Webservices API Testing with Postman - Complete Guide from Udemy

What's inside

Learning objectives

Postman basics
Api baiscs
Rest api
Restful web services

Http methods
Http status codes
Json schemas
Api testing

Postman basics
Api baiscs
Rest api
Restful web services
Http methods
Http status codes
Json schemas
Api testing

Syllabus

Introduction

Today we will learn:

A bit about API history
Main components of API
Why we should learn API testing
What opportunities will be available to you right after this course completion

Today we will learn:

How we are going to communicate to make sure that the learning process is efficient
Where to ask questions
How to ask questions
Communication channels, where you can reach out to me.

In this video lesson you will learn how to use resources for the lectures.

Today we will learn:

What is API?
What is a web service?
Why are web services needed?
Where web services are used?
What are pros and cons of API?

Today we will learn:

What are the main existing API types?
What is REST API?
What is SOAP API?
What are the differences between REST and SOAP?

Today we will learn:

What is REST API?
What are its architectural properties?
Why is it needed in Web Applications?
Advantages of REST API

Today we will learn:

What is an HTTP method?
What are several main features of an HTTP method?
What are the main methods of REST API?
Why is each of them needed?

Today we will learn:

What is an HTTP status code?
What are the main types of API status codes?
Why each of them is needed?
What is the connection between HTTP methods and status codes?

Here is our agenda for today:

We will talk with you a bit about Postman history.
Consider main components of Postman.
Understand why we should learn Postman.
Afterwards we will discuss the role of the Postman in software testing process.

Today we will learn:

What is API testing tool?
What are the most popular API testing tools?
Why Postman?
How to install Postam to your machine?
How to perform basic configuration of Postman?

Today we will learn:

What is Trello?
Why is it selected for API testing?
How to create a test account in Trello?
How to set up Trello board for the course?

Today we will learn:

What is authorization in API?
Why is authorization needed?
Why will we need auth token in Trello?
How to generate auth token?
Where to store the generated token value?

Today we will learn:

What is GET method?
When is GET method needed?
Why is GET method needed?
What are the main features of GET method?

Today we will learn:

How can we create a GET method in Postman?
How can we execute a GET method in Postman?
How does the GET method response look like?
How do different GET methods look like?

The home task for today's lesson is the following:

Sign in to Trello
Open Trello API docs page.
Find Get Lists on a board request.
Execute this request for your Test board.
Find Get Cards in a List, Get a Card.
Execute these requests for any of the lists on your Test board.

Today we will learn:

What is JSON schema?
Why is JSON schema needed?
How can we validate a GET response schema?
Which tool can be used to generate a JSON schema?
Which tool can be used to validate a JSON schema?

The home task for today's lesson is the following:

Open https://jsonschema.net/ and https://jsonschemalint.com/ sites.
Execute Get Cards request from our previous home task.
Generate and validate JSON Schema for response array.
Execute Get Specific Card request from our previous home task.
Generate and validate JSON Schema for response object.

Today we will learn:

What is validation test?
How can we validate a GET endpoint?
What are common status codes for GET methods validation?
How to validate a GET endpoint in Postman?

The home task for today's lesson is the following:

Execute Get Specific Card request with valid data.
See that response status code and body are valid.
Validate card id path parameter with invalid format and value.
Validate unauthorized permission attempt.
Validate key, token, and fields query parameters.

Today we will learn:

What is POST method?
When is POST method needed?
Why is POST method needed?
What are the main features of POST method?

Today we will learn:

How can we create a POST request in Postman?
How can we execute a POST request in Postman?
How does the POST request’s response look like?
How to check POST request results?

The home task for today's lesson is the following:

Sign in to Trello and open Trello API docs page.
Find Create a new Card request.
Execute this request for your list.
Pass card name and idList fields in two different ways.
Check that card is added to list via API and UI.

Today we will learn:

How can we validate a POST endpoint?
What are status codes in POST methods validation?
How to validate a POST endpoint in Postman?
How to check that new resource is not created via API?

The home task for today's lesson is the following:

Execute Create a New Card request with valid data.
See that response status code and body are valid.
Validate idList query parameter with invalid format and value.
Do not provide idList query parameter at all.
Validate unauthorized permission attempt.
Validate key, and token query parameters.

Today we will learn:

What is PUT method?
When is PUT method needed?
Why is PUT method needed?
What are the main features of PUT method?

Today we will learn:

How can we create a PUT method in Postman?
How can we execute a PUT method in Postman?
How does the PUT method response look like?
How should we check PUT method work?

The home task for today's lesson is the following:

· Sign in to Trello and open Trello API docs page.

