TDD has grown to a point where it is now a mainstream development practice. It’s only natural for businesses to convert to this practice. That said, it helps derive a plethora of business benefits.

A focus on requirements right from the start

As elucidated above, TDD is about writing tests first and everything else second. As a result, this practice helps capturing requirements right at the beginning of the project. This ensures that the code is written in a manner that:

The coding phase is inevitably much more refined and business-focused with this as a baseline.

Reduced programming sophistication

When serving varying demographics, your application incorporates a certain degree of complexity. And the underlying architecture and code handle this complexity. 

But with TDD, such sophistication doesn’t come in the way of the test creation process. Moreover, the extensive focus on test cases ensures that the code evolves structurally. It’s noteworthy that such orderly evolution in code would also result in a more refined and stable architecture. 

Consider this; the developers need to work through a simple process whenever a new function is added:

Documentation for cross-functional teams

Of course, TDD accrues several benefits for both developers and enterprises. But what about documentation? During tests, developers are drawn to the test cases and code in a specific sequence. This ensures that they are focused on their task of writing the most basic code.

But at the same time, all the test cases combined provide a comprehensive description of the feature. Thus, TDD does not require any separate code documentation, at least in terms of what the technical team needs to comprehend the feature.

Naturally, the documentation must be much more consumable for a more layman audience. TDD gives a head start to such teams because of the functional simplicity involved. 

Since the documentation is organized right off the bat, it’s relatively easier for anyone from the cross-functional team who’s joining in to collaborate or perhaps replace someone absent. 

On that note, TDD serves to:

Automation and test coverage

TDD’s principle of writing automated test scripts to help drive agile development for quality assurance is a compelling aspect of the practice. The unit tests created through TDD enable much better results for later verification.

Because each unit test leads to code creation and ultimately refactoring, TDD expedites a 100% test coverage. This effectively translates to a better bug-free code. Considering how tough it is to track down bugs and their corresponding fixes, writing such a high coverage of test cases can go a long way in helping the QA team come up with a clean slate.

Rapid change accommodation

Agility, flexibility, scalability, and adaptability are all pretty much the foundations of agile development and the associated TDD. With TDD, developers have thorough knowledge and documentation of each of the specific functionalities that the application must offer.

This goes a long way in refactoring on-demand, i.e., if a new function is added to the application, its corresponding unit test will come into existence. Subsequently, the developer will update the code to pass the test. 

As such, TDD helps accommodate any immediate changes or additions required for any of the existing functionalities.

Customer-facing methodology

Nothing’s more important than getting the right feedback at the right time. And to make this happen, TDD supports frequent feedback on the development and, on a holistic level, the business needs. 

The whole process of writing functional test cases and the resulting refined code is a swift way of getting feedback on the most basic must-have application functionalities.

As a result, each of the hypotheses in building and refining the application is validated right away. It’s, thus, safe to assume that the application has a higher chance of eliciting positive feedback from the end-users right off the bat.


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