Nuggets of Testing Wisdom from Kent Beck on Software Engineering Radio

I really like this interview on Software Engineering Radio with Kent Beck by Martin Lippert: Episode 167: The History of JUnit and the Future of Testing with Kent Beck".  A few good tidbits:

• Testing at different levels: In response to a question about the development of BDD (behavioral driven testing) in response to his TDD (test driven development), he mentions the importance of testing at different levels of code, from unit tests to behavioral or acceptance tests, suggesting that BDD is entirely compatible with and perhaps a refinement of TDD.
• Flexibility and trade-offs: He recommends considering the cost or appropriateness of testing under different circumstances, an idea that again applies to testing at different levels.  Exploratory coding should probably not require a TDD approach, because short-term costs in exploratory coding are important.  I would argue this notion applies to creative processes in general -- brainstorming activities are more about volume than perfection.
• Stories and DRY: He says of DRY (the principle don't repeat yourself), "I don't subscribe to [it] for test code because I want my tests to read like a story."  The story theme runs throughout the interview.