创建这个事件是为了确保，定义在代理中的任务应该被成功执行，无需在每次代理运行时检查任何条件。
This event is created to make sure as the tasks defined in the agent should be executed successfully without checking for any condition whenever the agent is run.
该测试的成功执行(如清单21所示)能确保模板和页面层次结构是相匹配的。
Successful execution of this test, as shown in Listing 21, ensures that the template and the page hierarchy match.
它确保类的某个特定方法成功执行一系列特定的任务。
They ensure that a particular method of a class successfully performs a set of specific tasks.
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