Solving the Enigma: Displaying TestNG Reports in Jenkins for Postman Tests

Are you struggling to display your TestNG reports in Jenkins for your Postman tests? Don’t worry, you’re not alone! Many developers have been in your shoes, scratching their heads, trying to figure out why their reports aren’t showing up. But fear not, dear reader, for today, we’ll embark on a journey to demystify this puzzle and provide you with a step-by-step guide to get those reports shining bright in your Jenkins dashboard.

Understanding the Problem

Before we dive into the solution, let’s understand why this issue occurs in the first place. Postman tests are typically executed using the Newman command-line collection runner, which doesn’t inherently integrate with Jenkins. TestNG, a popular testing framework, generates reports in various formats, but Jenkins can’t magically pick them up without some configuration. It’s like trying to fit a square peg into a round hole – it just won’t work!

Prerequisites

Before we begin, make sure you have the following set up:

• A Jenkins instance with the TestNG Plugin installed and configured.
• Postman tests executed using the Newman command-line collection runner.

Step 1: Configure Jenkins to Publish TestNG Reports

In your Jenkins job configuration, add a Post-build Action to publish the TestNG reports:

  1. In your Jenkins job, click on the "Configure" button.
  2. Scroll down to the "Post-build Actions" section and click on the "Add post-build action" button.
  3. Select "Publish TestNG Results" from the dropdown list.
  4. In the "TestNG XML reports" field, enter the path to your TestNG report file (e.g., target/surefire-reports/testng-results.xml).
  5. Click "Save" to save your changes.

Step 2: Configure Newman to Generate TestNG Reports

Modify your Newman command to generate TestNG reports:

  1. Update your Newman command to include the --test-ng-reporter option, specifying the report format and output file:
  newman run "My Collection" -e  --test-ng-reporter json > target/testng-results.json
  2. This will generate a TestNG report in JSON format and save it to the specified file.

Step 3: Convert TestNG Report to Jenkins-compatible Format

Since Jenkins doesn’t support JSON reports out-of-the-box, we need to convert our TestNG report to a format Jenkins can understand, like JUnit:

  1. Install the testng-xslt plugin using your package manager (e.g., Maven or npm).
  2. Add a Maven or npm script to your project to convert the TestNG report:
  xsltproc -o target/testng-results-junit.xml target/testng-results.json xslt/testng-junit.xsl
  3. This will convert the JSON report to a JUnit-compatible XML file.

Step 4: Configure Jenkins to Publish the Converted Report

Update your Jenkins job configuration to publish the converted report:

  1. In your Jenkins job, click on the "Configure" button.
  2. Scroll down to the "Post-build Actions" section and click on the "Add post-build action" button.
  3. Select "Publish JUnit test report" from the dropdown list.
  4. In the "Test report XMLs" field, enter the path to your converted report file (e.g., target/testng-results-junit.xml).
  5. Click "Save" to save your changes.

Step 5: Verify Your Setup

Congratulations! You’ve made it to the final step. Run your Postman tests in Jenkins and verify that the TestNG reports are displayed correctly:

1. Trigger a build of your Jenkins job.
2. Once the build completes, click on the “Test Result” link on the left-hand side of the Jenkins dashboard.
3. Verify that the TestNG report is displayed, including the test results and other relevant information.

Troubleshooting Tips

Still stuck? Here are some common issues and their solutions:

Issue	Solution
Reports not showing up in Jenkins	Check that the report file path is correct and the file exists. Ensure the Jenkins plugin is configured correctly.
Newman command not generating reports	Verify that the --test-ng-reporter option is correctly specified and the output file path is valid.
Conversion script not working	Check that the testng-xslt plugin is installed and the XSLT script is correctly configured.

Conclusion

Voilà! With these steps, you should now be able to display your TestNG reports in Jenkins for your Postman tests. Remember to double-check your configurations, and don’t hesitate to reach out if you encounter any issues. You’ve conquered the enigma, and your Jenkins dashboard is now shining bright with your beautiful TestNG reports!

Happy testing, and may the reports be ever in your favor!

Frequently Asked Question

Having trouble displaying TestNG reports for Postman tests in Jenkins? Don’t worry, we’ve got you covered!