pangolin_exporter
95 строк · 2.7 Кб
1// Copyright 2023 The Prometheus Authors
2// Licensed under the Apache License, Version 2.0 (the "License");
3// you may not use this file except in compliance with the License.
4// You may obtain a copy of the License at
5//
6// http://www.apache.org/licenses/LICENSE-2.0
7//
8// Unless required by applicable law or agreed to in writing, software
9// distributed under the License is distributed on an "AS IS" BASIS,
10// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11// See the License for the specific language governing permissions and
12// limitations under the License.
13package collector
14
15import (
16"context"
17"testing"
18
19"github.com/DATA-DOG/go-sqlmock"
20"github.com/prometheus/client_golang/prometheus"
21dto "github.com/prometheus/client_model/go"
22"github.com/smartystreets/goconvey/convey"
23)
24
25func TestPgPostmasterCollector(t *testing.T) {
26db, mock, err := sqlmock.New()
27if err != nil {
28t.Fatalf("Error opening a stub db connection: %s", err)
29}
30defer db.Close()
31
32inst := &instance{db: db}
33
34mock.ExpectQuery(sanitizeQuery(pgPostmasterQuery)).WillReturnRows(sqlmock.NewRows([]string{"pg_postmaster_start_time"}).
35AddRow(1685739904))
36
37ch := make(chan prometheus.Metric)
38go func() {
39defer close(ch)
40c := PGPostmasterCollector{}
41
42if err := c.Update(context.Background(), inst, ch); err != nil {
43t.Errorf("Error calling PGPostmasterCollector.Update: %s", err)
44}
45}()
46
47expected := []MetricResult{
48{labels: labelMap{}, value: 1685739904, metricType: dto.MetricType_GAUGE},
49}
50convey.Convey("Metrics comparison", t, func() {
51for _, expect := range expected {
52m := readMetric(<-ch)
53convey.So(expect, convey.ShouldResemble, m)
54}
55})
56if err := mock.ExpectationsWereMet(); err != nil {
57t.Errorf("there were unfulfilled exceptions: %s", err)
58}
59}
60
61func TestPgPostmasterCollectorNullTime(t *testing.T) {
62db, mock, err := sqlmock.New()
63if err != nil {
64t.Fatalf("Error opening a stub db connection: %s", err)
65}
66defer db.Close()
67
68inst := &instance{db: db}
69
70mock.ExpectQuery(sanitizeQuery(pgPostmasterQuery)).WillReturnRows(sqlmock.NewRows([]string{"pg_postmaster_start_time"}).
71AddRow(nil))
72
73ch := make(chan prometheus.Metric)
74go func() {
75defer close(ch)
76c := PGPostmasterCollector{}
77
78if err := c.Update(context.Background(), inst, ch); err != nil {
79t.Errorf("Error calling PGPostmasterCollector.Update: %s", err)
80}
81}()
82
83expected := []MetricResult{
84{labels: labelMap{}, value: 0, metricType: dto.MetricType_GAUGE},
85}
86convey.Convey("Metrics comparison", t, func() {
87for _, expect := range expected {
88m := readMetric(<-ch)
89convey.So(expect, convey.ShouldResemble, m)
90}
91})
92if err := mock.ExpectationsWereMet(); err != nil {
93t.Errorf("there were unfulfilled exceptions: %s", err)
94}
95}
96