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Debugging techniques in Katalon Studio for Faster Issue Resolution

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Debugging is a fundamental aspect of software development and testing, aiding in the identification and resolution of issues within the application under test to ensure a reliable and bug-free final product. In Katalon Studio, various debugging techniques can be employed to expedite issue resolution and enhance test quality. This blog post will delve into some of the most effective debugging methods in Katalon Studio to streamline problem-solving processes.

Debug Mode

Debug mode in Katalon Studio is a potent tool that allows users to step through test case code line by line, facilitating the pinpointing of the exact location where a test case failed. By enabling debug mode, users can efficiently identify issues and make necessary adjustments to rectify them. To activate debug mode, simply click on the Debug button located on the Katalon Studio toolbar.


Console Logs

Console logs are a simple yet effective debugging technique in Katalon Studio. They allow you to output important information about the application under test, such as variable values, object properties, or error messages. By analyzing the console logs, you can quickly identify the root cause of the issue and take appropriate actions to fix it.



Breakpoints are a valuable debugging tool in Katalon Studio, allowing users to mark specific lines of code where the test case execution will pause. This pause enables users to inspect the application state at that point and make necessary code changes to address any issues.


Watch Expressions

Watch expressions in Katalon Studio are a valuable debugging feature that enables users to monitor the value of specific variables throughout test case execution. By adding a watch expression to a variable, users can track its value and observe how it evolves over time. This functionality is instrumental in identifying issues related to variable values and facilitating the implementation of corrective actions to resolve them.


Conditional Breakpoints

Conditional breakpoints in Katalon Studio are a type of breakpoint that allows you to pause the execution of a test case only when a specific condition is met. This feature is useful when you want to inspect the application state only when a certain event occurs. For example, you can set a conditional breakpoint to pause the test case when a specific object is not found, enabling you to investigate the issue and take the necessary steps to fix it.


Using print statements for debugging in Katalon Studio

To use print statements for debugging in Katalon Studio, you can write messages to the Log File Viewer. Here’s how you can do it:

  1. Write Messages to Log File Viewer:
    • Use print statements or log messages in your test scripts to output status messages and test information to the Log File Viewer in Katalon Studio. This allows you to track the progress of your test execution and debug issues effectively.
  2. Utilize Log Levels:
    • Katalon Studio’s execution log displays detailed information about actions performed during test runs, including full test step statements and desired capabilities information. Log levels are color-coded for different levels like INFO, DEBUG, WARNING, and ERROR, providing an easier view of the execution log.
  3. Customize Console Log:
    • Customize the console log to display the progress of test execution and debug better by utilizing the extensive logs provided by Katalon Studio. This includes ANSI color-coded log levels and detailed information about the test run.
  4. View Execution Logs:
    • After your test cases or test suites finish execution, review the results in the Log Viewer tab in Katalon Studio. You can filter the logs based on different categories like Info, Passed, Failed, Error, Warning, and Not Run to focus on specific types of messages.

Common Errors encountered during debugging in Katalon Studio

Some common errors encountered during debugging in Katalon Studio include:

  1. Element Not Found:
    • This error occurs when the automation script cannot locate a specific element on the web page, leading to test failures. It can be due to incorrect locators or dynamic page elements that are not loaded properly.
  2. Timeout Issues:
    • Timeout errors may occur when the script takes longer than expected to interact with an element or load a page. Adjusting wait times and synchronization strategies can help resolve these issues.
  3. Data Mismatch:
    • Errors related to data mismatch can occur when the expected data does not match the actual data retrieved during test execution. This can be due to incorrect test data or issues with data handling in the script.
  4. Script Logic Errors:
    • Logical errors in the script can lead to unexpected behavior and failures during test execution. Reviewing and debugging the script logic is essential to identify and rectify such errors.
  5. Environment Configuration Problems:
    • Errors related to environment configurations, such as incorrect browser settings or incompatible versions of web drivers, can cause issues during test execution. Ensuring proper environment setup is crucial for smooth testing.
  6. Dependency Issues:
    • Problems with dependencies, like missing libraries or incorrect configurations, can result in errors during script execution. Resolving dependency issues is vital for successful test automation.
  7. Network Connectivity Problems:
    • Issues with network connectivity can lead to test failures, especially when interacting with web services or APIs. Ensuring stable network connections during test execution is important to avoid such errors.


In conclusion, Katalon Studio provides a wide range of powerful debugging tools that can help you to identify and fix issues in your test cases quickly and efficiently. By using the techniques outlined in this blog post, you can speed up the issue resolution process, improve the quality of your tests, and deliver a more reliable and bug-free application.

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Sanket Dudhe

Sanket Dudhe is a Technical Consultant at Perficient. He has an experience of 4+ years as SDET. He loves technology and hence is curious to learn about new emerging technologies #lovefortechnology.

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