)
}
case *genericQuerierAdapter:
// Visitor for chunkQuerier not implemented.
count += visitMockQueriers(t, x.q, f)
case *secondaryQuerier:
count += visitMockQueriersInGenericQuerier(t, x.genericQuerier, f)
}
return count
}
func TestMergeQuerierWithSecondaries_ErrorHandling(t *testing.T) {
var (
errStorage = errors.New("storage error")
warnStorage = errors.New("storage warning")
ctx = context.Background()
)
for _, tcase := range []struct {
name string
primaries []Querier
secondaries []Querier
limit int
expectedSelectsSeries []labels.Labels
expectedLabels []string
expectedWarnings annotations.Annotations
expectedErrs [4]error
}{
{
name: "one successful primary querier",
primaries: []Querier{&mockQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil}},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
},
expectedLabels: []string{"a", "b"},
},
{
name: "multiple successful primary queriers",
primaries: []Querier{
&mockQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil},
&mockQuerier{resp: []string{"b", "c"}, warnings: nil, err: nil},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"a", "b", "c"},
},
{
name: "one failed primary querier",
primaries: []Querier{&mockQuerier{warnings: nil, err: errStorage}},
expectedErrs: [4]error{errStorage, errStorage, errStorage, errStorage},
},
{
name: "one successful primary querier with successful secondaries",
primaries: []Querier{
&mockQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: nil},
&mockQuerier{resp: []string{"c"}, warnings: nil, err: nil},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"a", "b", "c"},
},
{
name: "one successful primary querier with empty response and successful secondaries",
primaries: []Querier{
&mockQuerier{resp: []string{}, warnings: nil, err: nil},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: nil},
&mockQuerier{resp: []string{"c"}, warnings: nil, err: nil},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"b", "c"},
},
{
name: "one failed primary querier with successful secondaries",
primaries: []Querier{
&mockQuerier{warnings: nil, err: errStorage},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: nil},
&mockQuerier{resp: []string{"c"}, warnings: nil, err: nil},
},
expectedErrs: [4]error{errStorage, errStorage, errStorage, errStorage},
},
{
name: "nil primary querier with failed secondary",
primaries: nil,
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: errStorage},
},
expectedLabels: []string{},
expectedWarnings: annotations.New().Add(errStorage),
},
{
name: "nil primary querier with two failed secondaries",
primaries: nil,
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: errStorage},
&mockQuerier{resp: []string{"c"}, warnings: nil, err: errStorage},
},
expectedLabels: []string{},
expectedWarnings: annotations.New().Add(errStorage),
},
{
name: "one successful primary querier with failed secondaries",
primaries: []Querier{
&mockQuerier{resp: []string{"a"}, warnings: nil, err: nil},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: nil, err: errStorage},
&mockQuerier{resp: []string{"c"}, warnings: nil, err: errStorage},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
},
expectedLabels: []string{"a"},
expectedWarnings: annotations.New().Add(errStorage),
},
{
name: "successful queriers with warnings",
primaries: []Querier{
&mockQuerier{resp: []string{"a"}, warnings: annotations.New().Add(warnStorage), err: nil},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b"}, warnings: annotations.New().Add(warnStorage), err: nil},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
},
expectedLabels: []string{"a", "b"},
expectedWarnings: annotations.New().Add(warnStorage),
},
{
name: "successful queriers with limit",
primaries: []Querier{
&mockQuerier{resp: []string{"a", "d"}, warnings: annotations.New().Add(warnStorage), err: nil},
},
secondaries: []Querier{
&mockQuerier{resp: []string{"b", "c"}, warnings: annotations.New().Add(warnStorage), err: nil},
},
limit: 2,
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
},
expectedLabels: []string{"a", "b"},
expectedWarnings: annotations.New().Add(warnStorage),
},
} {
var labelHints *LabelHints
var selectHints *SelectHints
if tcase.limit > 0 {
labelHints = &LabelHints{
Limit: tcase.limit,
}
selectHints = &SelectHints{
Limit: tcase.limit,
}
}
t.Run(tcase.name, func(t *testing.T) {
q := NewMergeQuerier(tcase.primaries, tcase.secondaries, func(s ...Series) Series { return s[0] })
t.Run("Select", func(t *testing.T) {
res := q.Select(context.Background(), false, selectHints)
var lbls []labels.Labels
for res.Next() {
lbls = append(lbls, res.At().Labels())
}
require.Subset(t, tcase.expectedWarnings, res.Warnings())
require.Equal(t, tcase.expectedErrs[0], res.Err())
require.ErrorIs(t, res.Err(), tcase.expectedErrs[0], "expected error doesn't match")
require.Equal(t, tcase.expectedSelectsSeries, lbls)
n := visitMockQueriers(t, q, func(t *testing.T, m *mockQuerier) {
// Single queries should be unsorted; merged queries sorted.
exp := len(tcase.primaries)+len(tcase.secondaries) > 1
require.Equal(t, []bool{exp}, m.sortedSeriesRequested)
})
// Check we visited all queriers.
require.Equal(t, len(tcase.primaries)+len(tcase.secondaries), n)
})
t.Run("LabelNames", func(t *testing.T) {
res, w, err := q.LabelNames(ctx, labelHints)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[1], "expected error doesn't match")
requireEqualSlice(t, tcase.expectedLabels, res)
if err != nil {
return
}
visitMockQueriers(t, q, func(t *testing.T, m *mockQuerier) {
require.Equal(t, 1, m.labelNamesCalls)
})
})
t.Run("LabelValues", func(t *testing.T) {
res, w, err := q.LabelValues(ctx, "test", labelHints)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[2], "expected error doesn't match")
requireEqualSlice(t, tcase.expectedLabels, res)
if err != nil {
return
}
visitMockQueriers(t, q, func(t *testing.T, m *mockQuerier) {
require.Equal(t, []labelNameRequest{{name: "test"}}, m.labelNamesRequested)
})
})
t.Run("LabelValuesWithMatchers", func(t *testing.T) {
matcher := labels.MustNewMatcher(labels.MatchEqual, "otherLabel", "someValue")
res, w, err := q.LabelValues(ctx, "test2", labelHints, matcher)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[3], "expected error doesn't match")
requireEqualSlice(t, tcase.expectedLabels, res)
if err != nil {
return
}
visitMockQueriers(t, q, func(t *testing.T, m *mockQuerier) {
require.Equal(t, []labelNameRequest{
{name: "test"},
{name: "test2", matchers: []*labels.Matcher{matcher}},
}, m.labelNamesRequested)
})
})
})
}
}
// Check slice but ignore difference between nil and empty.
func requireEqualSlice[T any](t require.TestingT, a, b []T, msgAndArgs ...interface{}) {
if len(a) == 0 {
require.Empty(t, b, msgAndArgs...)
} else {
require.Equal(t, a, b, msgAndArgs...)
}
}
type errIterator struct {
err error
}
func (e errIterator) Next() chunkenc.ValueType {
return chunkenc.ValNone
}
func (e errIterator) Seek(t int64) chunkenc.ValueType {
return chunkenc.ValNone
}
func (e errIterator) At() (int64, float64) {
return 0, 0
}
func (e errIterator) AtHistogram(*histogram.Histogram) (int64, *histogram.Histogram) {
return 0, nil
}
func (e errIterator) AtFloatHistogram(*histogram.FloatHistogram) (int64, *histogram.FloatHistogram) {
return 0, nil
}
func (e errIterator) AtT() int64 {
return 0
}
func (e errIterator) Err() error {
return e.err
}