In which testing methodology are tests typically automated along with the development of the software?

Test-driven development (TDD) is a methodology where tests are written and automated concurrently with the development of the software. TDD emphasizes a short development cycle, where developers first write a failing test for a new feature, then write the minimum amount of code required to pass that test, and finally refactor the code to improve it. This approach ensures that testing is integrated into the development process from the very beginning, allowing for immediate feedback and a stronger focus on ensuring code correctness as features are developed.

In TDD, each small change in the code is guided by the tests, reinforcing the importance of writing high-quality test cases that define the expected behavior of the software. This tight coupling of testing and development helps in maintaining a clear and functional codebase, as each new feature is backed by a suite of automated tests that provide confidence in the software's reliability.

The other choices do not embody this integration of testing and development as effectively as TDD. A test-first approach is a broader concept and does not necessarily include the automation aspect that TDD specifically requires. Test design specification refers to the documentation that details the test cases but does not imply the simultaneous creation of tests with code. Test scripts are automated tests themselves but do not indicate the methodology of their