Learn API Testing using Postman, SoapUI & RestAssured | Udemy

Course Overview: Mastering Back-End Testing and API Automation

In today’s digital landscape, web applications heavily rely on seamless communication through web services. The dominant architecture, Representational State Transfer (REST), has become a cornerstone in modern web service development. This course aims to transform you into a proficient back-end testing expert, equipping you with the skills to navigate the evolving IT industry landscape.

Module 1: Introduction to API Testing

Client-Server Architecture

• Understanding the Basic Architecture
• Roles of Client and Server

API Basics

• What is an API?
• Why API Testing is Needed?
• Types of APIs
• SOAP vs. REST

Understanding Web Services

• API vs. Web Service
• REST API Fundamentals
• REST API Methods (GET, POST, PUT, DELETE)
• HTTP vs. HTTPS
• HTTP Status Codes

Module 2: API Testing with Postman

• Postman Introduction
  • Postman Installation
  • Creating Workspace
  • Creating Collections
  • Creating HTTP Requests (GET, POST, PUT, DELETE)
  • Saving & Editing Requests
  • Operations on Collections
• Response Validation
  • Status Codes
  • Cookies
  • Headers
  • Response Body
  • Schema
• Exporting & Importing Collections
• Creating Dummy APIs for API Testing
  • NodeJS Installation
  • JSON-Server Installation
• JavaScript Object Notation (JSON) & JSON Path
  • What is JSON?
  • Understanding JSON Object & JSON Array
  • JSON Path
• Validating Responses (Chai Assertions)
  • Testing Status Codes
  • Testing Headers
  • Testing Cookies
  • Testing Response Time
  • Testing Response Body
• Scripts in Postman
  • Pre-request Scripts
  • Test Scripts (Post Response Scripts)
  • JSON Schema Validation
• Working with Variables
  • Global Variables
  • Collection Variables
  • Environment Variables
  • Local Variables
  • Data Variables
  • Set, Get & Unset Variables with Scripts
• Postman Console
• Chaining Requests
• Customize Collection Run Order(Work flow)
• Working with Data Variables/External Variables
• Data-Driven Testing
  • Using JSON Files
  • Using CSV Files
• File Upload & Download API Requests
• Authorization Types
  • Basic Authorization
  • Digest Authorization
  • API Key
  • Bearer Token
  • OAuth2
• Project Work -Online Store
  • API testing Reference documents
  • Writing API Test Cases
  • Creating Collections & Adding Requests
  • Adding Scripts (Chai Assertions)
  • Running Collections Manually
  • Scheduling Runs
• Newman CLI
  • Install Newman
  • Install newman-reporter-html for Reporting
  • Exporting and Sharing Collections from Postman
  • Run Collections Locally via Command Prompt
  • Push Collections to GitHub and Run in Jenkins
• Postman CLI
  • Install Postman CLI
  • Use Postman CLI to Run a Collection from Command Line
  • Set Up GitHub Actions with Postman CLI to Run Collections in CI/CD Pipeline
• Documenting APIs
  • Create Public Documentation
  • Write Markdown Descriptions at Request, Folder, or Collection Level
  • Embed “Run in Postman” Button with Documentation
  • Preview Docs Before Publishing
  • Publish to API Network
  • Swagger
  • cURL

• Mocking APIs
  • Set Up Mock Servers
  • Create Dynamic Mock Responses
• Performance Testing
  • Run a performance test
  • Types of Load profiles in Postman
  • View performance test metrics
  • Inject data into virtual users

• GraphQL
  • What is GraphQL?
  • GraphQL vs REST
  • GraphQL Core Concepts
  • GraphQL Queries – Fetching data
  • GraphQL Mutations – Writing data
  • GraphQL Subscriptions – Realtime updates
  • Create GraphQL requests in Postman
  • Postman GraphQL interface

Module 3: API Testing with RestAssured

Introduction to RestAssured

• Overview and Importance

Setting up a RestAssured Maven Project

• Install JDK & Eclipse IDE
• Creating maven Project & Add dependencies
• Configuring IDE and TestNG

Writing API Automation Scripts

• HTTP Methods: GET, POST, PUT, DELETE
• Different ways to Create Request Body/Payload
  • Using HashMap
  • Using org.json library
  • Using POJO Class
  • Using External JSON File
• Handling Parameters
• Path Parameters
• Query Parameters
• Headers and Cookies

Authentication Types

• Basic Authentication
• Digest Authentication
• Preemptive Authentication
• OAuth 1 and OAuth 2

File Upload & Download (Form parameters)

Parsing Response Body

• Parsing JSON and XML Response body
• JSON Schema and XML Schema/XSD Validations

Advanced RestAssured Features

• API Chaining
• Serialization and Deserialization
• Request and Response Specification Builders
• Root Path
• Logging

RestAssured with GraphQL

• Handling GraphQL Queries
• Handling GraphQL Mutations

Framework Development

• Building a RestAssured Framework
• Creating Maven Project & Folder Structure
• API End Point(Routes)
• Understanding Schemas & Models
• Creating of POJO Classes
• Creating Payloads
• Creating Configuration & Test Data files
• Creating API Tests and add validations
• Generating Extent & Allure Reports
• Running Tests using TestNG(Serial & Parallel mode)

CI & CD

• Working with Git & Github
• Integration with Jenkins

Bonus Lectures:

• API Testing with SoapUI & Ready API