Learn API Testing using Postman, SoapUI & RestAssured from 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
HTTPS
HTTP Status Codes

Module 2: API Testing with Postman

Postman Introduction
- Postman Installation
- Creating Workspace
- Creating Collections
- Creating HTTP Requests (
- 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: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

What's inside

Learning objectives

You will be able to understand what the rest api's are, and their functionality.
After completing this course you can start working on rest api testing projects

You will learn how to build frame works in postman and restassured
You will learn ci & cd integration with postman & restassured

You will be able to understand what the rest api's are, and their functionality.
After completing this course you can start working on rest api testing projects
You will learn how to build frame works in postman and restassured
You will learn ci & cd integration with postman & restassured

Syllabus

File Upload (multipart/form-data)
Authorizations

Writing API test cases.

Reference Documents.

What is Client & server?
Client-server architecture
What is an API?
What is API Testing? Why it is needed?
Types of an API - SOAP & Rest
API Vs Webservice
Rest API methods
http Vs https

Postman Introduction
Postman installation
Creating Workspace
Creating Collection
Creating Requests - Get, Post, Put & Delete
Saving & Editing Requests
Operations on Collections
Things to be validated in response
Status codes
Cookies & Headers
Response body

Creating Dummy API’s for API Testing
JavaScript Object Notation (JSON)

Validating Response by adding Tests
Testing status codes
Testing headers
Testing cookies
Testing response time
Testing response body

Working with Variables
Scripts in Postman
Pre-request Scripts
Test Scripts & Validations
Working with Variables
Get and Set Variables with Scripts

Chaining Requests

Data Driven Testing using JSON & CSV files

Install newman
Install newman-reporter-html for reporting
Exporting and Sharing Collection from postman
Run collection in command prompt locally
Push collection to GitHub then run it in Jenkins

Install Postman CLI
Use Postman CLI to run a collection from the command line
Postman CLI to run collections on the CI/CD pipeline
Swagger
cURL

Mock Server
Performance Testing

Introduction to RestAssured

Setting RestAssured Maven Project

Including The Required REST Assured and Other Dependencies

Static imports

Writing first REST Assured API Automation Script

HTTP Methods

GET

Post

Put

Delete

Authentications Types

Parsing Data

Parsing JSON response

API Chaining

Framework part 2

Framework part 3

Git

Github

Jenkins

Career center

Learners who complete Learn API Testing using Postman, SoapUI & RestAssured will develop knowledge and skills that may be useful to these careers:

API Test Automation Engineer

An API Test Automation Engineer focuses on designing, developing, and maintaining automated tests for application programming interfaces to ensure their reliability and functionality. This includes validating data exchange, security protocols, and performance under various conditions. This course directly addresses the core competencies for an API Test Automation Engineer. Learners will master tools like Postman for creating HTTP requests, validating responses with Chai Assertions, and building data-driven tests using JSON and CSV files. Furthermore, the course teaches advanced automation with RestAssured, covering framework development, handling authentication, parsing responses, and integrating tests into CI/CD pipelines using Git, GitHub, and Jenkins. The specific modules on GraphQL testing, performance testing in Postman, and Newman CLI for reporting are particularly relevant, providing a comprehensive skill set for success in this role by enabling the creation of robust, scalable test solutions.

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Automation Test Engineer

An Automation Test Engineer specializes in creating and implementing automated tests for software applications, streamlining the quality assurance process and accelerating development cycles. This role demands proficiency in scripting, test framework design, and continuous integration. This course provides an exceptionally strong foundation for an Automation Test Engineer. It systematically covers the essential skills required for automating backend tests, from understanding client-server architecture to mastering tools such as Postman for scripting and validating API responses, and RestAssured for building robust automation frameworks using Maven and TestNG. The curriculum's focus on data-driven testing, API chaining, and the integration of automation into CI/CD pipelines using Newman CLI, Postman CLI, and Jenkins ensures that learners can immediately apply their knowledge to real-world automation challenges, making them highly competitive for this career path.

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Quality Assurance Engineer

A Quality Assurance Engineer is critical in ensuring software products meet stringent quality standards by identifying defects and ensuring functionality, reliability, and performance. This often involves manual and automated testing across various application layers. This course equips aspiring and current Quality Assurance Engineers with specialized skills in API testing, a crucial component of modern software quality. By covering the fundamentals of API types, HTTP methods, and status codes, alongside in-depth practical application with Postman, SoapUI, and RestAssured, learners develop a comprehensive understanding of backend validation. The inclusion of topics like JSON schema validation, authorization types, and performance testing allows individuals to approach quality assurance with a deep technical perspective, enabling them to effectively uncover issues at the integration layer and contribute significantly to overall product quality.

