Creating a Postman Collection

Step 1: Head to the Postman Application and create a new workspace or use the existing workspace as per your requirement. Then navigate to the workspace be in the collections tab and click on the ‘+’ symbol on the right of your page as shown below:

Step 2: Click on ‘+’ and then choose and then choose ‘Blank Collection’ and then name the collection and add the requests as per your requirement.

How to Run Postman Scripts from Newman CLI Commands

Postman is an API development tool that allows developers to create, test, and manage APIs effortlessly. This helps in simplifying the testing and validation of APIs during the development process. In simple terms, it is an API that acts as a bridge that allows the different applications to communicate with each other. And one of the major key features is automated testing where developers can create scripts to validate API responses automatically. In this tutorial, we will see how to run Postman collections using Newman CLI (Command Line Interface).

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Prerequisites

Node.js installed in your system Having Knowledge about how API works Knowledge about Postman. Knowledge about Jenkins....

Creating a Postman Collection

Step 1: Head to the Postman Application and create a new workspace or use the existing workspace as per your requirement. Then navigate to the workspace be in the collections tab and click on the ‘+’ symbol on the right of your page as shown below:...

Exporting Postman Collection

Step 1: After creating the requests successfully in your collection we need to download the collection to our local system....

Installing Newman

Step 1: To run Newman, make sure your system has Node.js installed. To check that open your command prompt and run the below command. If it returns the version as shown in the below image proceed to the further steps else Check here for installation....

Running Postman Scripts with Newman CLI

Step 1: Now open the local terminal and run the below command...

Command-line Options and Configuration

Command Usage newman run This command is used to execute API tests which we have exported to our local system newman run -e Executes a collection in a specified environment newman run -g This command is used to run API tests and apply global variables used in that collection newman run -n Used to run the collection n times newman run –delay-request Used to Configure delay time in between requests...

Running Collections with Global and Local Environments

Step 1: Follow the same above-mentioned steps additionally you need to download the global environment to your local system before exporting the environment make sure that the variable value is in ‘initial value’ and on the right corner you see the option ‘Export’ as shown in the image and simply click on that the environment will be downloaded to your local system....

Automating Postman Tests with Continuous Integration using Jenkins

Step 1: First make sure your system has Jenkins installed if not install Jenkins by using this guide. Then start the Jenkins server by running the below command and make sure you are in the correct directory before running the command....

Troubleshooting and Best Practices

While writing the command in the Jenkins project make sure that you copy the correct path of the file and write it else at the stage of building your project you will not get the expected output. Double-check all file paths (i.e., collection, environment, global environment) used in the Newman command’s incorrect path may lead to errors. If your collection uses environment or global variables, confirm they are properly defined and exported. You can include logging commands like -r cli,json to note detailed results for analysis and a y troubleshooting issues. Keep your postman collection and scripts under version control to track the changes and ensure consistency across builds and regularly review your automated tests to ensure optimized performance....

Conclusion

In conclusion, running Postman scripts from the Newman CLI command provides an efficient way to automate the testing of APIs and also it enables the developers/users to execute the API test collection without the need for GUI (Graphical User Interface)....