TDD vs BDD vs ATDD: Development methodologies to manage complex development processes without problems

The last decade in the history of humanity can simply be called a tech revolution. The pandemic has made it more acute than ever. Developers must grasp up modern languages, structures, tools, and methods that appear at each moment.

When new codes and processes are being introduced daily, even the most experienced and expert developers can become overwhelmed with what, how, when, and for what purpose they should write codes.

The above constant fluctuation can be quickly navigated using organized methods that concentrate on the developer's task. Such methods act as a base for developers and their developments. TDD vs BDD vs ATDD are different methods.

Test-Driven Development (TDD)
The method of test-driven development is to improve test cases before developers begin to write code. These analysis samples are small units depending on the necessities of the whole software.

Behavior-driven Development (BDD)
TDD has been replaced by behavior-driven development (BDD). This method defines whether or not all of the app's units function following the overall app idea.

In this elongated version of TDD, a higher-level test, also known as a functional test, is designed to rule out additional code writing requirements for the app's best functionality.

GWT: The language of BDD
In BDD, the approval test is formed by determining the user story. All developers, examiners, QAs, specialists, and output managers meet to go over the conditions for each user story.

To write user story examples, the team employs the Gherkin programming language. This approach of GWT, which stands for Given-When-Then, is used by the domain specific language Gherkin, which has its syntax. They are as follows:

Given: A real-world scenario or a platform for the user to take the test and a username and password or the user's credentials are provided.
When: The user's actual action or the user's pressing of the login button.
Then: The result of the previous stage's action, returning the user to the home screen or displaying a successful validation message.
Acceptance Test-driven Development (ATDD)
It can look like the mixture of TDD and BDD. But, unlike the former two methods, this technique focuses on satisfying the demands of users rather than on achieving the predicted response. This method is also known as Story Test-driven Development (STDD).

TDD vs BDD vs ATDD: Which method should you choose?
Software development focuses on regular growth and flexibility to evolving needs. These methods guarantee that developers receive sufficient help in these continually evolving conditions. Using unit testing and approval testing, developers can recognize specific app needs and design a working product that meets all stakeholders' expectations in the development lifecycle.