Software testing is primarily divided into two main categories:
- Functional Testing, which verifies what the system does against business requirements
- Non-Functional Testing, which evaluates how the system performs regarding usability, speed, and security.
These categories are executed across different stages, methods, and levels to ensure the final product is stable and reliable.
1. Functional Testing (The "What")
Functional testing focuses on the business requirements of an application, validating that every feature operates according to specified expectations.
- Unit Testing: Checks individual blocks, methods, or functions of code in strict isolation.
- Integration Testing: Verifies that different modules or units work together seamlessly when combined.
- System Testing: Evaluates the complete, fully integrated software system as a whole to check overall business compliance.
- Acceptance Testing (UAT): Conducted by clients or end-users to confirm if the application is ready for real-world deployment.
- Regression Testing: Re-tests existing features after updates or code modifications to ensure no new bugs were introduced.
- Smoke Testing: Runs rapid, high-level checks on core functionalities to verify if a build is stable enough for deeper testing.
2. Non-Functional Testing (The "How")
Non-functional testing evaluates the quality, technical behaviors, and operational readiness of the software rather than specific features.
- Performance Testing: Measures system responsiveness, speed, and resource usage under normal and peak conditions.
- Load Testing: Evaluates how the application behaves under a specific, expected volume of simultaneous users.
- Stress Testing: Pushes the system past its normal performance capacity to find its breaking point.
- Security Testing: Scans the application for internal or external vulnerabilities and cyber threats.
- Usability Testing: Assesses user experience, interface layout, and overall user-friendliness.
- Compatibility Testing: Verifies the software functions correctly across various operating systems, browsers, and devices.
3. Testing Approaches (The "Knowledge")
Software tests are also classified by how much visibility the tester has into the underlying programming code:
- Black-Box Testing: Testing is done completely from the outside, with no knowledge of the internal code or logic structure.
- White-Box Testing: Testing is executed with deep knowledge of the code, loops, data flows, and internal architectures.
- Grey-Box Testing: A hybrid approach where the tester has limited or partial knowledge of the internal system backend.
4. Methods of Execution
Depending on the engineering team's goals and resources, the testing types above can be carried out through two primary execution methods:
- Manual Testing: Human QA specialists manually interact with the user interface and tools to log unexpected defects.
- Automated Testing: Writing scripts and utilizing testing frameworks to execute repetitive test suites with speed and precision.
Keep coding.
Top comments (0)