TDD: WHEN NEEDED, ADN MOST IMPORTANTLY, WHEN NOT

Software testing is a procedure that allows to confirm or deny the performance of the code and the correctness of its work. Thus, testing plays an important role in software development, because the quality of the code and productivity depend on the choice of the testing method. Unit testing is the most common testing method that aims to test each piece of code. Among the various approaches to unit testing, Test-Driven Development (TDD) and Test Last Development (TLD) are the most common. Therefore, this paper discusses 2 main methods of software development: TDD and TLD. This work is aimed to analyze the effectiveness of TDD as opposed to TLD. As a result, the effectiveness of TDD slightly exceeds TLD. Granularity, uniformity, and refactoring showed positive key results in terms of code quality and performance, while sequencing did not significantly affect any of these factors.Thus, during software development, it is worth applying separate TDD processes, such as granularity, uniformity, and refactoring.