GetLogEvents_test.go
/*
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
This file is licensed under the Apache License, Version 2.0 (the "License").
You may not use this file except in compliance with the License. A copy of
the License is located at
http://aws.amazon.com/apache2.0/
This file 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 (
"encoding/json"
"io/ioutil"
"strconv"
"testing"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
)
type Config struct {
Limit int64 `json:"Limit"`
LogGroupName string `json:"LogGroupName"`
LogStreamName string `json:"LogStreamName"`
}
var configFileName = "config.json"
var globalConfig Config
func getLogGroupStreamNames(sess *session.Session, groupIndex int) (string, string, error) {
svc := cloudwatchlogs.New(sess)
resp, err := svc.DescribeLogGroups(nil)
if err != nil {
return "", "", err
}
if groupIndex < len(resp.LogGroups) {
logGroupName := resp.LogGroups[groupIndex].LogGroupName
result, err := svc.DescribeLogStreams(&cloudwatchlogs.DescribeLogStreamsInput{
LogGroupName: logGroupName,
})
if err != nil {
return "", "", err
}
return *logGroupName, *result.LogStreams[0].LogStreamName, nil
}
return "", "", nil
}
func populateConfiguration(t *testing.T) error {
content, err := ioutil.ReadFile(configFileName)
if err != nil {
return err
}
text := string(content)
err = json.Unmarshal([]byte(text), &globalConfig)
if err != nil {
return err
}
t.Log("Limit: " + strconv.Itoa(int(globalConfig.Limit)))
t.Log("LogGroupName: " + globalConfig.LogGroupName)
t.Log("LogStreamName: " + globalConfig.LogStreamName)
return nil
}
func TestGetLogEvents(t *testing.T) {
sess := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
}))
err := populateConfiguration(t)
if err != nil {
t.Fatal(err)
}
if globalConfig.Limit < 1 {
globalConfig.Limit = 1
}
if globalConfig.Limit > 100 {
globalConfig.Limit = 100
}
logGroupIndex := 0
gotEvents := false
var Resp *cloudwatchlogs.GetLogEventsOutput
for !gotEvents {
globalConfig.LogGroupName, globalConfig.LogStreamName, err = getLogGroupStreamNames(sess, logGroupIndex)
if err != nil {
t.Fatal(err)
}
Resp, err = GetLogEvents(sess, &globalConfig.Limit, &globalConfig.LogGroupName, &globalConfig.LogStreamName)
if err != nil {
t.Fatal(err)
}
length := len(Resp.Events)
if length > 0 {
gotEvents = true
} else {
globalConfig.LogGroupName = ""
globalConfig.LogStreamName = ""
gotEvents = false
logGroupIndex++
}
}
t.Log("Event messages for stream " + globalConfig.LogStreamName + " in log group " + globalConfig.LogGroupName)
for _, event := range Resp.Events {
if nil != event.Message {
t.Log(" ", *event.Message)
}
}
t.Log("Got " + strconv.Itoa(len(Resp.Events)) + " event(s) for log stream " + globalConfig.LogStreamName + " in log group " + globalConfig.LogGroupName)
}