815 lines
16 KiB
Go
815 lines
16 KiB
Go
// 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 index
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import (
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"encoding/binary"
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"fmt"
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"math/rand"
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"sort"
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"testing"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestMemPostings_addFor(t *testing.T) {
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p := NewMemPostings()
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p.m[allPostingsKey.Name] = map[string][]uint64{}
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p.m[allPostingsKey.Name][allPostingsKey.Value] = []uint64{1, 2, 3, 4, 6, 7, 8}
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p.addFor(5, allPostingsKey)
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testutil.Equals(t, []uint64{1, 2, 3, 4, 5, 6, 7, 8}, p.m[allPostingsKey.Name][allPostingsKey.Value])
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}
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func TestMemPostings_ensureOrder(t *testing.T) {
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p := NewUnorderedMemPostings()
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p.m["a"] = map[string][]uint64{}
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for i := 0; i < 100; i++ {
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l := make([]uint64, 100)
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for j := range l {
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l[j] = rand.Uint64()
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}
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v := fmt.Sprintf("%d", i)
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p.m["a"][v] = l
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}
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p.EnsureOrder()
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for _, e := range p.m {
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for _, l := range e {
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ok := sort.SliceIsSorted(l, func(i, j int) bool {
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return l[i] < l[j]
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})
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if !ok {
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t.Fatalf("postings list %v is not sorted", l)
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}
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}
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}
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}
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func TestIntersect(t *testing.T) {
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a := newListPostings(1, 2, 3)
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b := newListPostings(2, 3, 4)
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var cases = []struct {
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in []Postings
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res Postings
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}{
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{
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in: []Postings{},
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res: EmptyPostings(),
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},
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{
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in: []Postings{a, b, EmptyPostings()},
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res: EmptyPostings(),
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},
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{
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in: []Postings{b, a, EmptyPostings()},
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res: EmptyPostings(),
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},
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{
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in: []Postings{EmptyPostings(), b, a},
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res: EmptyPostings(),
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},
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{
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in: []Postings{EmptyPostings(), a, b},
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res: EmptyPostings(),
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},
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{
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in: []Postings{a, EmptyPostings(), b},
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res: EmptyPostings(),
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},
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{
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in: []Postings{b, EmptyPostings(), a},
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res: EmptyPostings(),
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},
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{
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in: []Postings{b, EmptyPostings(), a, a, b, a, a, a},
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res: EmptyPostings(),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 5),
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newListPostings(6, 7, 8, 9, 10),
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},
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res: newListPostings(),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 5),
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newListPostings(4, 5, 6, 7, 8),
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},
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res: newListPostings(4, 5),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 9, 10),
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newListPostings(1, 4, 5, 6, 7, 8, 10, 11),
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},
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res: newListPostings(1, 4, 10),
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},
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{
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in: []Postings{
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newListPostings(1),
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newListPostings(0, 1),
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},
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res: newListPostings(1),
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},
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{
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in: []Postings{
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newListPostings(1),
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},
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res: newListPostings(1),
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},
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{
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in: []Postings{
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newListPostings(1),
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newListPostings(),
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},
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res: newListPostings(),
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},
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{
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in: []Postings{
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newListPostings(),
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newListPostings(),
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},
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res: newListPostings(),
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},
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}
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for _, c := range cases {
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t.Run("", func(t *testing.T) {
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if c.res == nil {
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t.Fatal("intersect result expectancy cannot be nil")
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}
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expected, err := ExpandPostings(c.res)
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testutil.Ok(t, err)
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i := Intersect(c.in...)
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if c.res == EmptyPostings() {
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testutil.Equals(t, EmptyPostings(), i)
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return
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}
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if i == EmptyPostings() {
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t.Fatal("intersect unexpected result: EmptyPostings sentinel")
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}
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res, err := ExpandPostings(i)
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testutil.Ok(t, err)
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testutil.Equals(t, expected, res)
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})
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}
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}
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func TestMultiIntersect(t *testing.T) {
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var cases = []struct {
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p [][]uint64
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res []uint64
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}{
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{
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p: [][]uint64{
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{1, 2, 3, 4, 5, 6, 1000, 1001},
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{2, 4, 5, 6, 7, 8, 999, 1001},
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{1, 2, 5, 6, 7, 8, 1001, 1200},
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},
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res: []uint64{2, 5, 6, 1001},
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},
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// One of the reproduceable cases for:
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// https://github.com/prometheus/prometheus/issues/2616
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// The initialisation of intersectPostings was moving the iterator forward
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// prematurely making us miss some postings.
