tesztvezérelt

Tesztvezérelt development, often abbreviated as TDD, is a software development practice that emphasizes the creation of automated tests before writing the actual production code. This approach follows a simple, repetitive cycle: first, a programmer writes a failing automated test case that defines a desired improvement or new function. Next, they write the minimum amount of production code necessary to pass that test. Finally, the programmer then refactors the new code to maintain quality and improve its design while ensuring all tests continue to pass.

The core principle behind TDD is to ensure that code is written to satisfy specific, well-defined requirements expressed as tests. This iterative process helps developers to design software that is more modular, maintainable, and less prone to bugs. By writing tests first, developers are forced to think through the intended behavior of the code before implementation, leading to clearer designs and a better understanding of requirements.

TDD can lead to significant improvements in code quality and reduce the cost of fixing defects, as bugs are often caught early in the development cycle. It also serves as a form of living documentation, as the tests themselves describe how the code is intended to be used and behave. While it may initially seem to slow down development, the long-term benefits in terms of reduced debugging time and increased confidence in the codebase are generally considered to outweigh the initial investment.