Which of the following statements describes the principal concept behind test driven development?

Test-Driven Development (TDD) is a software development process where tests are written before the code that needs to pass the tests is implemented. The principal concept behind TDD is to write a test for a new function or method, see it fail, then write the minimum amount of code required to make the test pass, and finally refactor the code while keeping the tests green.

Write a Test: Before writing code, a developer writes a test for the desired function or method.

Run the Test: The new test should fail initially because the function or method hasn't been implemented yet.

Write Code: Implement the minimum code necessary to pass the test.

Run Tests: Run all tests to ensure the new code passes and doesn't break any existing functionality.

Refactor: Clean up the code while ensuring all tests continue to pass.

References:

Test-Driven Development (TDD)