pangolin_exporter
64 строки · 2.0 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 TestPGDatabaseWraparoundCollector(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()
31inst := &instance{db: db}
32columns := []string{
33"datname",
34"age_datfrozenxid",
35"age_datminmxid",
36}
37rows := sqlmock.NewRows(columns).
38AddRow("newreddit", 87126426, 0)
39
40mock.ExpectQuery(sanitizeQuery(databaseWraparoundQuery)).WillReturnRows(rows)
41
42ch := make(chan prometheus.Metric)
43go func() {
44defer close(ch)
45c := PGDatabaseWraparoundCollector{}
46
47if err := c.Update(context.Background(), inst, ch); err != nil {
48t.Errorf("Error calling PGDatabaseWraparoundCollector.Update: %s", err)
49}
50}()
51expected := []MetricResult{
52{labels: labelMap{"datname": "newreddit"}, value: 87126426, metricType: dto.MetricType_GAUGE},
53{labels: labelMap{"datname": "newreddit"}, value: 0, metricType: dto.MetricType_GAUGE},
54}
55convey.Convey("Metrics comparison", t, func() {
56for _, expect := range expected {
57m := readMetric(<-ch)
58convey.So(expect, convey.ShouldResemble, m)
59}
60})
61if err := mock.ExpectationsWereMet(); err != nil {
62t.Errorf("there were unfulfilled exceptions: %s", err)
63}
64}
65