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{
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p: [][]uint64{
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{1, 2},
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{1, 2},
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{1, 2},
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{2},
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},
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res: []uint64{2},
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},
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}
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for _, c := range cases {
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ps := make([]Postings, 0, len(c.p))
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for _, postings := range c.p {
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ps = append(ps, newListPostings(postings...))
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}
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res, err := ExpandPostings(Intersect(ps...))
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testutil.Ok(t, err)
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testutil.Equals(t, c.res, res)
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}
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}
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func BenchmarkIntersect(t *testing.B) {
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t.Run("LongPostings1", func(bench *testing.B) {
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var a, b, c, d []uint64
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for i := 0; i < 10000000; i += 2 {
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a = append(a, uint64(i))
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}
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for i := 5000000; i < 5000100; i += 4 {
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b = append(b, uint64(i))
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}
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for i := 5090000; i < 5090600; i += 4 {
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b = append(b, uint64(i))
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}
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for i := 4990000; i < 5100000; i++ {
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c = append(c, uint64(i))
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}
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for i := 4000000; i < 6000000; i++ {
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d = append(d, uint64(i))
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}
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i1 := newListPostings(a...)
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i2 := newListPostings(b...)
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i3 := newListPostings(c...)
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i4 := newListPostings(d...)
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bench.ResetTimer()
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bench.ReportAllocs()
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for i := 0; i < bench.N; i++ {
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if _, err := ExpandPostings(Intersect(i1, i2, i3, i4)); err != nil {
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bench.Fatal(err)
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}
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}
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})
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t.Run("LongPostings2", func(bench *testing.B) {
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var a, b, c, d []uint64
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for i := 0; i < 12500000; i++ {
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a = append(a, uint64(i))
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}
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for i := 7500000; i < 12500000; i++ {
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b = append(b, uint64(i))
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}
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for i := 9000000; i < 20000000; i++ {
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c = append(c, uint64(i))
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}
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for i := 10000000; i < 12000000; i++ {
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d = append(d, uint64(i))
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}
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i1 := newListPostings(a...)
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i2 := newListPostings(b...)
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i3 := newListPostings(c...)
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i4 := newListPostings(d...)
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bench.ResetTimer()
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bench.ReportAllocs()
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for i := 0; i < bench.N; i++ {
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if _, err := ExpandPostings(Intersect(i1, i2, i3, i4)); err != nil {
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bench.Fatal(err)
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}
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}
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})
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// Many matchers(k >> n).
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t.Run("ManyPostings", func(bench *testing.B) {
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var its []Postings
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// 100000 matchers(k=100000).
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for i := 0; i < 100000; i++ {
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var temp []uint64
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for j := 1; j < 100; j++ {
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temp = append(temp, uint64(j))
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}
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its = append(its, newListPostings(temp...))
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}
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bench.ResetTimer()
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bench.ReportAllocs()
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for i := 0; i < bench.N; i++ {
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if _, err := ExpandPostings(Intersect(its...)); err != nil {
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bench.Fatal(err)
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}
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}
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})
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}
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func TestMultiMerge(t *testing.T) {
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i1 := newListPostings(1, 2, 3, 4, 5, 6, 1000, 1001)
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i2 := newListPostings(2, 4, 5, 6, 7, 8, 999, 1001)
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i3 := newListPostings(1, 2, 5, 6, 7, 8, 1001, 1200)
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res, err := ExpandPostings(Merge(i1, i2, i3))
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testutil.Ok(t, err)
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testutil.Equals(t, []uint64{1, 2, 3, 4, 5, 6, 7, 8, 999, 1000, 1001, 1200}, res)
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}
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func TestMergedPostings(t *testing.T) {
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var cases = []struct {
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in []Postings
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res Postings
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}{
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{
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in: []Postings{},
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res: EmptyPostings(),
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},
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{
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in: []Postings{
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newListPostings(),
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newListPostings(),
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},
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res: EmptyPostings(),
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},
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{
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in: []Postings{
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newListPostings(),
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},
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res: newListPostings(),
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},
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{
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in: []Postings{
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EmptyPostings(),
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EmptyPostings(),
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EmptyPostings(),
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EmptyPostings(),
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},
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res: EmptyPostings(),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 5),
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newListPostings(6, 7, 8, 9, 10),
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},
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res: newListPostings(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 5),
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newListPostings(4, 5, 6, 7, 8),
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},
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res: newListPostings(1, 2, 3, 4, 5, 6, 7, 8),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 9, 10),
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newListPostings(1, 4, 5, 6, 7, 8, 10, 11),
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},
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res: newListPostings(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11),
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},
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{
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in: []Postings{
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newListPostings(1, 2, 3, 4, 9, 10),
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EmptyPostings(),
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newListPostings(1, 4, 5, 6, 7, 8, 10, 11),
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},
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res: newListPostings(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11),
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},
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{
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in: []Postings{
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newListPostings(1, 2),
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newListPostings(),
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},
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res: newListPostings(1, 2),
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},
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{
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in: []Postings{
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newListPostings(1, 2),
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EmptyPostings(),
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},
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res: newListPostings(1, 2),
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},
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}
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for _, c := range cases {
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t.Run("", func(t *testing.T) {
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if c.res == nil {
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t.Fatal("merge result expectancy cannot be nil")
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}
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expected, err := ExpandPostings(c.res)
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testutil.Ok(t, err)
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m := Merge(c.in...)
