? Newman Command Line Tool

? Quick Overview

Newman is a powerful command-line tool that allows you to run and test Postman collections directly from the terminal. It is commonly used in CI/CD pipelines for automated API testing.

? Key Concepts

Runs Postman collections without GUI
Supports JSON environment files
Generates test reports
Works with CI/CD tools

? Syntax / Theory

Newman works by executing exported Postman collections using Node.js. You interact with it entirely through the command line.

? Code Example(s)

? View Code Example

// Install Newman globally using npm
npm install -g newman

? View Code Example

// Run a Postman collection file
newman run MyCollection.json

? View Code Example

// Run collection with environment variables
newman run MyCollection.json -e MyEnvironment.json

? Live Output / Explanation

? Output Explanation

Newman displays detailed results including request status, response time, assertions passed/failed, and summary statistics directly in the terminal.

? Interactive Example / Visual Flow

The following flow shows how Newman fits into API testing:

Design API in Postman
Export Collection & Environment
Run via Newman CLI
View terminal or HTML reports

user@dev:~$ Click 'Run' to simulate Newman...

?️ Use Cases

Automated API regression testing
CI/CD pipeline integration
Headless API execution
Team-wide test automation

✅ Tips & Best Practices

Always version-control your collections
Use environment files for flexibility
Enable reporters for readable test results
Run Newman in CI for early bug detection

? Try It Yourself

Install Node.js and Newman
Create a simple Postman collection
Export and run it using Newman
Experiment with environment variables