alertmanager-irc-relay/http_test.go

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// Copyright 2018 Google LLC
//
// 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
//
// https://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 language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"net/http"
"net/http/httptest"
"reflect"
"strings"
"testing"
)
type FakeHTTPListener struct {
StartedServing chan bool
StopServing chan bool
AlertMsgs chan AlertMsg // kinda ugly putting it here, but convenient
router http.Handler
}
func (listener *FakeHTTPListener) Serve(_ string, router http.Handler) error {
listener.router = router
listener.StartedServing <- true
<-listener.StopServing
return nil
}
func NewFakeHTTPListener() *FakeHTTPListener {
return &FakeHTTPListener{
StartedServing: make(chan bool),
StopServing: make(chan bool),
AlertMsgs: make(chan AlertMsg, 10),
}
}
func MakeHTTPTestingConfig() *Config {
return &Config{
HTTPHost: "test.web",
HTTPPort: 8888,
MsgTemplate: "Alert {{ .Labels.alertname }} on {{ .Labels.instance }} is {{ .Status }}",
}
}
func RunHTTPTest(t *testing.T,
alertData string, url string,
testingConfig *Config, listener *FakeHTTPListener) *http.Response {
httpServer, err := NewHTTPServerForTesting(testingConfig,
listener.AlertMsgs, listener.Serve)
if err != nil {
t.Fatal(fmt.Sprintf("Could not create HTTP server: %s", err))
}
go httpServer.Run()
<-listener.StartedServing
alertDataReader := strings.NewReader(alertData)
request, err := http.NewRequest("POST", url, alertDataReader)
if err != nil {
t.Fatal(fmt.Sprintf("Could not create HTTP request: %s", err))
}
responseRecorder := httptest.NewRecorder()
listener.router.ServeHTTP(responseRecorder, request)
listener.StopServing <- true
return responseRecorder.Result()
}
func TestAlertsDispatched(t *testing.T) {
listener := NewFakeHTTPListener()
testingConfig := MakeHTTPTestingConfig()
expectedAlertMsgs := []AlertMsg{
AlertMsg{
Channel: "#somechannel",
Alert: "Alert airDown on instance1:3456 is resolved",
},
AlertMsg{
Channel: "#somechannel",
Alert: "Alert airDown on instance2:7890 is resolved",
},
}
expectedStatusCode := 200
response := RunHTTPTest(
t, testdataSimpleAlertJson, "/somechannel",
testingConfig, listener)
if expectedStatusCode != response.StatusCode {
t.Error(fmt.Sprintf("Expected %d status in response, got %d",
expectedStatusCode, response.StatusCode))
}
for _, expectedAlertMsg := range expectedAlertMsgs {
alertMsg := <-listener.AlertMsgs
if !reflect.DeepEqual(expectedAlertMsg, alertMsg) {
t.Error(fmt.Sprintf(
"Unexpected alert msg.\nExpected: %s\nActual: %s",
expectedAlertMsg, alertMsg))
}
}
}
func TestRootReturnsError(t *testing.T) {
listener := NewFakeHTTPListener()
testingConfig := MakeHTTPTestingConfig()
expectedStatusCode := 404
response := RunHTTPTest(
t, testdataSimpleAlertJson, "/",
testingConfig, listener)
if expectedStatusCode != response.StatusCode {
t.Error(fmt.Sprintf("Expected %d status in response, got %d",
expectedStatusCode, response.StatusCode))
}
}
func TestInvalidDataReturnsError(t *testing.T) {
listener := NewFakeHTTPListener()
testingConfig := MakeHTTPTestingConfig()
expectedStatusCode := 422
response := RunHTTPTest(
t, testdataBogusAlertJson, "/somechannel",
testingConfig, listener)
if expectedStatusCode != response.StatusCode {
t.Error(fmt.Sprintf("Expected %d status in response, got %d",
expectedStatusCode, response.StatusCode))
}
}