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if c.res == EmptyPostings() {
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testutil.Equals(t, EmptyPostings(), m)
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return
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}
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if m == EmptyPostings() {
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t.Fatal("merge unexpected result: EmptyPostings sentinel")
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}
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res, err := ExpandPostings(m)
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testutil.Ok(t, err)
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testutil.Equals(t, expected, res)
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})
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}
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}
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func TestMergedPostingsSeek(t *testing.T) {
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var cases = []struct {
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a, b []uint64
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seek uint64
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success bool
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res []uint64
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}{
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{
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a: []uint64{2, 3, 4, 5},
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b: []uint64{6, 7, 8, 9, 10},
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seek: 1,
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success: true,
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res: []uint64{2, 3, 4, 5, 6, 7, 8, 9, 10},
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},
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{
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a: []uint64{1, 2, 3, 4, 5},
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b: []uint64{6, 7, 8, 9, 10},
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seek: 2,
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success: true,
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res: []uint64{2, 3, 4, 5, 6, 7, 8, 9, 10},
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},
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{
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a: []uint64{1, 2, 3, 4, 5},
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b: []uint64{4, 5, 6, 7, 8},
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seek: 9,
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success: false,
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res: nil,
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},
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{
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a: []uint64{1, 2, 3, 4, 9, 10},
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b: []uint64{1, 4, 5, 6, 7, 8, 10, 11},
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seek: 10,
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success: true,
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res: []uint64{10, 11},
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},
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}
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for _, c := range cases {
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a := newListPostings(c.a...)
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b := newListPostings(c.b...)
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p := Merge(a, b)
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testutil.Equals(t, c.success, p.Seek(c.seek))
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// After Seek(), At() should be called.
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if c.success {
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start := p.At()
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lst, err := ExpandPostings(p)
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testutil.Ok(t, err)
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lst = append([]uint64{start}, lst...)
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testutil.Equals(t, c.res, lst)
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}
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}
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}
|
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|
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func TestRemovedPostings(t *testing.T) {
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var cases = []struct {
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a, b []uint64
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res []uint64
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}{
|
|
{
|
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a: nil,
|
|
b: nil,
|
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res: []uint64(nil),
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},
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{
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a: []uint64{1, 2, 3, 4},
|
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b: nil,
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res: []uint64{1, 2, 3, 4},
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},
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{
|
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a: nil,
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b: []uint64{1, 2, 3, 4},
|
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res: []uint64(nil),
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},
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{
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a: []uint64{1, 2, 3, 4, 5},
|
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b: []uint64{6, 7, 8, 9, 10},
|
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res: []uint64{1, 2, 3, 4, 5},
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},
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{
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a: []uint64{1, 2, 3, 4, 5},
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b: []uint64{4, 5, 6, 7, 8},
|
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res: []uint64{1, 2, 3},
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|
},
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{
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a: []uint64{1, 2, 3, 4, 9, 10},
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b: []uint64{1, 4, 5, 6, 7, 8, 10, 11},
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res: []uint64{2, 3, 9},
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},
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{
|
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a: []uint64{1, 2, 3, 4, 9, 10},
|
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b: []uint64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11},
|
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res: []uint64(nil),
|
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},
|
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}
|
|
|
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for _, c := range cases {
|
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a := newListPostings(c.a...)
