To refactor on a team, it’s important that each member can refactor when they need to without interfering with others’ work. This is why I encourage Continuous Integration. With CI, each member’s refactoring efforts are quickly shared with their colleagues. No one ends up building new work on interfaces that are being removed, and if the refactoring is going to cause a problem with someone else’s work, we know about this quickly. Self-testing code is also a key element of Continuous Integration, so there is a strong synergy between the three practices of self-testing code, continuous
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