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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package metrics
import (
"context"
"fmt"
"strings"
"testing"
"time"
"github.com/algorand/go-algorand/test/partitiontest"
"github.com/stretchr/testify/require"
)
type CounterTest struct {
MetricTest
}
func TestMetricCounter(t *testing.T) {
partitiontest.PartitionTest(t)
test := &CounterTest{
MetricTest: NewMetricTest(),
}
// create a http listener.
port := test.createListener("127.0.0.1:0")
metricService := MakeMetricService(&ServiceConfig{
NodeExporterListenAddress: fmt.Sprintf("localhost:%d", port),
Labels: map[string]string{
"host_name": "host_one",
"session_id": "AFX-229"},
})
metricService.Start(context.Background())
counter := MakeCounter(MetricName{Name: "metric_test_name1", Description: "this is the metric test for counter object"})
for i := 0; i < 20; i++ {
counter.Inc(map[string]string{"pid": "123", "data_host": fmt.Sprintf("host%d", i%5)})
// wait half-a cycle
time.Sleep(test.sampleRate / 2)
}
// wait two reporting cycles to ensure we received all the messages.
time.Sleep(test.sampleRate * 2)
metricService.Shutdown()
counter.Deregister(nil)
// test the metrics values.
test.Lock()
defer test.Unlock()
// the the loop above we've created a single metric name with five different labels set ( host0, host1 .. host 4)
// let's see if we received all the 5 different labels.
require.Equal(t, 5, len(test.metrics), "Missing metric counts were reported: %+v", test.metrics)
for k, v := range test.metrics {
// we have increased each one of the labels exactly 4 times. See that the counter was counting correctly.
// ( counters starts at zero )
require.Equal(t, "4", v, fmt.Sprintf("The metric '%s' reached value '%s'", k, v))
}
}
func TestMetricCounterFastInts(t *testing.T) {
partitiontest.PartitionTest(t)
test := &CounterTest{
MetricTest: NewMetricTest(),
}
// create a http listener.
port := test.createListener("127.0.0.1:0")
metricService := MakeMetricService(&ServiceConfig{
NodeExporterListenAddress: fmt.Sprintf("localhost:%d", port),
Labels: map[string]string{
"host_name": "host_one",
"session_id": "AFX-229"},
})
metricService.Start(context.Background())
counter := MakeCounter(MetricName{Name: "metric_test_name1", Description: "this is the metric test for counter object"})
for i := 0; i < 20; i++ {
counter.Inc(nil)
// wait half-a cycle
time.Sleep(test.sampleRate / 2)
}
counter.AddUint64(2, nil)
// wait two reporting cycles to ensure we received all the messages.
time.Sleep(test.sampleRate * 2)
metricService.Shutdown()
counter.Deregister(nil)
// test the metrics values.
test.Lock()
defer test.Unlock()
// the the loop above we've created a single metric name with five different labels set ( host0, host1 .. host 4)
// let's see if we received all the 5 different labels.
require.Equal(t, 1, len(test.metrics), "Missing metric counts were reported: %+v", test.metrics)
for k, v := range test.metrics {
// we have increased each one of the labels exactly 4 times. See that the counter was counting correctly.
// ( counters starts at zero )
require.Equal(t, "22", v, fmt.Sprintf("The metric '%s' reached value '%s'", k, v))
}
}
func TestMetricCounterMixed(t *testing.T) {
partitiontest.PartitionTest(t)
test := &CounterTest{
MetricTest: NewMetricTest(),
}
// create a http listener.
port := test.createListener("127.0.0.1:0")
metricService := MakeMetricService(&ServiceConfig{
NodeExporterListenAddress: fmt.Sprintf("localhost:%d", port),
Labels: map[string]string{
"host_name": "host_one",
"session_id": "AFX-229"},
})
metricService.Start(context.Background())
counter := MakeCounter(MetricName{Name: "metric_test_name1", Description: "this is the metric test for counter object"})
counter.AddUint64(5, nil)
counter.AddUint64(8, map[string]string{})
for i := 0; i < 20; i++ {
counter.Inc(nil)
// wait half-a cycle
time.Sleep(test.sampleRate / 2)
}
counter.AddUint64(2, nil)
// wait two reporting cycles to ensure we received all the messages.
time.Sleep(test.sampleRate * 2)
metricService.Shutdown()
counter.Deregister(nil)
// test the metrics values.
test.Lock()
defer test.Unlock()
// the the loop above we've created a single metric name with five different labels set ( host0, host1 .. host 4)
// let's see if we received all the 5 different labels.
require.Equal(t, 1, len(test.metrics), "Missing metric counts were reported: %+v", test.metrics)
for k, v := range test.metrics {
// we have increased each one of the labels exactly 4 times. See that the counter was counting correctly.
// ( counters starts at zero )
require.Equal(t, "35", v, fmt.Sprintf("The metric '%s' reached value '%s'", k, v))
}
}
func TestCounterWriteMetric(t *testing.T) {
partitiontest.PartitionTest(t)
c := MakeCounter(MetricName{Name: "testname", Description: "testhelp"})
c.Deregister(nil)
// ensure 0 counters are still logged
sbOut := strings.Builder{}
c.WriteMetric(&sbOut, `host="myhost"`)
expected := `# HELP testname testhelp
# TYPE testname counter
testname{host="myhost"} 0
`
require.Equal(t, expected, sbOut.String())
c.AddUint64(2, nil)
// ensure non-zero counters are logged
sbOut = strings.Builder{}
c.WriteMetric(&sbOut, `host="myhost"`)
expected = `# HELP testname testhelp
# TYPE testname counter
testname{host="myhost"} 2
`
require.Equal(t, expected, sbOut.String())
}
func TestGetValue(t *testing.T) {
partitiontest.PartitionTest(t)
c := MakeCounter(MetricName{Name: "testname", Description: "testhelp"})
c.Deregister(nil)
require.Equal(t, uint64(0), c.GetUint64Value())
c.Inc(nil)
require.Equal(t, uint64(1), c.GetUint64Value())
c.Inc(nil)
require.Equal(t, uint64(2), c.GetUint64Value())
}
func TestGetValueForLabels(t *testing.T) {
partitiontest.PartitionTest(t)
c := MakeCounter(MetricName{Name: "testname", Description: "testhelp"})
c.Deregister(nil)
labels := map[string]string{"a": "b"}
require.Equal(t, uint64(0), c.GetUint64ValueForLabels(labels))
c.Inc(labels)
require.Equal(t, uint64(1), c.GetUint64ValueForLabels(labels))
c.Inc(labels)
require.Equal(t, uint64(2), c.GetUint64ValueForLabels(labels))
// confirm that the value is not shared between labels
c.Inc(nil)
require.Equal(t, uint64(2), c.GetUint64ValueForLabels(labels))
labels2 := map[string]string{"a": "c"}
c.Inc(labels2)
require.Equal(t, uint64(1), c.GetUint64ValueForLabels(labels2))
}
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