What is TDD??

What is TDD??

Test Driven Development (TDD) is a development technique whose main principle is that we write our test cases before implementation of the functions(Unit Tests).It involves designing and developing tests for every small functionality.

Steps in TDD

  • Write the function signature -Parameters that the function takes
  • Write test cases for the function Should always fail at first because there is no implementation
  • Write function logics to satisfy our test cases

Each test should only have a single assertion

Good tests should have the following characteristics

  • Scope - This is the test coverage for our code.
  • Speed - How fast our test cases run
  • Fidelity- How close our test cases are to a real scenario
  • Not a flaky test - Flaky tests are tests that sometimes succeeds and sometimes fails.
  • Each tests should be independent

So Why TDD?

This approach helps take small significant steps when writing software.

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