prometheus/tsdb/tombstones/tombstones_test.go

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// Copyright 2017 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 tombstones
import (
"io/ioutil"
"math/rand"
"os"
"sync"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/prometheus/prometheus/util/testutil"
)
func TestWriteAndReadbackTombStones(t *testing.T) {
tmpdir, _ := ioutil.TempDir("", "test")
defer func() {
testutil.Ok(t, os.RemoveAll(tmpdir))
}()
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ref := uint64(0)
stones := NewMemTombstones()
// Generate the tombstones.
for i := 0; i < 100; i++ {
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ref += uint64(rand.Int31n(10)) + 1
numRanges := rand.Intn(5) + 1
dranges := make(Intervals, 0, numRanges)
mint := rand.Int63n(time.Now().UnixNano())
for j := 0; j < numRanges; j++ {
dranges = dranges.Add(Interval{mint, mint + rand.Int63n(1000)})
mint += rand.Int63n(1000) + 1
}
stones.AddInterval(ref, dranges...)
}
_, err := WriteFile(log.NewNopLogger(), tmpdir, stones)
testutil.Ok(t, err)
restr, _, err := ReadTombstones(tmpdir)
testutil.Ok(t, err)
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// Compare the two readers.
testutil.Equals(t, stones, restr)
}
func TestAddingNewIntervals(t *testing.T) {
cases := []struct {
exist Intervals
new Interval
exp Intervals
}{
{
new: Interval{1, 2},
exp: Intervals{{1, 2}},
},
{
exist: Intervals{{1, 2}},
new: Interval{1, 2},
exp: Intervals{{1, 2}},
},
{
exist: Intervals{{1, 4}, {6, 6}},
new: Interval{5, 6},
exp: Intervals{{1, 6}},
},
{
exist: Intervals{{1, 10}, {12, 20}, {25, 30}},
new: Interval{21, 23},
exp: Intervals{{1, 10}, {12, 23}, {25, 30}},
},
{
exist: Intervals{{1, 2}, {3, 5}, {7, 7}},
new: Interval{6, 7},
exp: Intervals{{1, 2}, {3, 7}},
},
{
exist: Intervals{{1, 10}, {12, 20}, {25, 30}},
new: Interval{21, 25},
exp: Intervals{{1, 10}, {12, 30}},
},
{
exist: Intervals{{1, 10}, {12, 20}, {25, 30}},
new: Interval{18, 23},
exp: Intervals{{1, 10}, {12, 23}, {25, 30}},
},
{
exist: Intervals{{1, 10}, {12, 20}, {25, 30}},
new: Interval{9, 23},
exp: Intervals{{1, 23}, {25, 30}},
},
{
exist: Intervals{{1, 10}, {12, 20}, {25, 30}},
new: Interval{9, 230},
exp: Intervals{{1, 230}},
},
{
exist: Intervals{{5, 10}, {12, 20}, {25, 30}},
new: Interval{1, 4},
exp: Intervals{{1, 10}, {12, 20}, {25, 30}},
},
{
exist: Intervals{{5, 10}, {12, 20}, {25, 30}},
new: Interval{11, 14},
exp: Intervals{{5, 20}, {25, 30}},
},
{
exist: Intervals{{5, 10}, {12, 20}, {25, 30}},
new: Interval{1, 3},
exp: Intervals{{1, 3}, {5, 10}, {12, 20}, {25, 30}},
},
}
for _, c := range cases {
testutil.Equals(t, c.exp, c.exist.Add(c.new))
}
}
// TestMemTombstonesConcurrency to make sure they are safe to access from different goroutines.
func TestMemTombstonesConcurrency(t *testing.T) {
tomb := NewMemTombstones()
totalRuns := 100
var wg sync.WaitGroup
wg.Add(2)
go func() {
for x := 0; x < totalRuns; x++ {
tomb.AddInterval(uint64(x), Interval{int64(x), int64(x)})
}
wg.Done()
}()
go func() {
for x := 0; x < totalRuns; x++ {
_, err := tomb.Get(uint64(x))
testutil.Ok(t, err)
}
wg.Done()
}()
wg.Wait()
}