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PlayWright: API Testing Basics

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PlayWright: API Testing Basics

API (Application Programming Interface) testing is a critical aspect of software development that focuses on ensuring that APIs perform as expected. APIs act as the bridge between different software applications, allowing them to communicate and exchange data. Since they are key enablers for most modern software systems, testing them properly is essential to maintaining robust and reliable applications.  Playwright Automation Online Training


What is API Testing?

API testing is a type of software testing that focuses on verifying APIs' functionality, reliability, performance, and security. Unlike UI testing, which involves interacting with the user interface, API testing works directly with the backend. It ensures that the data exchange between various systems is accurate, secure, and efficient.   Playwright Automation Training

API testing is commonly performed using HTTP requests such as GET (to retrieve data), POST (to send data), PUT (to update data), and DELETE (to remove data). The goal is to verify that the API returns the correct responses and performs the expected actions under various conditions.

Types of API Tests

1.     Functionality Testing: Ensures that the API works as intended and returns the expected results.   Playwright Training

2.     Load Testing: Evaluates the API’s performance under high traffic or data load.

3.     Security Testing: Checks if the API is secure and protected against unauthorized access or vulnerabilities like SQL injection, XSS, and data leaks.   Playwright Course Online

4.     Negative Testing: Tests the API's behavior when it receives invalid or unexpected inputs.

5.     Validation Testing: Ensures that the data structure and response meet specified requirements, including headers, status codes, and error messages.  Playwright with TypeScript Training

Key Tools for API Testing

Some popular tools for API testing include:

  • Postman: A widely-used tool for creating, sending, and analyzing API requests.
  • SoapUI: Useful for both REST and SOAP APIs, especially in enterprise applications.
  • Swagger: Helps test APIs while also supporting documentation and design.
  • JMeter: Primarily used for load testing APIs to analyze performance under stress.   Playwright With Automation Training

Best Practices

  • Test early and often: Integrate API testing into your CI/CD pipeline for frequent, automated testing.   Playwright Course Online
  • Validate inputs and outputs: Ensure the API processes requests and responses correctly, even in edge cases.
  • Document your APIs: Well-documented APIs make testing easier by providing clear expectations for inputs, outputs, and error handling.

API testing is essential for ensuring seamless interactions between software systems. By adhering to best practices and utilizing appropriate tools, developers can deliver reliable, high-performance applications.

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