· Find Update a Card request.

· Execute this request for your test card.

· Pass card updated name field in two different ways.

· Check that card is updated via API and UI.

Today we will learn:

How can we validate a PUT endpoint?
What are common status codes for PUT methods validation?
How to validate a PUT endpoint in Postman?
How to check resource not updated via API?

The home task for today's lesson is the following:

Execute Update a Card request with valid data.
See that response status code and body are valid.
Validate ID path parameter with invalid format and value.
Do not provide ID path parameter at all.
Validate unauthorized permission attempt.
Validate key, and token query parameters.

Today we will learn:

What is DELETE method?
When is DELETE method needed?
Why is DELETE method needed?
What are the main features of DELETE method?

Today we will learn:

How can we create a DELETE method in Postman?
How can we execute a DELETE method in Postman?
How does the DELETE method response look like?
How should we check DELETE method?

The home task for today's lesson is the following:

Sign in to Trello.
Open Trello API docs page.
Find Delete a Card request.
Execute this request for your Test board.
Verify that the card was deleted via API and UI.

Today we will learn:

How can we validate a DELETE endpoint?
What are common status codes for DELETE methods validation?
How to validate a DELETE endpoint in Postman?
How to check resource not deleted via Postman?

The home task for today's lesson is the following:

Execute DELETE Specific Card request with valid data.
See that response status code and body are valid.
Validate card id path parameter with invalid format and value.
Validate unauthorized permission attempt.
Validate key, and token query parameters.

Today we will learn:

What are Collection Variables in Postman?
What are Query Variables in Postman?
What are Environment Variables in Postman?
How to manage all of them?

Today we will learn:

How to create automated test in Postman?
How to check the response status code?
How to verify the response has a JSON body?
How to see and evaluate test results?

Career center

Learners who complete Webservices API Testing with Postman - Complete Guide will develop knowledge and skills that may be useful to these careers:

API Tester

The role of an API Tester is to specifically focus on the validation and verification of Application Programming Interfaces, ensuring they function correctly, reliably, and securely. This career is explicitly targeted by the Webservices API Testing with Postman course, as it is designed to make learners an 'API testing expert.' An API Tester utilizes tools like Postman to interact with RESTful Web Services, crafting requests, interpreting responses, and validating data structures. The course directly covers all aspects of this role, from understanding API basics and REST architecture to mastering HTTP methods, status codes, and JSON schemas. Furthermore, the emphasis on practical API testing scenarios and automated tests in Postman prepares learners for real-world challenges. This allows an API Tester to systematically ensure the quality and reliability of the critical interfaces that connect modern web applications. This course is a direct pathway to becoming a highly proficient and in-demand API Tester.

See salaries and explore the career path for API Tester

Quality Assurance Engineer

A Quality Assurance Engineer plays a critical role in ensuring software products meet high standards of quality and functionality. This often involves designing and executing test plans, identifying defects, and working closely with development teams to resolve issues. The Webservices API Testing with Postman course is highly correlated with this career path, as it directly addresses a fundamental aspect of modern software quality: API testing. By mastering Postman basics, understanding RESTful Web Services, HTTP methods, and status codes, and learning to validate JSON schemas, a learner can become proficient in identifying and reporting issues within the very foundation of web applications. This enables success in constructing robust test suites and ensuring the reliability of system integrations. Enrolling in this course will specifically help individuals build a strong skill set in API testing, which is a highly sought-after expertise for any aspiring or current Quality Assurance Engineer looking to advance their capabilities.

See salaries and explore the career path for Quality Assurance Engineer

Software Tester

A Software Tester is responsible for evaluating software to detect bugs and ensure it performs as expected, often covering various types of testing, including functional, performance, and integration testing. The Webservices API Testing with Postman course provides essential skills for anyone pursuing a career as a Software Tester, particularly in the realm of modern web applications. The course's focus on API basics, REST API principles, and practical application of HTTP methods like GET, POST, PUT, and DELETE through Postman directly translates to the day-to-day tasks of verifying web service functionality. Understanding HTTP status codes and validating JSON schemas are crucial for effective defect identification and reporting. This specialized knowledge helps a Software Tester to thoroughly examine the underlying communication layers of software systems, leading to more comprehensive and efficient testing. Taking this course will particularly equip individuals with hands-on expertise in a vital area of software quality assurance.

