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// Copyright 2021 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 collectors
import (
"database/sql"
"testing"
"github.com/prometheus/client_golang/prometheus"
)
func TestDBStatsCollector(t *testing.T) {
reg := prometheus.NewPedanticRegistry()
{
db := new(sql.DB)
if err := reg.Register(NewDBStatsCollector(db, "db_A")); err != nil {
t.Fatal(err)
}
}
{
db := new(sql.DB)
if err := reg.Register(NewDBStatsCollector(db, "db_B")); err != nil {
t.Fatal(err)
}
}
mfs, err := reg.Gather()
if err != nil {
t.Fatal(err)
}
names := []string{
"go_sql_max_open_connections",
"go_sql_open_connections",
"go_sql_in_use_connections",
"go_sql_idle_connections",
"go_sql_wait_count_total",
"go_sql_wait_duration_seconds_total",
"go_sql_max_idle_closed_total",
"go_sql_max_lifetime_closed_total",
"go_sql_max_idle_time_closed_total",
}
type result struct {
found bool
}
results := make(map[string]result)
for _, name := range names {
results[name] = result{found: false}
}
for _, mf := range mfs {
m := mf.GetMetric()
if len(m) != 2 {
t.Errorf("expected 2 metrics bug got %d", len(m))
}
labelA := m[0].GetLabel()[0]
if name := labelA.GetName(); name != "db_name" {
t.Errorf("expected to get label \"db_name\" but got %s", name)
}
if value := labelA.GetValue(); value != "db_A" {
t.Errorf("expected to get value \"db_A\" but got %s", value)
}
labelB := m[1].GetLabel()[0]
if name := labelB.GetName(); name != "db_name" {
t.Errorf("expected to get label \"db_name\" but got %s", name)
}
if value := labelB.GetValue(); value != "db_B" {
t.Errorf("expected to get value \"db_B\" but got %s", value)
}
for _, name := range names {
if name == mf.GetName() {
results[name] = result{found: true}
break
}
}
}
for name, result := range results {
if !result.found {
t.Errorf("%s not found", name)
}
}
}
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