|
|
b := newListPostings(c.b...)
|
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|
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res, err := ExpandPostings(newRemovedPostings(a, b))
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testutil.Ok(t, err)
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testutil.Equals(t, c.res, res)
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}
|
|
|
|
}
|
|
|
|
func TestRemovedNextStackoverflow(t *testing.T) {
|
|
var full []uint64
|
|
var remove []uint64
|
|
|
|
var i uint64
|
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for i = 0; i < 1e7; i++ {
|
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full = append(full, i)
|
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remove = append(remove, i)
|
|
}
|
|
|
|
flp := newListPostings(full...)
|
|
rlp := newListPostings(remove...)
|
|
rp := newRemovedPostings(flp, rlp)
|
|
gotElem := false
|
|
for rp.Next() {
|
|
gotElem = true
|
|
}
|
|
|
|
testutil.Ok(t, rp.Err())
|
|
testutil.Assert(t, !gotElem, "")
|
|
}
|
|
|
|
func TestRemovedPostingsSeek(t *testing.T) {
|
|
var cases = []struct {
|
|
a, b []uint64
|
|
|
|
seek uint64
|
|
success bool
|
|
res []uint64
|
|
}{
|
|
{
|
|
a: []uint64{2, 3, 4, 5},
|
|
b: []uint64{6, 7, 8, 9, 10},
|
|
|
|
seek: 1,
|
|
success: true,
|
|
res: []uint64{2, 3, 4, 5},
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 5},
|
|
b: []uint64{6, 7, 8, 9, 10},
|
|
|
|
seek: 2,
|
|
success: true,
|
|
res: []uint64{2, 3, 4, 5},
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 5},
|
|
b: []uint64{4, 5, 6, 7, 8},
|
|
|
|
seek: 9,
|
|
success: false,
|
|
res: nil,
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 9, 10},
|
|
b: []uint64{1, 4, 5, 6, 7, 8, 10, 11},
|
|
|
|
seek: 10,
|
|
success: false,
|
|
res: nil,
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 9, 10},
|
|
b: []uint64{1, 4, 5, 6, 7, 8, 11},
|
|
|
|
seek: 4,
|
|
success: true,
|
|
res: []uint64{9, 10},
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 9, 10},
|
|
b: []uint64{1, 4, 5, 6, 7, 8, 11},
|
|
|
|
seek: 5,
|
|
success: true,
|
|
res: []uint64{9, 10},
|
|
},
|
|
{
|
|
a: []uint64{1, 2, 3, 4, 9, 10},
|
|
b: []uint64{1, 4, 5, 6, 7, 8, 11},
|
|
|
|
seek: 10,
|
|
success: true,
|
|
res: []uint64{10},
|
|
},
|
|
}
|
|
|
|
for _, c := range cases {
|
|
a := newListPostings(c.a...)
|
|
b := newListPostings(c.b...)
|
|
|
|
p := newRemovedPostings(a, b)
|
|
|
|
testutil.Equals(t, c.success, p.Seek(c.seek))
|
|
|
|
// After Seek(), At() should be called.
|
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if c.success {
|
|
start := p.At()
|
|
lst, err := ExpandPostings(p)
|
|
testutil.Ok(t, err)
|
|
|
|
lst = append([]uint64{start}, lst...)
