Test Driven Development has Revolutionized the Software Development Life Cycle Part II


test driven development

The programming arena is plagued with many issues, which developers can solve, when they follow a software development methodology, which suites the project.

In today’s article we are going to talk about the Test-Driven Development (TDD) methodology, in order to understand this software development method.

As a software development process, TDD relies on the repetition of a very short development cycle.

An automated test case, which defines a desired improvement or new function, is first written by the developer.

The developer can then produce a minimum amount of code, which would pass the test, the code is then refactored to meet the standards accepted.

As an evolutionary approach, TDD forces developers to test before enough production code is written, which would fulfill test and refactoring.

TDD give developers a way to think about their requirements and design, before the functional code is written.

TDD is a programming technique, which helps developers write clean code, which works to accomplish a specific task.

In order to write the test, a developer would first have to think, of what they want the test to accomplish.

Positive, negative and exception, are the three things, which are needed in order to write the tests.

The developer would think of a task positively, and think of what the task should do correctly, if everything is ideal.

In order to think negatively of the same task, the developer would think of anything that could go wrong.

When the developer thinks of alternate sequence of events, which could happen, then the developer is thinking about the exceptions, which could take place.

A set of rhythmic actions are done in a TDD environment, these actions are: Repeat until code is complete: 1) Add a test.

2) Run all tests and see the new one fail.

3) Make a little change.

4) Run all tests and see them succeed.

5) Refactor to remove duplication.

The developer would determine, what the test should do first, then the code is written, in a way so that it passes the test.

A set of broad tests that the software must satisfy, is known as the code specifications, which makes TDD an effective way to create software.

The TDD methodology is a good way to develop higher quality software, in a very short amount of time.

The TDD way of coding can lead developers to write simple and elegant code, and help developers detect bugs early in the development life cycle.

Due to TDD the code is much easier to understand, and the tests can serve as a kind of live documentation.

Developers can also easily maintain and refactor their code, or any other programmer’s code.

Also development is faster and developers are encouraged to think, from an end user point of view.

A development team however, needs to make sure that TDD methodology is the right approach for their software development project.

TDD forces good architecture, and for the code to be more modular, it also helps developers to learn, understand and internalize the key principles of good modular design.

The implementation process is also clear, when the TDD methodology is used, and a safety-net is provided, when developers want to refactor the code.

Thank you, for reading this article!!

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