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What is API Testing?

API Testing is a type of software testing that focuses on the application programming interfaces (APIs) to ensure they function as expected. It involves verifying the functionality, performance, reliability, and security of APIs, which serve as the bridge between different software applications.

Key Aspects of API Testing

  • Functionality Testing: This verifies that the API performs its intended functions accurately and as specified in the documentation.
  • Performance Testing: API testing assesses response times, throughput, and scalability to ensure the API can handle the expected load.
  • Security Testing: This focuses on identifying vulnerabilities within the API to protect against unauthorized access and data breaches.
  • Reliability Testing: This evaluates the API's stability and consistency in providing the expected responses over time.

Types of API Testing

Common types of API testing include:

  1. Unit Testing: Checks individual components of the API.
  2. Integration Testing: Ensures that different API endpoints work together correctly.
  3. Load Testing: Assesses how the API performs under heavy usage.
  4. End-to-End Testing: Verifies the API's functionality within the broader application workflow.

Conclusion

API Testing is crucial for ensuring the quality and reliability of data exchange between applications, ultimately contributing to better software development practices.

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