JSONPlaceholder API Contract Tests

This repository contains automated API contract and health tests for the public JSONPlaceholder API using Postman.
The goal is to ensure response structure, data types, and status codes remain consistent with the documented API behavior.

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🚀 Overview

This project validates:

• HTTP status codes
• Response times
• JSON schema/contract for posts

Tests run automatically using:

• Postman
• Newman
• GitHub Actions CI pipeline

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📁 Project Structure

/postman/
  ├── JSONPlaceholder_API_Contract_Tests.postman_collection.json
  └── Development_Environment.json
.github/workflows/
  └── api-tests.yml

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🧪 How to Run Locally

1. Install Newman

npm install -g newman

2. Run the Collection

newman run "postman/JSONPlaceholder_API_Contract_Tests.postman_collection.json" -e "postman/Development_Environment.json"

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API Under Test

All tests run against:

https://jsonplaceholder.typicode.com

The base URL is configured via the baseUrl environment variable in the environment file.

Continuous Integration (GitHub Actions)

This project includes a CI pipeline that automatically runs all API tests on:

Every push

Every pull request