What is Test First Development (TFD)?

Test First Development (TFD), also known as Test Driven Development (TDD), is a software development approach where tests are written before writing the actual code. The idea behind TFD is to write tests that describe the desired behavior of the code and to use those tests to drive the design and implementation of the code.

Test First Development (TFD), also known as Test Driven Development (TDD), is a software development approach where tests are written before writing the actual code. The idea behind TFD is to write tests that describe the desired behavior of the code and to use those tests to drive the design and implementation of the code.

The basic process of TFD is as follows:

1. Write a test that describes the desired behavior of a small piece of code.
2. Run the test and see it fail.
3. Write the code to make the test pass.
4. Refactor the code if necessary, while ensuring that the tests still pass.
5. Repeat the process with the next piece of code.

TFD is meant to encourage a more disciplined and focused approach to software development, by ensuring that the code meets the desired behavior and requirements before it is written. It also helps to catch bugs early in the development process, making it easier to diagnose and fix them.