API Testing (Postman + Rest Assured)

Official Curriculum

API Testing (Postman + Rest Assured)

Comprehensive, zero-to-architect syllabus crafted for enterprise SDET and backend automation roles by Mohit Kumar.

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4 Comprehensive Modules • 43 Enterprise Topics • 100% Practical Labs

HTTP Methods & Architecture

Introduction of The Postman Tool — Client-server architecture, API request lifecycle & workspace setup
Installation of Postman Tool — Native desktop setup, account sync, environments & preferences
What is GET Method with realTime example — Query parameters, path variables, status codes & payload inspection
What is POST Method with realTime example — Raw JSON payload creation, headers, 201 Created validation
What is PUT Method with realTime example — Full resource replacement, update headers, response verification
What is Difference Between Put and Patch HTTP Methods — Partial vs. complete update, idempotency rules & best practices
What is Sending DELETE Request in Postman — Deleting entities, 204 No Content vs 200 OK, state checks
Understand Environment & Variables in Postman — Global, Environment, Collection & Local variable scopes

Automation, Data-Driven & Auth

Adding Automation Test Scripts In Postman — Writing JS assertions with pm.test() and pm.expect()
Working with Data driven Testing in Postman — Running automated suites against external CSV and JSON data files
How to use variable in Postman — Dynamic variables ({{$randomEmail}}, {{$guid}}) and programmatic extraction
Another way to use collection variables — Request chaining, setting variables via script for downstream API calls
Authorization & Type of Authorization — Understanding API security protocols, headers & credential passing
What is API Key Authorization? — Passing secret keys in query parameters vs request headers
What is Bearer Token? — JWT tokens, token generation, header injection, expiry & automated renewal
What is Oauth 2.0? — Client ID/Secret, Auth URLs, Access Token retrieval, and secured endpoints

Setup & First CRUD Programs

Introduction to REST Assured — Architecture, BDD DSL (given(), when(), then()), Hamcrest matchers
Project Set up in Eclipse IDE — Maven pom.xml setup, TestNG, RestAssured & JsonPath dependencies
Write First Program for GET REST Assured Test — BaseURI, endpoint execution, status code & header assertions
Write First Program POST Request in REST Assured — Sending body strings, setting content-type & validating 201
Write First Program PUT Request in REST Assured — Full resource updates, passing path params, response verification
Write First Program PATCH Request in REST Assured — Targeted partial modification & unaffected field verification
Write First Program DELETE Request in REST Assured — Entity removal, verifying 200 / 204 & subsequent 404

RequestSpecification & Jackson API

How to write API Response in a JSON File — Capturing streams & persisting raw response payloads to disk
What is RequestSpecification — Reusable spec builders, baseURI, common headers, auth & logging filters
How to Send a JSON/XML File as Payload to Request — Reading external static files directly into .body()
Creating JSON Object Request Body Using Java Map — Dynamic payload construction using HashMap<String, Object>
How To Create a JSON Object Using Jackson API – ObjectMapper – createObjectNode() — Runtime JSON tree creation
How To Use Java Object As Payload For API Request — Strongly-typed object instances with auto-serialization
How To Create JSON Array Using Jackson API – ObjectMapper – CreateArrayNode() — Assembling batch payload arrays

POJO Architecture & Modeling

What is Plain Old Java Object (POJO) ? — Clean architecture, encapsulation, getters/setters & SDET advantages
How to create POJO classes of a JSON Object Payload — Field mapping, annotations (@JsonProperty), constructors
How To Create POJO Classes Of A JSON Array Payload — Handling arrays of items via List<ItemPOJO> structures
How To Create POJO Classes Of A Nested JSON Payload — Modeling complex multi-tier parent-child JSON object hierarchies

Dual Serialization (Jackson & Gson)

Serialization – Java Object To JSON Object Using Jackson API — ObjectMapper.writeValueAsString() deep dive
De-Serialization – JSON Object To Java Object Using Jackson API — ObjectMapper.readValue() and response.as(Class)
Serialization – Java Object To JSON Object Using Gson API — Gson.toJson() conversion for lightweight data workflows
De-Serialization – JSON Object To Java Object Using Gson API — Gson.fromJson() converting response strings to Java classes

JSON Schema & JsonPath Syntax

What is JSON Schema — Contract definition, Draft-07 specifications, mandatory properties & data types
JSON Schema Validation in Rest Assured — matchesJsonSchemaInClasspath() contract compliance testing
How To Create JsonPath For Simple And Nested JSON Array? — Dot and bracket navigation, wildcard traversal
Write JsonPath expressions or JsonPath syntax — Advanced Groovy GPath queries, findAll, max, min & conditions

Framework & Interview Preparation

How To Parse A JSON Array Response To A Java List In Rest Assured? — jsonPath().getList() for bulk validations
Framework Development — Modular enterprise test framework: BaseTest, ConfigReader, Endpoints, TestNG, Extent/Allure Reports & Git
Mock Interview + Resume Preparation — Real-time SDET scenario questions, technical interview simulations & resume tailoring by Mohit Kumar

Want the Complete Official Syllabus PDF?

Download the official curriculum PDF covering Postman API, REST Assured, POJOs, Jackson/Gson serialization, JSON Schema, framework architecture, and interview prep.

API Testing (Postman + Rest Assured)

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