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pg_stat_bgwriter_test.go
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// Copyright 2023 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 collector
import (
"context"
"testing"
"time"
"github.com/DATA-DOG/go-sqlmock"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/smartystreets/goconvey/convey"
)
func TestPGStatBGWriterCollector(t *testing.T) {
db, mock, err := sqlmock.New()
if err != nil {
t.Fatalf("Error opening a stub db connection: %s", err)
}
defer db.Close()
inst := &instance{db: db}
columns := []string{
"checkpoints_timed",
"checkpoints_req",
"checkpoint_write_time",
"checkpoint_sync_time",
"buffers_checkpoint",
"buffers_clean",
"maxwritten_clean",
"buffers_backend",
"buffers_backend_fsync",
"buffers_alloc",
"stats_reset"}
srT, err := time.Parse("2006-01-02 15:04:05.00000-07", "2023-05-25 17:10:42.81132-07")
if err != nil {
t.Fatalf("Error parsing time: %s", err)
}
rows := sqlmock.NewRows(columns).
AddRow(354, 4945, 289097744, 1242257, int64(3275602074), 89320867, 450139, 2034563757, 0, int64(2725688749), srT)
mock.ExpectQuery(sanitizeQuery(statBGWriterQueryBefore17)).WillReturnRows(rows)
ch := make(chan prometheus.Metric)
go func() {
defer close(ch)
c := PGStatBGWriterCollector{}
if err := c.Update(context.Background(), inst, ch); err != nil {
t.Errorf("Error calling PGStatBGWriterCollector.Update: %s", err)
}
}()
expected := []MetricResult{
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 354},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 4945},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 289097744},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 1242257},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 3275602074},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 89320867},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 450139},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 2034563757},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 2725688749},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 1685059842},
}
convey.Convey("Metrics comparison", t, func() {
for _, expect := range expected {
m := readMetric(<-ch)
convey.So(expect, convey.ShouldResemble, m)
}
})
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled exceptions: %s", err)
}
}
func TestPGStatBGWriterCollectorNullValues(t *testing.T) {
db, mock, err := sqlmock.New()
if err != nil {
t.Fatalf("Error opening a stub db connection: %s", err)
}
defer db.Close()
inst := &instance{db: db}
columns := []string{
"checkpoints_timed",
"checkpoints_req",
"checkpoint_write_time",
"checkpoint_sync_time",
"buffers_checkpoint",
"buffers_clean",
"maxwritten_clean",
"buffers_backend",
"buffers_backend_fsync",
"buffers_alloc",
"stats_reset"}
rows := sqlmock.NewRows(columns).
AddRow(nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil)
mock.ExpectQuery(sanitizeQuery(statBGWriterQueryBefore17)).WillReturnRows(rows)
ch := make(chan prometheus.Metric)
go func() {
defer close(ch)
c := PGStatBGWriterCollector{}
if err := c.Update(context.Background(), inst, ch); err != nil {
t.Errorf("Error calling PGStatBGWriterCollector.Update: %s", err)
}
}()
expected := []MetricResult{
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
{labels: labelMap{}, metricType: dto.MetricType_COUNTER, value: 0},
}
convey.Convey("Metrics comparison", t, func() {
for _, expect := range expected {
m := readMetric(<-ch)
convey.So(expect, convey.ShouldResemble, m)
}
})
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled exceptions: %s", err)
}
}