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how to create log files in selenium webdriver using Log4J

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[画像:log file in Selenium]

Hello welcome to Selenium Tutorials, in this post we will see how to create log files in selenium webdriver

In Automation, reporting plays an important role so we can generate the different type of HTML reports, XSLT report, Log files etc.

If you want to create enhanced report and with log attached to HTML report you can use extent report (I use this report) as well

Here is the YouTube video for the same

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What is Log File?

The log file is a just simple file, which keeps track of the record or event or info when any event happens or any software run. This whole process is known as logging. We can create a log file as simple log file as well as HTML format.

Note- Any file whose extension is .log will be considered.

Sample Log file
1- Simple log file in text format

log file in Selenium
log file in Selenium

2- Log files in HTML format

how to create log files in selenium
how to create log files in selenium

Why is it required in Selenium?

We can create a log file for our simple script also so we can track or debug our script easily if anything goes wrong in the script. For example, if our script is failing at some point then we can track back what went wrong.

What is log4J- Log4j is free open source tool given by Apache foundation for creating log files It helps us to generate a log file in various output target.

How to create log files in selenium

Step 1- Download log4j jar file

Click on the link to download http://mirrors.ibiblio.org/pub/mirrors/maven/log4j/jars/log4j-1.2.15.jar

Step 2- Add log4j to your current project

Select your project > Right click > Click on build path> Click Configure build path> Go to library section > Add external jar file > select the log4j > click on save

Step 3- Open notepad and copy the below code and save the file as log4j.properties.

Note- Please create the log folder inside home directory and while saving use "" to save file

// Here we have defined root logger
log4j.rootLogger=INFO,CONSOLE,R,HTML,TTCC
// Here we define the appender
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.TTCC=org.apache.log4j.RollingFileAppender
log4j.appender.HTML=org.apache.log4j.FileAppender
// Here we define log file location
log4j.appender.R.File=./log/testlog.log
log4j.appender.TTCC.File=./log/testlog1.log
log4j.appender.HTML.File=./log/application.html
// Here we define the layout and pattern
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= %5p [%t] (%F:%L)- %m%n
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d - %c -%p - %m%n
log4j.appender.TTCC.layout=org.apache.log4j.TTCCLayout
log4j.appender.TTCC.layout.DateFormat=ISO8601
log4j.appender.HTML.layout=org.apache.log4j.HTMLLayout
log4j.appender.HTML.layout.Title=Application log
log4j.appender.HTML.layout.LocationInfo=true

Once you save file it will look like

how to create log files in selenium
how to create log files in selenium

Step 4- Write test case

import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class Google {
  public static void main(String[] args) {
   
  // Here we need to create logger instance so we need to pass Class name for 
 //which we want to create log file in my case Google is classname
     Logger logger=Logger.getLogger("Google");
    
    // configure log4j properties file
    PropertyConfigurator.configure("Log4j.properties");
    // Open browser
    WebDriver driver = new FirefoxDriver();
    logger.info("Browser Opened");
   
    // Set implicit wait
    driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
    logger.info("Implicit wait given");
   
    // Load application
    driver.get("https://www.google.co.in/");
    logger.info("Url opened");
   
    // type Selenium
    driver.findElement(By.name("q")).sendKeys("Selenium");
    logger.info("keyword type");      
  }
}

Step 5- Execute your test case and verify the output and log files as well

Finally, here are three different log files.

how to create log files in selenium
how to create log files in selenium

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Reader Interactions

Comments

  1. Pankaj says

    Hi Mukesh,
    good ,i am beginner is selenium but you explain very well about loggers. My question is that can we make excel file of log instead of normal text file??

  3. Rajesh says

    Hi Mukesh,

    Is it possible to catch test steps, results into log file without calling log in test steps

  4. Hare Krishna says

    I left the same comment under your video about how to generate log files. In case you see this first please help.

    Mukesh, thank you a lot. I am learning like in a good school from you. Would you know how to add clickable line # in Intelije? I used the same and tried other log4j file content and I am getting this:

    0 [main] INFO RandomPractice – Google is launched
    17 [main] INFO RandomPractice – Search field is located
    143 [main] INFO RandomPractice – Hare Krishna is entered
    2126 [main] WARN RandomPractice – Searching for the entered text

    Whereas I am aiming for getting what you have in the video. I ‘ve heard Inlelije works differently. I have my “log4j.properties” file, may be you can advise what I can add to get the clickable line # or may be there is another way. So far after going to so many blogs, I haven’t figured that out. Thank you very much. All the best to you!