See salaries and explore the career path for Software Tester

Software Developer Engineer in Test

A Software Developer Engineer in Test commonly known as SDET combines the skills of a software developer with the responsibilities of a quality assurance tester, focusing on building automated test frameworks and tools. The Webservices API Testing with Postman course provides a crucial starting point for an SDET, equipping them with a deep understanding of how to interact with and validate APIs. An SDET needs to understand RESTful Web Services, HTTP methods, status codes, and JSON schemas to effectively design and implement robust tests for the underlying services. The course’s hands-on approach to API testing and the bonus module on automated testing directly supports the SDET's need to write programmatic tests and integrate them into continuous delivery pipelines. This particular course helps build a foundation in API testing methodologies and practical execution, which is essential for developing comprehensive and scalable automation solutions in an SDET role. An advanced degree may be useful for career progression in this field.

See salaries and explore the career path for Software Developer Engineer in Test

Integration Engineer

An Integration Engineer specializes in connecting disparate software systems and applications, ensuring seamless data flow and functionality between them, a task heavily reliant on Application Programming Interfaces. The Webservices API Testing with Postman course provides highly relevant and practical skills for an Integration Engineer. This role frequently involves consuming and configuring multiple RESTful Web Services. A deep understanding of API basics, HTTP methods, status codes, and JSON schemas, as taught in this course, is essential for successfully integrating systems and troubleshooting connectivity issues. The hands-on experience with Postman for crafting and executing API requests, as well as validating responses, directly mimics the work an Integration Engineer performs daily. This course empowers an Integration Engineer to confidently work with various APIs, ensuring reliable and robust system integrations, and effectively diagnosing any communication failures.

See salaries and explore the career path for Integration Engineer

Automation Engineer

An Automation Engineer focuses on designing, developing, and implementing automated solutions for software testing, deployment, and operational tasks, aiming to improve efficiency and reduce manual effort. The Webservices API Testing with Postman course provides foundational knowledge that may be helpful for aspiring Automation Engineers, especially with its bonus module on automated tests in Postman. While not solely an automation course, the principles of structured API testing, understanding HTTP methods, and validating responses lay the groundwork for automating these checks. Learning to create automated tests in Postman, check response status codes, and verify JSON bodies are specific skills that align with the objectives of an Automation Engineer. This may help in developing robust automated API test suites, which are vital components of continuous integration and delivery pipelines. Learners who wish to specialize in test automation will find the practical Postman automation segment particularly relevant.

See salaries and explore the career path for Automation Engineer

Backend Developer

A Backend Developer builds and maintains the server side of web applications, including databases, server logic, and Application Programming Interfaces. While primarily a development role, understanding API testing is incredibly valuable for a Backend Developer. The Webservices API Testing with Postman course offers insights into how APIs are consumed and validated from a tester's perspective, which is crucial for building robust and reliable APIs. Grasping concepts like REST API architecture, HTTP methods, status codes, and JSON schemas from this course helps a backend developer design APIs that are easy to use, well-structured, and less prone to integration issues. It fosters a 'test-driven development' mindset for APIs, enabling them to anticipate potential testing challenges and write more maintainable code. Taking this course helps a Backend Developer to create higher-quality APIs by understanding the expectations and validation processes of API consumers.

See salaries and explore the career path for Backend Developer

DevOps Engineer

A DevOps Engineer bridges the gap between development and operations, focusing on automating and streamlining software delivery pipelines, including continuous integration and continuous deployment. The Webservices API Testing with Postman course may be helpful for a DevOps Engineer by providing a solid understanding of API testing, which is an integral part of automating the software release process. In a CI CD pipeline, automated API tests are crucial for verifying that new code integrations do not break existing functionality. Understanding Postman and the principles of RESTful Web Services, HTTP methods, and status codes allows a DevOps Engineer to effectively incorporate and manage API testing within their automation scripts and tools. This knowledge helps in ensuring that deployments are stable and that services communicate reliably, contributing to faster and safer releases. The course's practical insights into API interaction can certainly aid a DevOps Engineer in building more resilient deployment strategies.

See salaries and explore the career path for DevOps Engineer

Data Engineer

A Data Engineer designs, builds, and maintains data pipelines and infrastructure, often incorporating data from various sources, including APIs. The Webservices API Testing with Postman course may be helpful for a Data Engineer by providing essential knowledge about how to interact with and validate data coming from APIs. When ingesting data from external services, understanding REST API principles, HTTP methods, status codes, and crucially, validating JSON schemas are vital for ensuring data quality and pipeline reliability. The ability to use Postman to test API endpoints, inspect responses, and troubleshoot data extraction issues can significantly aid a Data Engineer in building robust and error-resistant data flows. This course helps to ensure the integrity of data sourced via APIs, allowing for more dependable data engineering solutions and efficient troubleshooting.

