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Merge pull request #178 from Sticksman/add-collector-test
Add collector test
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| // Copyright 2024 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 langu | ||
| package main | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "log/slog" | ||
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| "github.com/DATA-DOG/go-sqlmock" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| dto "github.com/prometheus/client_model/go" | ||
| "github.com/smartystreets/goconvey/convey" | ||
| ) | ||
|
|
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| type labelMap map[string]string | ||
|
|
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| type MetricResult struct { | ||
| labels labelMap | ||
| value float64 | ||
| metricType dto.MetricType | ||
| } | ||
|
|
||
| func readMetric(m prometheus.Metric) MetricResult { | ||
| pb := &dto.Metric{} | ||
| m.Write(pb) | ||
| labels := make(labelMap, len(pb.Label)) | ||
| for _, v := range pb.Label { | ||
| labels[v.GetName()] = v.GetValue() | ||
| } | ||
| if pb.Gauge != nil { | ||
| return MetricResult{labels: labels, value: pb.GetGauge().GetValue(), metricType: dto.MetricType_GAUGE} | ||
| } | ||
| if pb.Counter != nil { | ||
| return MetricResult{labels: labels, value: pb.GetCounter().GetValue(), metricType: dto.MetricType_COUNTER} | ||
| } | ||
| if pb.Untyped != nil { | ||
| return MetricResult{labels: labels, value: pb.GetUntyped().GetValue(), metricType: dto.MetricType_UNTYPED} | ||
| } | ||
| panic("Unsupported metric type") | ||
| } | ||
|
|
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| func TestQueryShowList(t *testing.T) { | ||
| db, mock, err := sqlmock.New() | ||
| if err != nil { | ||
| t.Fatalf("Error opening a stub db connection: %s", err) | ||
| } | ||
| defer db.Close() | ||
|
|
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| rows := sqlmock.NewRows([]string{"key", "value"}). | ||
| AddRow("dns_queries", -1). | ||
| AddRow("databases", 1). | ||
| AddRow("pools", 0). | ||
| AddRow("users", 2) | ||
|
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| mock.ExpectQuery("SHOW LISTS;").WillReturnRows(rows) | ||
| logger := &slog.Logger{} | ||
|
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| ch := make(chan prometheus.Metric) | ||
| go func() { | ||
| defer close(ch) | ||
| if err := queryShowLists(ch, db, logger); err != nil { | ||
| t.Errorf("Error running queryShowList: %s", err) | ||
| } | ||
| }() | ||
|
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| expected := []MetricResult{ | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: -1}, | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: 1}, | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: 0}, | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: 2}, | ||
| } | ||
|
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| 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) | ||
| } | ||
| } | ||
|
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| func TestQueryShowConfig(t *testing.T) { | ||
| db, mock, err := sqlmock.New() | ||
| if err != nil { | ||
| t.Fatalf("Error opening a stub db connection: %s", err) | ||
| } | ||
| defer db.Close() | ||
|
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| rows := sqlmock.NewRows([]string{"key", "value", "default", "changeable"}). | ||
| AddRow("max_client_conn", 1900, 100, true). | ||
| AddRow("max_user_connections", 100, 100, true). | ||
| AddRow("auth_type", "md5", "md5", true). | ||
| AddRow("client_tls_ciphers", "default", "default", "yes") | ||
|
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| mock.ExpectQuery("SHOW CONFIG;").WillReturnRows(rows) | ||
| logger := &slog.Logger{} | ||
|
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| ch := make(chan prometheus.Metric) | ||
| go func() { | ||
| defer close(ch) | ||
| if err := queryShowConfig(ch, db, logger); err != nil { | ||
| t.Errorf("Error running queryShowConfig: %s", err) | ||
| } | ||
| }() | ||
|
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| expected := []MetricResult{ | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: 1900}, | ||
| {labels: labelMap{}, metricType: dto.MetricType_GAUGE, value: 100}, | ||
| } | ||
| 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) | ||
| } | ||
| } |
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