Intern
Have you heard of black box testing?
sobes.tech AI
Answer from AI
Yes.
Black-box testing is a software testing method in which the internal structure, design, and implementation of the tested system are unknown to the tester. The testing is based solely on requirements and specifications, verifying the system's functionality from the user's perspective.
Main characteristics:
- Focus: Testing what the system does, not how it does it.
- Test sources: Requirements, specifications, user stories, business processes.
- Techniques: Equivalence partitioning, boundary value analysis, decision table testing, state diagrams.
- Testing level: Applicable at all levels (unit, integration, system, acceptance), but more commonly used at the system and acceptance levels.
- Advantages: Independence from internal implementation, detection of user-visible defects, ability to conduct tests without access to source code.
- Disadvantages: Does not cover all code paths, may require creating a large amount of test data, low efficiency in finding hidden errors in code.
Examples of application:
- Checking user login with various login and password combinations.
- Testing order placement in an online store.
- Checking the functionality of site search.
- Testing integration with external services.
Black-box testing techniques:
- Equivalence Partitioning: Dividing input data or application states into equivalence classes where the behavior is expected to be the same. Tests are created for representatives of each class.
- Boundary Value Analysis: Testing values at the boundaries of equivalence classes, as errors most often occur there.
- Decision Table Testing: Using a table to model complex business rules and conditions that determine different actions or outcomes.
- State Transition Testing: Testing system behavior when transitioning between different states in response to events.
Comparison with white-box testing:
| Characteristic | Black-box testing | White-box testing |
|---|---|---|
| Knowledge of internal structure | No | Yes |
| Focus | Functionality | Internal logic/structure |
| Test sources | Requirements, specifications | Source code |
| Conducted by | Testers, business analysts | Developers, QA Engineers |
| Finds errors | In requirements, logic | In code, execution paths |