prometheus/model/metric_test.go

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// Copyright 2013 Prometheus Team
// 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 model
import (
"github.com/prometheus/prometheus/utility/test"
"testing"
"time"
)
func testMetric(t test.Tester) {
var scenarios = []struct {
input map[string]string
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hash uint64
rowkey string
}{
{
input: map[string]string{},
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rowkey: "02676020557754725067--0-",
hash: 2676020557754725067,
},
{
input: map[string]string{
"first_name": "electro",
"occupation": "robot",
"manufacturer": "westinghouse",
},
rowkey: "04776841610193542734-f-6-t",
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hash: 4776841610193542734,
},
{
input: map[string]string{
"x": "y",
},
rowkey: "01306929544689993150-x-2-y",
hash: 1306929544689993150,
},
}
for i, scenario := range scenarios {
metric := Metric{}
for key, value := range scenario.input {
metric[LabelName(key)] = LabelValue(value)
}
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expectedRowKey := scenario.rowkey
expectedHash := scenario.hash
fingerprint := NewFingerprintFromMetric(metric)
actualRowKey := fingerprint.ToRowKey()
actualHash := fingerprint.Hash()
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if expectedRowKey != actualRowKey {
t.Errorf("%d. expected %s, got %s", i, expectedRowKey, actualRowKey)
}
if actualHash != expectedHash {
t.Errorf("%d. expected %d, got %d", i, expectedHash, actualHash)
}
}
}
func TestMetric(t *testing.T) {
testMetric(t)
}
func BenchmarkMetric(b *testing.B) {
for i := 0; i < b.N; i++ {
testMetric(b)
}
}
func testValues(t test.Tester) {
type in struct {
values Values
time time.Time
}
instant := time.Now()
var scenarios = []struct {
in in
out Values
}{
{
in: in{
time: instant,
values: Values{
{
Value: 0,
Timestamp: instant,
},
{
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Value: 2,
Timestamp: instant.Add(2 * time.Second),
},
{
Value: 3,
Timestamp: instant.Add(3 * time.Second),
},
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
out: Values{
{
Value: 0,
Timestamp: instant,
},
{
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Value: 2,
Timestamp: instant.Add(2 * time.Second),
},
{
Value: 3,
Timestamp: instant.Add(3 * time.Second),
},
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
{
in: in{
time: instant.Add(2 * time.Second),
values: Values{
{
Value: 0,
Timestamp: instant,
},
{
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Value: 2,
Timestamp: instant.Add(2 * time.Second),
},
{
Value: 3,
Timestamp: instant.Add(3 * time.Second),
},
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
out: Values{
{
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Value: 2,
Timestamp: instant.Add(2 * time.Second),
},
{
Value: 3,
Timestamp: instant.Add(3 * time.Second),
},
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
{
in: in{
time: instant.Add(5 * time.Second),
values: Values{
{
Value: 0,
Timestamp: instant,
},
{
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Value: 2,
Timestamp: instant.Add(2 * time.Second),
},
{
Value: 3,
Timestamp: instant.Add(3 * time.Second),
},
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
out: Values{
// Preserve the last value in case it needs to be used for the next set.
{
Value: 4,
Timestamp: instant.Add(4 * time.Second),
},
},
},
}
for i, scenario := range scenarios {
actual := scenario.in.values.TruncateBefore(scenario.in.time)
if len(actual) != len(scenario.out) {
t.Fatalf("%d. expected length of %d, got %d", i, len(scenario.out), len(actual))
}
for j, actualValue := range actual {
if !actualValue.Equal(scenario.out[j]) {
t.Fatalf("%d.%d. expected %s, got %s", i, j, scenario.out[j], actualValue)
}
}
}
}
func TestValues(t *testing.T) {
testValues(t)
}