What is the primary goal of writing tests before code in Test-Driven Development?

The primary goal of writing tests before code in Test-Driven Development (TDD) is to clarify requirements. In TDD, developers begin by writing a test that defines a function or improvements of a function, which helps specify the desired behavior of the code before it is written. This process forces developers to think critically about what the code is supposed to achieve and ensures that they have a clear understanding of the requirements from the outset.

By defining tests first, developers can catch requirement ambiguities early on, leading to better-focused implementation. It also ensures that the code is built to meet specific criteria, which ultimately leads to a more robust and maintainable system. This clarity in requirements is essential, as unclear requirements can lead to significant issues later in the development process.

While other choices may touch on aspects relevant to software development, they do not encapsulate the primary purpose of TDD. Enhancing aesthetics or speeding up coding might be incidental benefits, but they are not the main focus of writing tests beforehand. Increasing testing complexity contradicts the goal of TDD, which aims to simplify the process of verifying that code meets its requirements.