Software Testing Tutorial #21 - What is Non Functional Testing

Software Testing Mentor
18 Nov 202019:02

Summary

TLDRThis tutorial explains the fundamentals of non-functional testing, essential for both interviews and practical projects. The video covers the differences between functional and non-functional testing, focusing on key aspects like responsiveness, stability, and performance under varying loads. It also introduces important testing types, including load, stress, soak, volume, and spike testing, with real-world examples such as e-commerce websites. The tutorial helps viewers understand how to evaluate an application's performance, reliability, and robustness in different scenarios, ensuring users can explain these concepts effectively in interviews.

Takeaways

  • 📝 Non-functional testing is essential to understand for both project work and interviews, as it helps assess an application's performance, stability, and responsiveness.
  • ⚙️ Functional testing checks the features and functionalities based on customer requirements, such as verifying a registration form's behavior.
  • ⚡ Non-functional testing evaluates how an application performs under various conditions, such as load, speed, and reliability, focusing on performance metrics like response time and stability.
  • ⏳ Response time is a critical part of non-functional testing, ensuring that the application loads and responds within an acceptable timeframe.
  • 🚦 Stability testing measures how well an application performs under heavy traffic or load, such as during high-demand events like sales on e-commerce platforms.
  • 💡 Performance indicators include response time, processing time, and the ability to handle concurrent users, which all help in determining the application's efficiency.
  • 📊 Load testing ensures that the application can handle a specified number of concurrent users without performance degradation.
  • 💥 Stress testing pushes the application beyond its limits to determine the point where it breaks or fails under excessive load.
  • 🔄 Soak testing examines how an application performs over an extended period with sustained load, ensuring long-term stability.
  • 🚀 Spike testing evaluates how an application reacts to sudden and sharp increases in user traffic, testing its resilience under sudden load changes.

Q & A

  • What is the primary focus of non-functional testing?

    -Non-functional testing focuses on testing the responsiveness, stability, and performance of an application under different conditions, such as high load or extended usage.

  • How does functional testing differ from non-functional testing?

    -Functional testing verifies if the software works according to its functional requirements, such as whether the registration form works correctly. Non-functional testing, on the other hand, evaluates the system's performance, like how fast the registration page loads.

  • Why is non-functional testing important in an application?

    -Non-functional testing ensures that the application performs well under different conditions, such as handling high user loads or extended operation times, making sure the application is reliable and responsive.

  • What are the common performance indicators in non-functional testing?

    -Common performance indicators include response time, processing time, and concurrent user volume, all of which help assess how the application performs under different conditions.

  • What is load testing and why is it performed?

    -Load testing verifies how the application performs under a specific load of users, ensuring that response times are within acceptable limits as defined by the customer.

  • How is stress testing different from load testing?

    -Stress testing involves pushing the application beyond its normal load limits to find the breaking point, whereas load testing checks if the application meets performance requirements under expected user load.

  • What is soak testing, and what is its purpose?

    -Soak testing involves running the application under a continuous load for an extended period to assess how it behaves over time, ensuring it remains stable under sustained usage.

  • What aspect of an application does volume testing focus on?

    -Volume testing examines how an application handles large volumes of data, particularly its database, to ensure the system remains functional as data size increases.

  • What is spike testing, and when is it used?

    -Spike testing is used to evaluate how an application reacts to sudden increases and decreases in user load, ensuring it can handle abrupt spikes in traffic without crashing.

  • What are the key benefits of non-functional testing?

    -Non-functional testing ensures that an application is reliable, performs well under different conditions, is scalable, and can handle high user loads without compromising response time or stability.

Outlines

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Non-functional testingLoad testingStress testingPerformance testingSoftware testingTest automationConcurrent usersSystem stabilityInterview prepProject management
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