prometheus/storage/local/codable/codable_test.go

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// Copyright 2014 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 codable
import (
"bytes"
"encoding"
"reflect"
"testing"
)
func newFingerprint(fp int64) *Fingerprint {
cfp := Fingerprint(fp)
return &cfp
}
func newLabelName(ln string) *LabelName {
cln := LabelName(ln)
return &cln
}
func TestUint64(t *testing.T) {
var b bytes.Buffer
const n = 422010471112345
if err := EncodeUint64(&b, n); err != nil {
t.Fatal(err)
}
got, err := DecodeUint64(&b)
if err != nil {
t.Fatal(err)
}
if got != n {
t.Errorf("want %d, got %d", n, got)
}
}
var scenarios = []struct {
in encoding.BinaryMarshaler
out encoding.BinaryUnmarshaler
equal func(in, out interface{}) bool
}{
{
in: &Metric{
"label_1": "value_2",
"label_2": "value_2",
"label_3": "value_3",
},
out: &Metric{},
}, {
in: newFingerprint(12345),
out: newFingerprint(0),
}, {
in: &Fingerprints{1, 2, 56, 1234},
out: &Fingerprints{},
}, {
in: &Fingerprints{1, 2, 56, 1234},
out: &FingerprintSet{},
equal: func(in, out interface{}) bool {
inSet := FingerprintSet{}
for _, fp := range *(in.(*Fingerprints)) {
inSet[fp] = struct{}{}
}
return reflect.DeepEqual(inSet, *(out.(*FingerprintSet)))
},
}, {
in: &FingerprintSet{
1: struct{}{},
2: struct{}{},
56: struct{}{},
1234: struct{}{},
},
out: &FingerprintSet{},
}, {
in: &FingerprintSet{
1: struct{}{},
2: struct{}{},
56: struct{}{},
1234: struct{}{},
},
out: &Fingerprints{},
equal: func(in, out interface{}) bool {
outSet := FingerprintSet{}
for _, fp := range *(out.(*Fingerprints)) {
outSet[fp] = struct{}{}
}
return reflect.DeepEqual(outSet, *(in.(*FingerprintSet)))
},
}, {
in: &LabelPair{
Name: "label_name",
Value: "label_value",
},
out: &LabelPair{},
}, {
in: newLabelName("label_name"),
out: newLabelName(""),
}, {
in: &LabelValues{"value_1", "value_2", "value_3"},
out: &LabelValues{},
}, {
in: &LabelValues{"value_1", "value_2", "value_3"},
out: &LabelValueSet{},
equal: func(in, out interface{}) bool {
inSet := LabelValueSet{}
for _, lv := range *(in.(*LabelValues)) {
inSet[lv] = struct{}{}
}
return reflect.DeepEqual(inSet, *(out.(*LabelValueSet)))
},
}, {
in: &LabelValueSet{
"value_1": struct{}{},
"value_2": struct{}{},
"value_3": struct{}{},
},
out: &LabelValueSet{},
}, {
in: &LabelValueSet{
"value_1": struct{}{},
"value_2": struct{}{},
"value_3": struct{}{},
},
out: &LabelValues{},
equal: func(in, out interface{}) bool {
outSet := LabelValueSet{}
for _, lv := range *(out.(*LabelValues)) {
outSet[lv] = struct{}{}
}
return reflect.DeepEqual(outSet, *(in.(*LabelValueSet)))
},
}, {
in: &TimeRange{42, 2001},
out: &TimeRange{},
},
}
func TestCodec(t *testing.T) {
for i, s := range scenarios {
encoded, err := s.in.MarshalBinary()
if err != nil {
t.Fatal(err)
}
if err := s.out.UnmarshalBinary(encoded); err != nil {
t.Fatal(err)
}
equal := s.equal
if equal == nil {
equal = reflect.DeepEqual
}
if !equal(s.in, s.out) {
t.Errorf("%d. Got: %v; want %v; encoded bytes are: %v", i, s.out, s.in, encoded)
}
}
}