Types of Testing

Types of Testing Every QA Must Know

In today's fast-paced software development lifecycle (SDLC), quality is everything. To deliver robust, secure, and high-performing applications, businesses must adopt a thorough software testing approach. Understanding the types of testing  available is crucial to building products that delight users and meet business goals.

At Nitor Infotech, we understand the pivotal role that Quality Assurance (QA) plays in digital transformation. Let’s explore the key types of software testing—both functional and non-functional—that help ensure software reliability, scalability, and security.

1. Functional Testing

Functional testing focuses on validating the features and functionalities of an application based on the business requirements.

• Unit Testing – Conducted by developers to test individual units or components.
• Integration Testing – Checks the data flow between integrated modules.
• System Testing – Ensures the complete system works as intended.
• User Acceptance Testing (UAT) – Conducted by end users to validate the software before launch. 

2. Non-Functional Testing

This type of testing evaluates the performance, usability, and reliability of an application under various conditions.

• Performance Testing – Measures system responsiveness under load.
• Load Testing – Assesses system behavior under expected user traffic.
• Stress Testing – Tests system performance under extreme workloads.
• Security Testing – Ensures data protection and compliance with standards.
• Usability Testing – Evaluates user-friendliness and experience.
• Compatibility Testing – Verifies application behavior across browsers, devices, and platforms.

3. Automation Testing

Manual testing has its place, but automation testing accelerates the QA cycle with higher accuracy.

• Popular tools: Selenium, TestNG, JUnit, Cypress
• Ideal for regression, load, and performance testing
• Helps in continuous integration/continuous deployment (CI/CD)

4. Regression Testing

Every code change brings the risk of introducing bugs. Regression testing ensures that new code doesn’t break existing functionalities. It is often automated to save time during repeated executions.

5. Smoke and Sanity Testing

• Smoke Testing – A quick test to check if the critical functionalities work.
• Sanity Testing – Verifies minor changes or bug fixes in a specific function.

Why Testing Matters at Every Stage of SDLC

Incorporating various types of testing throughout the software development lifecycle ensures higher product quality, faster time to market, and improved user satisfaction. From Agile and DevOps to AI-powered testing frameworks, testing has evolved to be more intelligent and integrated than ever before.

Learn more about our Types of testing.