  6. Sourabh says

    I have implemented this and its working fine but I want to override the existing log file whenever I run the code but currently it appends the new logs in the previous log file

  7. suyash says

    Hi,
    I am getting this
    log4j:ERROR Ignoring configuration file [Log4j.properties].
    log4j:WARN No appenders could be found for logger
    log4j:WARN Please initialize the log4j system properly.

  8. divya says

    Hai Mukesh,
    Im starter in automation selenium, ur posts are very useful for step by step procedure..Thanks for ur effort..

  11. shalaka says

    Hi Mukesh,
    Very helpful post for generating logs. I have a question that when the code in eclipse is big enough, it is tedious job to write logger.info(“”); statement after every line. Is there a way out?

  13. Nikhil says

    Mukesh how do we configure properties file for Log4j, because it varies for project to project. Is there any site we can learn from

  15. chandrika says

    Hi Mukesh.

    I have tried to generate logs its generating in console only not into file.
    When i tried to save save log4j.properties file with double quotes its saved as log4j.properties not like log4j.
    Please help me in this.

  17. Nikhil says

    Mukesh very good explananation. How do we learn how to configure log4j properties file?

    Also what is this line meaning – PropertyConfigurator.configure(“Log4j.properties”);

  18. Pratikshya says

    Hi Mukesh

    Very nice Explanation. Thank you . I have one doubt . I have used Logger.info in my selenium script and it works fine when I run in local eclipse. But when I run the same program in jenkins , it gives warning for Logger File. Why the same Logger configuration didnt work in Jenkins ?

  19. suresh says

    hi mukesh,

    I am using extent report with attach screenshot but how can I specify the path of failure screenshot.
    screenshot like gmail.08082016121213.png
    it will be generating at failure time and how, I want to take that one’s path as specify in report path

  20. Ajay Somni says

    Hi Mukesh, Thanks for your valued contribution to the tech community.
    Kindly provide a tutorial on new backlog. Thanks

  21. ganesh says

    how can i append the error code in exception block to the log file. logger.info is not working in catch block.

  26. Siddharth says

    Hi Mukesh

    Right now I am unable to download the log4j jar file from the above mentioned url given by you.

    Can you please check this once.

  29. Prabhakar Reddy Gollapudi says

    Hi Mukesh,
    I am following you from last 2 weeks and i found your blog very useful,completely different from other one.
    Keep posting new things and make the people know more 😛

  33. Rajiv says

    Hello Mukesh,

    I am using maven and try to save the log results in log file. Results are printing on console but not same in log files files: Following is the console out put.
    ————————————————————–
    Dec 10, 2015 11:58:13 AM pageTests.log4j main
    INFO: Browser Opened
    Dec 10, 2015 11:58:25 AM pageTests.log4j main
    INFO: Implicit wait given
    Dec 10, 2015 11:58:25 AM pageTests.log4j main
    INFO: Url opened
    Dec 10, 2015 11:58:28 AM pageTests.log4j main
    INFO: keyword type
    —————————————————————-

    How can I save logs under log file in maven. I have log4j included dependencies in pom.xml file.

    —
    Rajiv

  34. Matt W says

    How can I catch an error using this. I’m hitting or using the Firefox driver with C#. What is happening for me is that my tests run successfully in Visual Studio or from a command line outside of our TFS Build process, but during the build, the same test case keeps failing. I’m able to capture a screenshot on error, but it isn’t very helpful.

    I’d like to see if a control can’t be found, it times out, etc. Would this be the tool for me.

    Any help to catch errors in the log if this tool will work for me would be greatly appreciated!!

  36. AthenaTietjen9 says

    Hi there, just became aware of your blog through Google, and found that it is really informative. I’m going to watch out for brussels. I’ll be grateful if you continue this in future. A lot of people will be benefited from your writing. Cheers!

  37. TyreeKeener28 says

    Nice post. I was checking continuously this blog and I am impressed! Extremely useful info particularly the last part 🙂 I care for such information much. I was seeking this certain information for a long time. Thank you and best of luck.

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