Learn API Testing using Postman, SoapUI & RestAssured (Udemy.com)

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