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Software Developer in Test

A Software Developer In Test integrates programming skills with testing expertise to build sophisticated automated testing solutions and frameworks, often working closely with development teams. This role moves beyond simple test execution to encompass design and architecture of testing infrastructure. This course is highly beneficial for aspiring Software Developers In Test, as it delves deeply into building API automation frameworks with RestAssured. Learners will gain hands-on experience in setting up Maven projects, creating POJO classes, handling payloads, and developing comprehensive test suites with TestNG, including generating Extent and Allure Reports. The course's emphasis on scripting in Postman, implementing API chaining, and integrating tests with CI/CD tools like Git and Jenkins cultivates a development-centric approach to testing. This prepares individuals to engineer robust, maintainable, and scalable test automation solutions, a cornerstone of the Software Developer In Test role.

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Quality Assurance Lead

A Quality Assurance Lead guides testing teams, defines testing strategies, and oversees the implementation of quality assurance processes to deliver high-quality software. This leadership role requires a strong technical background and an ability to mentor others. For a Quality Assurance Lead, this course provides an invaluable deep dive into API testing and automation, equipping individuals with the technical mastery necessary to strategize and lead effectively. Understanding framework development with RestAssured, including creating scalable Maven projects, managing test data, and generating detailed reports, allows a lead to set high standards and best practices for their team. Furthermore, comprehensive knowledge of Postman's capabilities, CI/CD integration using Newman CLI and Jenkins, and various authorization types enables a lead to make informed architectural decisions and troubleshoot complex automation challenges, fostering a robust and efficient quality culture.

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DevOps Engineer

A DevOps Engineer bridges development and operations, focusing on automating and streamlining software delivery pipelines, improving system reliability, and fostering collaboration. This role requires expertise in continuous integration, continuous delivery, and infrastructure as code. This course is directly relevant for a DevOps Engineer, particularly its emphasis on integrating API testing into CI/CD pipelines. Learners will gain practical experience with Newman CLI to run Postman collections locally and in command prompts, and crucially, learn to push collections to GitHub and run them in Jenkins. The course also covers the installation and use of Postman CLI for running collections in CI/CD pipelines, including setting up GitHub Actions. This skill set is fundamental for a DevOps Engineer to ensure that API reliability and functionality are continuously validated throughout the software development lifecycle, speeding up releases while maintaining quality.

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Performance Test Engineer

A Performance Test Engineer evaluates software system responsiveness, stability, scalability, and resource usage under various load conditions to identify bottlenecks and ensure optimal user experience. This specialized role focuses on system efficiency. This course, "Learn API Testing using Postman, SoapUI & RestAssured", helps build a foundational understanding for a Performance Test Engineer. Specifically, the module on performance testing within Postman covers crucial aspects such as running performance tests, understanding different load profiles, and viewing performance test metrics. It also introduces injecting data into virtual users, which is a core concept in simulating realistic load scenarios. While focusing on API-level performance, the insights gained into response times, system behavior under load, and the analytical approach to metrics are highly transferable, helping individuals to assess and improve the efficiency of backend services.

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Site Reliability Engineer

A Site Reliability Engineer applies software engineering principles to operations problems, ensuring the reliability, availability, performance, and scalability of large-scale systems. This often involves monitoring, incident response, and automation. This course is highly beneficial for a Site Reliability Engineer by providing a deep understanding of API behavior and robust testing strategies. Expertise in API testing with Postman and RestAssured can help an SRE proactively monitor API health, quickly diagnose issues by understanding HTTP status codes and response bodies, and ensure API contracts are maintained. The course's coverage of performance testing, even at an introductory level, helps in identifying potential bottlenecks, while CI/CD integration knowledge aids in automating reliability checks. This comprehensive view of API functionality and testing fosters a methodical approach to maintaining critical backend services.

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Integration Engineer

An Integration Engineer designs and implements solutions that enable different software systems and applications to communicate and work together seamlessly. This role heavily relies on understanding various communication protocols and data exchange formats, with APIs being central. This course offers significant value for an Integration Engineer by providing an in-depth exploration of API fundamentals, including REST and SOAP, and practical skills in testing their interactions. Learners will gain expertise in handling diverse authentication types, parsing different response body formats like JSON and XML, and crucial API chaining techniques with Postman and RestAssured. This comprehensive knowledge empowers an Integration Engineer to validate secure and efficient data flow between systems, troubleshoot integration points effectively, and ensure the reliability and compatibility of interconnected services, which is vital in modern distributed architectures.