|
|
testutil.Equals(t, c.res, lst)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBigEndian(t *testing.T) {
|
|
num := 1000
|
|
// mock a list as postings
|
|
ls := make([]uint32, num)
|
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ls[0] = 2
|
|
for i := 1; i < num; i++ {
|
|
ls[i] = ls[i-1] + uint32(rand.Int31n(25)) + 2
|
|
}
|
|
|
|
beLst := make([]byte, num*4)
|
|
for i := 0; i < num; i++ {
|
|
b := beLst[i*4 : i*4+4]
|
|
binary.BigEndian.PutUint32(b, ls[i])
|
|
}
|
|
|
|
t.Run("Iteration", func(t *testing.T) {
|
|
bep := newBigEndianPostings(beLst)
|
|
for i := 0; i < num; i++ {
|
|
testutil.Assert(t, bep.Next() == true, "")
|
|
testutil.Equals(t, uint64(ls[i]), bep.At())
|
|
}
|
|
|
|
testutil.Assert(t, bep.Next() == false, "")
|
|
testutil.Assert(t, bep.Err() == nil, "")
|
|
})
|
|
|
|
t.Run("Seek", func(t *testing.T) {
|
|
table := []struct {
|
|
seek uint32
|
|
val uint32
|
|
found bool
|
|
}{
|
|
{
|
|
ls[0] - 1, ls[0], true,
|
|
},
|
|
{
|
|
ls[4], ls[4], true,
|
|
},
|
|
{
|
|
ls[500] - 1, ls[500], true,
|
|
},
|
|
{
|
|
ls[600] + 1, ls[601], true,
|
|
},
|
|
{
|
|
ls[600] + 1, ls[601], true,
|
|
},
|
|
{
|
|
ls[600] + 1, ls[601], true,
|
|
},
|
|
{
|
|
ls[0], ls[601], true,
|
|
},
|
|
{
|
|
ls[600], ls[601], true,
|
|
},
|
|
{
|
|
ls[999], ls[999], true,
|
|
},
|
|
{
|
|
ls[999] + 10, ls[999], false,
|
|
},
|
|
}
|
|
|
|
bep := newBigEndianPostings(beLst)
|
|
|
|
for _, v := range table {
|
|
testutil.Equals(t, v.found, bep.Seek(uint64(v.seek)))
|
|
testutil.Equals(t, uint64(v.val), bep.At())
|
|
testutil.Assert(t, bep.Err() == nil, "")
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestIntersectWithMerge(t *testing.T) {
|
|
// One of the reproducible cases for:
|
|
// https://github.com/prometheus/prometheus/issues/2616
|
|
a := newListPostings(21, 22, 23, 24, 25, 30)
|
|
|
|
b := Merge(
|
|
newListPostings(10, 20, 30),
|
|
newListPostings(15, 26, 30),
|
|
)
|
|
|
|
p := Intersect(a, b)
|
|
res, err := ExpandPostings(p)
|
|
|
|
testutil.Ok(t, err)
|
|
testutil.Equals(t, []uint64{30}, res)
|
|
}
|
|
|
|
func TestWithoutPostings(t *testing.T) {
|
|
var cases = []struct {
|
|
base Postings
|
|
drop Postings
|
|
|
|
res Postings
|
|
}{
|
|
{
|
|
base: EmptyPostings(),
|
|
drop: EmptyPostings(),
|
|
|
|
res: EmptyPostings(),
|
|
},
|
|
{
|
|
base: EmptyPostings(),
|
|
drop: newListPostings(1, 2),
|
|
|
|
res: EmptyPostings(),
|
|
},
|
|
{
|
|
base: newListPostings(1, 2),
|
|
drop: EmptyPostings(),
|
|
|
|
res: newListPostings(1, 2),
|
|
},
|
|
{
|
|
base: newListPostings(),
|
|
drop: newListPostings(),
|
|
|
|
res: newListPostings(),
|
|
},
|
|
{
|
|
base: newListPostings(1, 2, 3),
|
|
drop: newListPostings(),
|
|
|
|
res: newListPostings(1, 2, 3),
|
|
},
|
|
{
|
|
base: newListPostings(1, 2, 3),
|
|
drop: newListPostings(4, 5, 6),
|
|
|
|
res: newListPostings(1, 2, 3),
|
|
},
|
|
{
|
|
base: newListPostings(1, 2, 3),
|
|
drop: newListPostings(3, 4, 5),
|
|
|
|
res: newListPostings(1, 2),
|
|
},
|
|
}
|
|
|
|
for _, c := range cases {
|
|
t.Run("", func(t *testing.T) {
|
|
if c.res == nil {
|
|
t.Fatal("without result expectancy cannot be nil")
|
|
}
|
|
|
|
expected, err := ExpandPostings(c.res)
|
|
testutil.Ok(t, err)
|
|
|
|
w := Without(c.base, c.drop)
|
|
|
|
if c.res == EmptyPostings() {
|
|
testutil.Equals(t, EmptyPostings(), w)
|
|
return
|
|
}
|
|
|
|
if w == EmptyPostings() {
|
|
t.Fatal("without unexpected result: EmptyPostings sentinel")
|
|
}
|
|
|
|
res, err := ExpandPostings(w)
|
|
testutil.Ok(t, err)
|
|
testutil.Equals(t, expected, res)
|
|
})
|
|
}
|
|
}
|