Table of contents
1.
Introduction
2.
Postman
3.
Newman in Postman
4.
NPM
4.1.
How to install Node.js
4.2.
How to install Node Package Manager
4.3.
Installing and running Newman
5.
Installing Newman
5.1.
Running Newman
6.
Example collection with failing tests
6.1.
Using Newman with CI/CD
6.2.
Using Newman as a Node.js library
7.
Frequently asked questions
7.1.
Does Newman require Postman?
7.2.
How do I run multiple Postman collections with Newman?
7.3.
What is the difference between Postman and Newman?
7.4.
Is Newman a free tool?
7.5.
How do I run all Postman collections?
8.
Conclusion
Last Updated: Mar 27, 2024

Installing and running Newman in Postman

Author Muskan Sharma
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Introduction

While making, sharing, and testing the APIs, you used the API client called Postman. 

So in Postman, there is Newman which is a Command-line Collection runner, which you can immediately use to execute and test a Postman Collection.

So in this article, you will learn about Installing and running Newman in Postman.

Let's dive into the topic to explore more.

Postman

With the help of Postman, developers can easily design, share, test, and document APIs.

Newman in Postman

For Postman, Newman is a collection runner on the command line. It enables simple running and testing of a Postman collection from the command line. It is designed to be extensible to quickly combine it with your build systems and continuous integration servers.

NPM

The default package manager for Node.js is called Node Package Manager, or NPM, and it is a package manager for Javascript. It functions as a sort of project repository and is aware of the specifications each project must meet.

The JS (Javascript) developers can publish their code and issues on a repository with ease, thanks to NPM. Then, you can use this code again in your subsequent projects or for anyone else who needs the functionality you have already created. This makes it incredibly simple for developers to code faster and more effectively.

How to install Node.js

As previously said, our website already has a tutorial for you to use to install node.js. Before proceeding to the page, you must verify that node.js has not already been installed on your computer.

  • Launch the Command Prompt (Terminal for Mac)
  • Fill in the following.
    • node -v (for windows)
    • node --version (for mac)
  • If you see a version number, node.js has already been set up, and you don't need to do anything else.
  • You must install node.js if you encounter errors or anything other than the version number.

Additionally, you must have NPM installed on your PC if you followed the instructions for installing node js on our website.

How to install Node Package Manager

  • Launch the command prompt (terminal for mac)
  • Fill out the following command prompt field.
    •  npm -v in windows
    • npm --version in Linux/mac
  • If a version number appears as you hit Enter, npm is already set up, and you can move on to installing Newman.
  • If you don't see a version, you may need to reinstall it using the instructions on our website, then recheck.

Installing and running Newman

Install Node.js first, then Newman to get started with Newman. You can then execute your collections.

Installing Newman

  1. Node.js is used to build Newman. Make sure to have Node.js installed before running Newman. To get Node for your CI's platform, follow the instructions. (Note that certain CI systems include settings that install Node beforehand.) Make sure you're using Node.js version 4 or higher.
  2. Install Newman from npm globally so that you may execute it from any location:
$ npm install -g Newman

Running Newman

Running Newman with a collection is the most straightforward method. Any collection file on your file system can be run.

A collection can be exported as a file for sharing.

$ newman run mycollection.json

By sharing a collection, you may also send it as a URL.

Environment variables are probably used by your collection. Export the template from Postman and run it with the -e flag to provide a supplementary set of environment variables.

$ newman run https://www.postman.com/collections/cb208e7e64056f5294e5 -e dev_environment.json

Example collection with failing tests

Collection with failing tests

All test and request results can be exported to a file. To store the output into a file, use the JSON reporter and a filename.

$ newman run mycollection.json --reporters cli,json --reporter-json-export outputfile.json

To perform tests and pre-request scripts, Newman enables you to utilize all libraries and objects that Postman supports.

Using Newman with CI/CD

If everything goes according to plan and there are no errors, Newman defaults to exiting with a status code of 0. Your continuous integration tools can be set up to respond to Newman's exit codes and pass or fail a build in accordance. If a test case fault occurs with a status code of 1, you can use the —bail flag to force Newman to stop the run so that your CI tool or build system can catch it.

Using Newman as a Node.js library

Newman was designed from the start-up to be a library. It can be modified and applied in many ways. You can implement it in your Node.js code as follows:

var newman = require('newman'); // require Newman in your project
// call newman.run to pass `options` object and wait for callback
newman.run({
    collection: require('./sample-collection.json'),
    reporters: 'cli'
}, function (err) {
    if (err) { throw err; }
    console.log('collection run complete!');
});

Frequently asked questions

Does Newman require Postman?

For Postman, Newman is a command-line Collection Runner. You can use the command line to immediately execute and test a Postman Collection.

How do I run multiple Postman collections with Newman?

When running multiple Postman collections or a single Postman collection in different contexts, we must use different command lines, such as newman run "file1. json" and "file2. json." -e <env1.

What is the difference between Postman and Newman?

For Postman, Newman is a collection runner on the command line. It enables simple running and testing of a Postman collection from the command line.

Is Newman a free tool?

A free and open-source utility is Newman. It offers strong functionality to execute Postman collections by utilizing Postman's extremely helpful features, such as Tests, Assertions, Pre-request scripts, etc., and running the collection from the command line.

How do I run all Postman collections?

The collection you want to run can be found under Collections on the sidebar. Run. Drag a collection from Collections or History in the sidebar and start running from the Postman footer.

Conclusion

This blog has extensively discussed Installing and running Newman in Postman. We hope this blog has helped you enhance your knowledge about Installing and running Newman in Postman. If you want to learn more, check out the excellent content on the Coding Ninjas Website:

Testing tools for mobile applicationsThe Basics of Software Testing & various testing methods, and what are the best practices for well-defined REST APIs

Recommended Readings:

NPX vs NPM

wc command in linux

Refer to our guided paths on the Coding Ninjas Studio platform to learn more about DSA, DBMS, Competitive Programming, Python, Java, JavaScript, etc. 

Refer to the links problemstop 100 SQL problemsresources, and mock tests to enhance your knowledge.

For placement preparations, visit interview experiences and interview bundle.

Thank You

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