Test-First Development is a best practice in what popular agile framework?

Test-First Development is a key practice in Extreme Programming (XP), an agile framework. In XP, the idea is to write tests before writing the actual code. This approach ensures that every feature is tested right from the start.

Here, a developer begins by writing a test case for a specific part of the program. Then, they write just enough code to make that test pass. Once the test passes, the developer can clean up the code, making it more efficient while still ensuring it passes the test.

This method improves software quality by catching problems early in the process and making development smoother. It also fosters a culture of continuous testing, making sure the software meets its requirements at every step of development.

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