How do you execute failed test cases in TestNG: Selenium WebDriver?

As an experienced tutor in automation testing registered on UrbanPro.com, I'm here to guide you on how to efficiently execute failed test cases in TestNG with Selenium WebDriver. This process is crucial for maintaining the stability and reliability of your test suites.

Executing Failed Test Cases in TestNG: Selenium WebDriver

1. Understanding TestNG's Rerun Mechanism

• TestNG's Rerun Feature:
  • TestNG provides a built-in mechanism to rerun failed test cases.
  • This ensures that only the failed tests are re-executed, saving time and resources.

2. Configuring TestNG to Rerun Failed Tests

• Configuring testng-failed.xml:

  • TestNG generates a file named testng-failed.xml containing the information about failed test cases.
  • This file is automatically created after the initial test run.

• Executing Rerun Command:

  • Use the following command to execute the failed test cases:
    bash

• • java -cp <path-to-testng-jar> org.testng.TestNG testng-failed.xml

3. Listener for Rerun Configuration

• IInvokedMethodListener Implementation:

  • Implement IInvokedMethodListener in a custom listener class.
  • Override the afterInvocation method to capture failed test cases.

• Rerun Logic:

  • In the custom listener, maintain a list of failed test methods.
  • After the initial test run, create the testng-failed.xml file with the failed methods.

4. TestNG Suite Configuration for Rerun

• Configure testng.xml for Rerun:
  • Create a new testng.xml file specifically for rerunning failed tests.
  • Include only the failed test methods in this configuration.

5. Run Rerun Configuration

• Execute Rerun Command:
  • Use the following command to execute the rerun configuration:
    bash

• • java -cp <path-to-testng-jar> org.testng.TestNG rerun-testng.xml

6. Parallel Execution in Rerun

• Parallel Execution Considerations:
  • If parallel execution is used, ensure that the rerun configuration is also set for parallel execution.
  • Maintain consistency in parallel settings between the initial run and the rerun.

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Conclusion

Rerunning failed test cases is a crucial aspect of maintaining a stable and reliable test suite. Connect with skilled tutors on UrbanPro.com to receive expert coaching, ensuring you have a strong understanding of implementing TestNG's rerun mechanism for Selenium WebDriver-based automation testing.