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3b970c5133
This includes required refactorings to enable replacing the http client (for testing) and moving the NotificationReq type definitions to the "notifications" package, so that this package doesn't need to depend on "rules" anymore and that it can instead use a representation of the required data which only includes the necessary fields.
110 lines
4 KiB
Go
110 lines
4 KiB
Go
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package notification
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import (
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"bytes"
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"io"
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"io/ioutil"
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"net/http"
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"testing"
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"time"
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clientmodel "github.com/prometheus/client_golang/model"
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)
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type testHttpPoster struct {
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message string
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receivedPost chan<- bool
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}
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func (p *testHttpPoster) Post(url string, bodyType string, body io.Reader) (*http.Response, error) {
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var buf bytes.Buffer
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buf.ReadFrom(body)
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p.message = buf.String()
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p.receivedPost <- true
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return &http.Response{
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Body: ioutil.NopCloser(&bytes.Buffer{}),
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}, nil
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}
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type testNotificationScenario struct {
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description string
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summary string
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message string
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}
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func (s *testNotificationScenario) test(i int, t *testing.T) {
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notifications := make(chan NotificationReqs)
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defer close(notifications)
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h := NewNotificationHandler("alertmanager_url", "prometheus_url", notifications)
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receivedPost := make(chan bool, 1)
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poster := testHttpPoster{receivedPost: receivedPost}
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h.httpClient = &poster
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go h.Run()
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notifications <- NotificationReqs{
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{
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Summary: s.summary,
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Description: s.description,
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Labels: clientmodel.LabelSet{
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clientmodel.LabelName("instance"): clientmodel.LabelValue("testinstance"),
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},
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Value: clientmodel.SampleValue(1.0 / 3.0),
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ActiveSince: time.Time{},
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RuleString: "Test rule string",
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},
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}
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<-receivedPost
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if poster.message != s.message {
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t.Fatalf("%d. Expected '%s', received '%s'", i, s.message, poster.message)
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}
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}
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func TestNotificationHandler(t *testing.T) {
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scenarios := []testNotificationScenario{
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{
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// Correct message.
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summary: "{{$labels.instance}} = {{$value}}",
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description: "The alert value for {{$labels.instance}} is {{$value}}",
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message: `[{"Description":"The alert value for testinstance is 0.3333333333333333","Labels":{"instance":"testinstance"},"Payload":{"ActiveSince":"0001-01-01T00:00:00Z","AlertingRule":"Test rule string","GeneratorUrl":"prometheus_url","Value":"0.333333"},"Summary":"testinstance = 0.3333333333333333"}]`,
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},
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{
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// Bad message referring to unknown label.
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summary: "{{$labels.badlabel}} = {{$value}}",
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description: "The alert value for {{$labels.badlabel}} is {{$value}}",
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message: `[{"Description":"The alert value for \u003cno value\u003e is 0.3333333333333333","Labels":{"instance":"testinstance"},"Payload":{"ActiveSince":"0001-01-01T00:00:00Z","AlertingRule":"Test rule string","GeneratorUrl":"prometheus_url","Value":"0.333333"},"Summary":"\u003cno value\u003e = 0.3333333333333333"}]`,
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},
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{
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// Bad message referring to unknown variable.
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summary: "{{$labels.instance}} = {{$badvar}}",
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description: "The alert value for {{$labels.instance}} is {{$badvar}}",
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message: `[{"Description":"The alert value for {{$labels.instance}} is {{$badvar}}","Labels":{"instance":"testinstance"},"Payload":{"ActiveSince":"0001-01-01T00:00:00Z","AlertingRule":"Test rule string","GeneratorUrl":"prometheus_url","Value":"0.333333"},"Summary":"{{$labels.instance}} = {{$badvar}}"}]`,
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},
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{
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// Bad message referring to unknown struct field.
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summary: "{{$labels.instance}} = {{.Val}}",
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description: "The alert value for {{$labels.instance}} is {{.Val}}",
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message: `[{"Description":"The alert value for {{$labels.instance}} is {{.Val}}","Labels":{"instance":"testinstance"},"Payload":{"ActiveSince":"0001-01-01T00:00:00Z","AlertingRule":"Test rule string","GeneratorUrl":"prometheus_url","Value":"0.333333"},"Summary":"{{$labels.instance}} = {{.Val}}"}]`,
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},
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}
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for i, s := range scenarios {
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s.test(i, t)
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}
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}
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