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Application Programmer Interface Designer

An Application Programmer Interface Designer creates the specifications and contracts for APIs, ensuring they are intuitive, consistent, and serve the functional requirements of developers who will consume them. This role requires a strong grasp of API best practices and usability. For an Application Programmer Interface Designer, this course offers a unique perspective by deeply immersing learners in how APIs are tested and consumed. Understanding the intricacies of validating HTTP requests and responses, handling various authorization schemes, and the challenges of data-driven testing using tools like Postman, SoapUI, and RestAssured, directly informs better API design. The modules on GraphQL, documenting APIs with Swagger, and creating mock servers are particularly relevant, enabling designers to craft more testable, well-documented, and developer-friendly APIs, ultimately leading to higher adoption and smoother integration experiences.

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Technical Writer

A Technical Writer translates complex technical concepts into clear, concise, and user-friendly documentation, including API specifications, user manuals, and online help. Accuracy and clarity are paramount in this role. For a Technical Writer, this course directly supports the creation of high-quality API documentation. The specific module on "Documenting APIs" covers creating public documentation, writing Markdown descriptions at request, folder, or collection level, and embedding "Run in Postman" buttons. Learners also gain exposure to Swagger and cURL, essential tools and formats for API reference. By understanding how APIs function, are structured, and are tested through Postman, SoapUI, and RestAssured, a Technical Writer can produce more accurate, comprehensive, and developer-friendly API reference documents, enabling seamless adoption and integration for consumers.

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Full-Stack Developer

A Full Stack Developer works across both the front-end (user interface) and back-end (server, database) of web applications, requiring a broad understanding of the entire system architecture. This role involves developing, deploying, and maintaining all layers of an application. This course may be useful for a Full Stack Developer by providing a profound understanding of backend application programming interfaces. As a Full Stack Developer, interacting effectively with APIs is crucial, and this course helps by covering client-server architecture, HTTP methods, authorization types, and JSON/XML parsing. Learning to test APIs with Postman, SoapUI, and RestAssured allows for more robust integration of front-end and back-end components, proactive debugging, and a stronger grasp of API contracts. This comprehensive knowledge of API functionality and testing helps to build more resilient and performable full-stack applications.

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Backend Developer

A Backend Developer focuses on the server-side logic, databases, APIs, and architecture that power the front-end of applications. This role is responsible for creating, maintaining, and optimizing the core functionalities and data storage. This course may be useful for a Backend Developer by offering an inverted but highly valuable perspective on API development. By learning to critically test APIs using Postman and RestAssured, a developer gains a deep understanding of common pitfalls, security vulnerabilities, and performance considerations from a consumer's standpoint. The explicit coverage of REST, SOAP, GraphQL, various authentication types like OAuth2, and JSON/XML formats helps in designing more robust, testable, and secure APIs. This knowledge helps a Backend Developer to build higher-quality, more reliable services that meet external and internal consumer expectations more effectively.

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Solutions Architect

A Solutions Architect designs and oversees the implementation of complex technical solutions, translating business requirements into scalable and robust system designs. This role requires a broad technical understanding across various domains and technologies. This course may be useful for a Solutions Architect by deepening their understanding of application programming interface interactions and quality. A Solutions Architect benefits from knowing how APIs are built, secured, and validated with tools like Postman and RestAssured. This insight enables better design decisions, ensuring architectural choices support testability, maintainability, and performance. Understanding CI/CD integration of API tests helps in designing resilient delivery pipelines. The knowledge of GraphQL, various authentication mechanisms, and performance testing contributes to creating more robust and future-proof solution architectures that inherently prioritize quality and reliability.

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Cloud Engineer

A Cloud Engineer designs, implements, and manages cloud infrastructure and services, leveraging platforms like AWS, Azure, or Google Cloud. This role often involves extensive interaction with cloud provider APIs to automate deployments and manage resources. This course may be useful for a Cloud Engineer by providing a solid foundation in interacting with and testing application programming interfaces, which are central to cloud operations. Cloud services are heavily API-driven, and skills in using Postman for HTTP requests, understanding authorization types (like OAuth2), and parsing JSON responses are directly transferable. The knowledge of CI/CD integration, particularly with GitHub Actions, can also be applied to automate cloud resource provisioning and validation. This understanding of API mechanics and testing helps a Cloud Engineer to effectively automate cloud workflows and troubleshoot issues at the API layer.

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