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