API Testing — JSONPlaceholder
Performed comprehensive API testing on JSONPlaceholder using Postman, validating endpoints, HTTP methods, response structure, status codes, and performance to ensure API reliability and consistency.
Module-by-Module Testing
Validated all GET endpoints for correct response format, status codes, and data integrity. Ensured that filtering and pagination work as expected.
Tested creation of new resources with valid and invalid payloads. Verified proper error handling and status code responses for each scenario.
Tested updating existing resources with valid and invalid payloads. Verified proper error handling and status code responses for each scenario.
Tested deletion of resources with valid and invalid IDs. Verified proper error handling and status code responses for each scenario.
Validated that all API endpoints return appropriate HTTP status codes for different scenarios, including 200 OK, 201 Created, 400 Bad Request, 404 Not Found, and 500 Internal Server Error.
Verified that all API responses follow the defined structure. Ensured consistent formatting of JSON responses and proper handling of nested objects and arrays.
Tested the parsing and serialization of JSON data. Verified that the API correctly handles various JSON structures and edge cases.
Tested the functionality of JavaScript features inside Postman, including dynamic content updates, pm.test assertions, and automated response validation.
Tested all API endpoints for proper functionality and error handling. Verified that each endpoint returns the expected response format and status codes.
Tested the authentication and authorization mechanisms. Verified that only authenticated users can access protected resources and that appropriate permissions are enforced.
Tested the validation of data inputs across various API endpoints. Ensured that the API correctly handles and rejects invalid or malformed data.
Conducted performance testing to evaluate the API's behavior under various load conditions. Measured response times, throughput, and resource utilization.
My Tasks
Created and designed API test cases for all endpoints.
Executed API test cases and documented results, identifying and reporting any defects found.
Analyzed API documentation and requirements to identify critical test scenarios.
Configured and maintained the testing environment, ensuring all tools and resources were properly set up for API testing.
Identified, documented, and reported bugs and inconsistencies.
Collaborated with developers to resolve identified issues and ensure code quality.
Verified JSON structure and ensured data integrity across all API responses.
What I Learned
The QA Mindset
As my first project in API testing, I learned that testing isn't just about finding bugs — it's about understanding the user's journey. A successful tester needs to think like a customer while maintaining the technical rigor of a developer.
API Fundamentals
I gained a solid understanding of API testing principles, including request/response handling, authentication, and error code interpretation.
Postman Skills
I became proficient in using Postman for API testing, including creating and managing collections, setting up environments, and writing automated tests.
Validation Techniques
I learned how to validate status codes, response bodies, and JSON structure effectively using various techniques to ensure data integrity and improve overall API quality.
Debugging & Analysis
I learned how to identify and resolve issues in API responses, using debugging tools and analysis techniques to ensure optimal performance and user experience.
JavaScript for API Testing
Gained practical experience using JavaScript to handle API responses, validate dynamic data, and write basic test scripts — including status validation, response parsing, and data verification inside Postman.
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