Running unit tests assures that test case code will continue to find and return the correct objects.
运行单元测试确保测试用例能继续找到并返回正确的对象。
Warning signs - watch out for tests that change frequently, boomerangs, test slippage, just in case code and shotgun surgery.
频繁改动的测试、退回返工、测试延误、以防万一的代码以及霰弹式修改(即到处修改)。
However, even noncancelable tasks should attempt to preserve the interrupted status in case code higher up on the call stack wants to act on the interruption after the noncancelable task completes.
但是，即使是不可取消的任务也应该尝试保留中断状态，以防在不可取消的任务结束之后，调用栈上更高层的代码需要对中断进行处理。
However, even noncancelable tasks should attempt to preserve the interrupted status in case code higher up on the call stack wants to act on the interruption after the noncancelable task completes.
但是，即使是不可取消的任务也应该尝试保留中断状态，以防在不可取消的任务结束之后，调用栈上更高层的代码需要对中断进行处理。
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