pangolin_exporter
63 строки · 1.8 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 TestPgReplicationCollector(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
34columns := []string{"lag", "is_replica"}
35rows := sqlmock.NewRows(columns).
36AddRow(1000, 1)
37mock.ExpectQuery(sanitizeQuery(pgReplicationQuery)).WillReturnRows(rows)
38
39ch := make(chan prometheus.Metric)
40go func() {
41defer close(ch)
42c := PGReplicationCollector{}
43
44if err := c.Update(context.Background(), inst, ch); err != nil {
45t.Errorf("Error calling PGReplicationCollector.Update: %s", err)
46}
47}()
48
49expected := []MetricResult{
50{labels: labelMap{}, value: 1000, metricType: dto.MetricType_GAUGE},
51{labels: labelMap{}, value: 1, metricType: dto.MetricType_GAUGE},
52}
53
54convey.Convey("Metrics comparison", t, func() {
55for _, expect := range expected {
56m := readMetric(<-ch)
57convey.So(expect, convey.ShouldResemble, m)
58}
59})
60if err := mock.ExpectationsWereMet(); err != nil {
61t.Errorf("there were unfulfilled exceptions: %s", err)
62}
63}
64