How Test-Driven Development (TDD) Shapes Better Designs

As developers, every line of code we write is a crucial decision. That’s where TDD comes in handy. It helps us confirm these decisions by providing feedback.

We make design decisions, and TDD enables us to get feedback.

Testing ensures, but it doesn’t mean it affirms. Testing principles offer a cost-effective and flexible way to extend an existing system. Testable systems provide adaptability for future changes. Yet, having a testable system does not mean the design is robust. It depends on the TDD practice knowledge of the code creator.

The primary benefit of TDD is not adding more tests for the sake of it.

The focus is on breaking down the problem into manageable pieces that can be analyzed. The essential advantage is that the design can only improve by creating more tests.

A better design is measured by comparing two solutions to the same problem.

It is wrong to assume that a system has a better design because it has unit tests. TDD leads to a better design by placing the minor code based on examples. There is no room for speculation.

To understand what a “better design” means, we must first define it. Depending on the problem, this will vary, but…