Using Postman CLI -Newman Beginners guide

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Postman is a powerful tool for testing and debugging APIs. However, when it comes to testing APIs that require authentication or authorization, there are some additional steps you need to take to ensure that your tests are secure. In this blog post, we'll share some tips and tricks for using Postman to test secure APIs, including how to use Postman's command-line interface (CLI) to automate your tests.

  1. Use environment variables for sensitive data When testing APIs that require sensitive data such as API keys, usernames, and passwords, it's important to keep this information secure. One way to do this is by using environment variables in Postman. This allows you to store sensitive data in a secure location, separate from your test scripts. You can define environment variables in the Postman UI or using the Postman CLI with the following command:
newman run <collection-file> -e <environment-file>
  1. Set up authentication and authorization If your API requires authentication or authorization, you'll need to set this up in Postman. You can do this by adding the appropriate headers or tokens to your requests. Postman also has built-in support for OAuth 1.0a, OAuth 2.0, and Basic Auth, which makes it easy to test APIs that use these authentication methods. You can include authorization headers in your API requests by using the Postman CLI with the following command:
newman run <collection-file> -e <environment-file> --env-var <auth-header>
  1. Use collections and folders for organization If you're testing multiple APIs or endpoints, it can be helpful to organize your tests into collections and folders. This makes it easier to find and run specific tests, and also helps to keep your tests organized and manageable. You can export collections from the Postman UI and run them using the Postman CLI with the following command:
newman run <collection-file>
  1. Save and share collections for collaboration Postman allows you to save and share collections with your team members. This makes it easy to collaborate on testing, share test results, and ensure that everyone is using the same test scripts. You can export collections from the Postman UI and share them with your team members or run them using the Postman CLI.

  2. Use Postman's testing and scripting features Postman has a powerful scripting engine that allows you to automate your tests and perform complex operations. You can use Postman's scripting features to write tests, extract data from responses, and perform other operations that help to ensure the security and accuracy of your tests. You can run scripts using the Postman CLI with the following command:

newman run <collection-file> -e <environment-file> --script <test-script>
  1. Monitor API performance and uptime Postman also allows you to monitor API performance and uptime. You can set up tests to run at regular intervals and receive alerts if there are any issues with the API. You can run automated tests using the Postman CLI with the following command:
newman run <collection-file> -e <environment-file> --reporters <reporter>

By following these tips and tricks and using Postman's CLI, you can use Postman to test secure APIs with confidence. Postman is a powerful and flexible tool that can help you to streamline your API testing process, improve your testing accuracy, and ensure the security of your API tests.