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Test Driven Development

What is Test Driven Development (TDD)?

TDD is a process of writing the test code before writing the functional code. In the TDD the tests are developed even before implementing the feature. At the first level the test will fail because we are not yet implemented the functional code. To make the test pass, we need to implement the functional code.

TDD workflow

The TDD follows the flow of "Red, Green, Refactor"
  •     Identify the smallest behavior of the application and add the test
  •     The test may fail
  •     Write the functional code to make the test pass
  •     Run the test case and make sure the tests pass
  •     Refactor the code, if required
  •     Repeat the process for the complete application behaviors

Flow diagram for Test Driven Development (TDD)

 

Advantage of TDD

  •     Early bug identification
  •     Good understanding of code
  •     Better design and more extensible code


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