How does TDD make refactoring easier?

Question

I\'ve heard that projects developed using TDD are easier to refactor because the practice yields a comprehensive set of unit tests, which will (hopefully) fail if any change has

Answer 1

I would recommended (as others have):

• Refactoring: Improving the Design of Existing Code - Martin Fowler
• Test Driven Development: By Example - Kent Beck
• Patterns of Enterprise Architecture - Fowler et al.