prometheus/chunks_test.go

99 lines
2.3 KiB
Go

// 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 tsdb
import (
"math/rand"
"testing"
"github.com/pkg/errors"
"github.com/prometheus/tsdb/chunks"
"github.com/stretchr/testify/require"
)
type mockChunkReader map[uint64]chunks.Chunk
func (cr mockChunkReader) Chunk(ref uint64) (chunks.Chunk, error) {
chk, ok := cr[ref]
if ok {
return chk, nil
}
return nil, errors.New("Chunk with ref not found")
}
func (cr mockChunkReader) Close() error {
return nil
}
func TestDeletedIterator(t *testing.T) {
chk := chunks.NewXORChunk()
app, err := chk.Appender()
require.NoError(t, err)
// Insert random stuff from (0, 1000).
act := make([]sample, 1000)
for i := 0; i < 1000; i++ {
act[i].t = int64(i)
act[i].v = rand.Float64()
app.Append(act[i].t, act[i].v)
}
cases := []struct {
r Intervals
}{
{r: Intervals{{1, 20}}},
{r: Intervals{{1, 10}, {12, 20}, {21, 23}, {25, 30}}},
{r: Intervals{{1, 10}, {12, 20}, {20, 30}}},
{r: Intervals{{1, 10}, {12, 23}, {25, 30}}},
{r: Intervals{{1, 23}, {12, 20}, {25, 30}}},
{r: Intervals{{1, 23}, {12, 20}, {25, 3000}}},
{r: Intervals{{0, 2000}}},
{r: Intervals{{500, 2000}}},
{r: Intervals{{0, 200}}},
{r: Intervals{{1000, 20000}}},
}
for _, c := range cases {
i := int64(-1)
it := &deletedIterator{it: chk.Iterator(), intervals: c.r[:]}
ranges := c.r[:]
for it.Next() {
i++
for _, tr := range ranges {
if tr.inBounds(i) {
i = tr.Maxt + 1
ranges = ranges[1:]
}
}
require.True(t, i < 1000)
ts, v := it.At()
require.Equal(t, act[i].t, ts)
require.Equal(t, act[i].v, v)
}
// There has been an extra call to Next().
i++
for _, tr := range ranges {
if tr.inBounds(i) {
i = tr.Maxt + 1
ranges = ranges[1:]
}
}
require.False(t, i < 1000)
require.NoError(t, it.Err())
}
}