As we close in on the end of our comprehensive Free Tutorials for the Selenium Testing Tool, the tutorials we’re putting forward are now part of advanced Selenium instruction.
Our focus in the previous tutorial was on the Continuous Integration tool known as Hudson. This is a free, robust tool for creating the testing project, executing the test classes remotely, and sending a notification email to the stakeholders about the software status regarding passed and failed test cases.
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In this tutorial, we will delve into some advanced concepts that may directly or indirectly aid in improving the Automation framework and provide more clarity to users.
In this tutorial, we will cover the logging capability, its potential, and its debugging functionalities and much more.
Logging is sometimes deemed an added burden to the existing script creation process, but experts see it as a best practice when used appropriately due to its numerous benefits:
Benefits of Using Logging in Selenium Scripts:
- Provides a complete insight into the execution of test suites
- Log messages can be stored in external files for post-execution analysis
- Logs are exceptionally helpful in troubleshooting issues and faults during program execution
- Logs can also be reviewed to assess the health of the application by stakeholders
What You Will Learn:
Log4j – A Java-based Logging API
Turning to the technical details of logging, let’s explore the origin of the API that we’ll use throughout the log4j tutorial to generate logs. Log4j was developed as a result of the collaborative efforts of individuals at Secure Electronic Marketplace for Europe. The objective was to devise a utility for aiding log generation and hence log4j was introduced in 1996. Being an open-source tool, log4j is licensed under the IBM Public License.
Three main components constitute the implementation of log4j. These elements denote details about the log level, the formats in which log messages will be displayed, and how they will be saved.
Components of Log4j
- Loggers
- Appenders
- Layouts
#1) Loggers
To implement Loggers in the project, follow these steps:
Step 1: Create an instance of Logger class
Step 2: Define the log level
Logger Class – This is a Java-based tool containing all the generic methods already implemented, enabling us to use log4j.
Log Levels – Also called printing methods, log levels are employed to print the log messages. There are five main log levels.
- error()
- warn()
- information()
- debug()
- log()
To generate logs, we simply need to call any of the printing methods on the logger instance. We will look more broadly into this during the implementation phase.
#2) Appenders