102 lines
2.9 KiB
Go
102 lines
2.9 KiB
Go
// Copyright 2016 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.
|
|
|
|
// Note: this file has tests for code in both delta.go and doubledelta.go --
|
|
// it may make sense to split those out later, but given that the tests are
|
|
// near-identical and share a helper, this feels simpler for now.
|
|
|
|
package local
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/prometheus/common/model"
|
|
)
|
|
|
|
func verifyUnmarshallingError(t *testing.T, err error, typ string, badLen int) {
|
|
|
|
if err == nil {
|
|
t.Errorf("Failed to obtain an error when unmarshalling %s with corrupt length of %d", typ, badLen)
|
|
return
|
|
}
|
|
|
|
expectedStr := "header size"
|
|
if !strings.Contains(err.Error(), expectedStr) {
|
|
t.Errorf(
|
|
"'%s' not present in error when unmarshalling %s with corrupt length %d: '%s'",
|
|
expectedStr,
|
|
typ,
|
|
badLen,
|
|
err.Error())
|
|
}
|
|
}
|
|
|
|
func TestUnmarshalingCorruptedDeltaReturnsAnError(t *testing.T) {
|
|
dec := newDeltaEncodedChunk(d1, d4, false, chunkLen)
|
|
|
|
cs, err := dec.add(model.SamplePair{
|
|
Timestamp: model.Now(),
|
|
Value: model.SampleValue(100),
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("Couldn't add sample to empty deltaEncodedChunk: %s", err)
|
|
}
|
|
|
|
buf := make([]byte, chunkLen)
|
|
|
|
cs[0].marshalToBuf(buf)
|
|
|
|
// Corrupt the length to be every possible too-small value
|
|
for i := 0; i < deltaHeaderBytes; i++ {
|
|
binary.LittleEndian.PutUint16(buf[deltaHeaderBufLenOffset:], uint16(i))
|
|
|
|
err = cs[0].unmarshalFromBuf(buf)
|
|
verifyUnmarshallingError(t, err, "deltaEncodedChunk (from buf)", i)
|
|
|
|
err = cs[0].unmarshal(bytes.NewBuffer(buf))
|
|
verifyUnmarshallingError(t, err, "deltaEncodedChunk (from Reader)", i)
|
|
}
|
|
}
|
|
|
|
func TestUnmarshalingCorruptedDoubleDeltaReturnsAnError(t *testing.T) {
|
|
ddec := newDoubleDeltaEncodedChunk(d1, d4, false, chunkLen)
|
|
|
|
cs, err := ddec.add(model.SamplePair{
|
|
Timestamp: model.Now(),
|
|
Value: model.SampleValue(100),
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("Couldn't add sample to empty doubleDeltaEncodedChunk: %s", err)
|
|
}
|
|
|
|
buf := make([]byte, chunkLen)
|
|
|
|
cs[0].marshalToBuf(buf)
|
|
|
|
// Corrupt the length to be every possible too-small value
|
|
for i := 0; i < doubleDeltaHeaderMinBytes; i++ {
|
|
|
|
binary.LittleEndian.PutUint16(buf[doubleDeltaHeaderBufLenOffset:], uint16(i))
|
|
|
|
err = cs[0].unmarshalFromBuf(buf)
|
|
verifyUnmarshallingError(t, err, "doubleDeltaEncodedChunk (from buf)", i)
|
|
|
|
err = cs[0].unmarshal(bytes.NewBuffer(buf))
|
|
verifyUnmarshallingError(t, err, "doubleDeltaEncodedChunk (from Reader)", i)
|
|
}
|
|
|
|
}
|