What is test-driven development?

Test-Based Testing is an approach to testing where the criterion for passing the test is the compliance of the actual result with the expected one described in the test case. The main focus is on executing pre-prepared tests.

Key features:

• Focus on test cases: Priority is given to executing clearly defined test scenarios that describe input data, execution steps, and expected results.
• Result comparison: The actual result obtained during testing is compared with the expected result recorded in the test case. A mismatch is considered a defect.
• Proactive approach: Tests are developed before or in parallel with the development of functionality based on requirements.
• Limitations: Effectiveness depends on the completeness and quality of the developed tests. Defects not covered by test cases may be missed.

Practical examples:

• Functional testing based on checklists and test cases.
• Regression testing using an existing test base.
• Automation of test cases.

It differs from exploratory testing or ad-hoc testing, where the main focus is on exploring the system without strict frameworks of predefined tests.