See salaries and explore the career path for Data Engineer

Technical Support Engineer

A Technical Support Engineer provides assistance to users encountering issues with software products, often troubleshooting complex technical problems and identifying root causes. For a Technical Support Engineer dealing with web applications and integrations, a foundational understanding of API operations can be immensely beneficial. The Webservices API Testing with Postman course provides insights into API basics, HTTP methods, and status codes, which are key to understanding how different software components communicate. When troubleshooting integration failures or data synchronization problems, the ability to use a tool like Postman to replicate API requests and interpret responses can greatly expedite issue diagnosis. While not directly a testing role, this knowledge may help a Technical Support Engineer to quickly identify whether an issue lies with the API itself, the data being sent, or the interpretation of the response. This course can help one to more effectively diagnose and resolve system integration challenges.

See salaries and explore the career path for Technical Support Engineer

Frontend Developer

A Frontend Developer builds the user interface and user experience of web applications, interacting with backend APIs to display and manipulate data. For a Frontend Developer, understanding how backend APIs function is critical for seamless integration. The Webservices API Testing with Postman course may be useful by providing a practical understanding of API basics, RESTful Web Services, HTTP methods, HTTP status codes, and JSON schemas. This knowledge helps a Frontend Developer to effectively consume APIs, anticipate response structures, handle various error codes gracefully, and debug communication issues between the frontend and backend. Using Postman, as taught in this course, can also serve as a valuable tool for a Frontend Developer to test API endpoints independently of the frontend application, accelerating development and troubleshooting. This course can help a Frontend Developer to better integrate with backend services and create more resilient user interfaces.

See salaries and explore the career path for Frontend Developer

Solutions Architect

A Solutions Architect designs complex software systems, specifying technical requirements and integrating various components to meet business needs, often heavily relying on APIs for connectivity. The Webservices API Testing with Postman course may be useful for a Solutions Architect by providing a practical understanding of how APIs are tested and expected to behave. While not directly performing testing, a Solutions Architect benefits from knowing the intricacies of RESTful Web Services, HTTP methods, status codes, and JSON schemas from a validation perspective. This insight helps them design more robust, testable, and maintainable API architectures. Understanding the challenges and best practices in API testing can lead to better architectural decisions, ensuring that the designed solutions are reliable and performant. This course helps one to comprehend the practical implementation and validation of web services, which is invaluable for designing interconnected systems.

See salaries and explore the career path for Solutions Architect

Technical Writer

A Technical Writer creates clear and concise documentation for software products, including user manuals, help guides, and API documentation. For a Technical Writer tasked with documenting APIs, the Webservices API Testing with Postman course may be helpful in building a comprehensive understanding of the technical details. To accurately document RESTful Web Services, HTTP methods, request and response structures, status codes, and JSON schemas, one must grasp their functionality deeply. The practical experience with Postman gained from this course can enable a Technical Writer to better understand how developers and other consumers interact with the API, allowing for the creation of more accurate, complete, and user-friendly documentation. This course can aid in comprehending the practical aspects of API interaction, which is invaluable for explaining complex technical concepts to various audiences.

See salaries and explore the career path for Technical Writer

Product Manager

A Product Manager defines the vision, strategy, and roadmap for a product, translating market needs into product requirements and overseeing the development lifecycle. While not a technical hands-on role in development or testing, understanding the underlying technical components like APIs is an asset for a Product Manager. The Webservices API Testing with Postman course may be helpful in gaining a clearer perspective on how web services enable product features and integration points. Familiarity with API basics, RESTful Web Services, HTTP methods, and how APIs are tested can help a Product Manager in defining more precise technical requirements, understanding development limitations, and interpreting technical feedback. It enhances communication with engineering teams and helps in making informed decisions regarding product functionality and scalability. This course can help a Product Manager to better understand the technical feasibility and quality implications of API-driven features.

See salaries and explore the career path for Product Manager

Scrum Master

A Scrum Master facilitates agile development teams, ensuring adherence to Scrum principles and practices to optimize team performance and product delivery. While not a technical hands-on role, a basic understanding of the technical work involved, such as API testing, may be helpful for a Scrum Master. The Webservices API Testing with Postman course can provide insights into the complexities and time requirements associated with quality assurance activities for web services. Understanding terms like REST API, HTTP methods, and API testing processes, as covered in this course, can help a Scrum Master to better estimate task durations, identify potential blockers, and facilitate more informed discussions during sprint planning and reviews. This can lead to more accurate project forecasts and an improved ability to guide the development team effectively. This course can help a Scrum Master to better understand the technical aspects of an API-driven project's quality assurance efforts.

See salaries and explore the career path for Scrum Master