What are the different types of non-functional tests?



Non-functional testing is a type of software testing that evaluates the non-functional aspects of a system, such as its performance, usability, reliability, and scalability. These tests help assess how well the system performs under various conditions. Here are some common types of non-functional tests:

  1. Performance Testing:

    • Load Testing: Measures the system's performance under expected load conditions.
    • Stress Testing: Evaluates the system's behavior under extreme conditions or beyond its normal capacity.
    • Volume Testing: Assesses the system's ability to handle a large amount of data.
    • Scalability Testing: Tests the system's ability to scale up or down based on user load.

  2. Reliability Testing:

    • Availability Testing: Ensures that the system is available and accessible when needed.
    • Robustness Testing: Checks the system's ability to handle errors gracefully and recover from failures.

  3. Usability Testing:

    • User Interface (UI) Testing: Evaluates the user interface for ease of use, responsiveness, and overall user experience.
    • User Experience (UX) Testing: Focuses on the overall experience of users while interacting with the system.

  4. Security Testing:

    • Vulnerability Testing: Identifies vulnerabilities and weaknesses in the system that could be exploited by attackers.
    • Penetration Testing: Simulates real-world attacks to identify and address security weaknesses.

  5. Compatibility Testing:

    • Browser Compatibility Testing: Ensures that the system works consistently across different web browsers.
    • Operating System Compatibility Testing: Verifies that the system is compatible with various operating systems.
    • Device Compatibility Testing: Ensures that the system functions correctly on different devices, such as smartphones, tablets, and computers.

  6. Scalability Testing:

    • Horizontal Scalability Testing: Evaluates the system's ability to scale by adding more hardware or resources.
    • Vertical Scalability Testing: Assesses the system's ability to handle increased load by enhancing the existing hardware.

  7. Maintainability Testing:

    • Code Review: Examines the code for readability, maintainability, and adherence to coding standards.
    • Code Complexity Analysis: Measures the complexity of the code, identifying areas that may be hard to maintain.

  8. Recovery Testing:

    • Disaster Recovery Testing: Assesses the system's ability to recover from catastrophic failures and resume normal operations.
    • Backup and Restore Testing: Ensures that data can be successfully backed up and restored.

  9. Compliance Testing:

    • Regulatory Compliance Testing: Ensures that the system complies with industry-specific regulations and standards.

These non-functional tests are crucial for evaluating aspects of a system beyond its basic functionality, helping ensure that the software meets performance, security, usability, and other quality criteria. The specific types of non-functional tests selected depend on the nature of the application and its intended use.

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