It could store the configuration property names as constants, typically in an interface, and access values directly via the configuration API.
它可以将配置属性的名称存储为常量(通常是在一个接口中)，然后直接通过配置API访问值。
It reduces redundant test code and can enforce a standardized mechanism to perform some tasks and keep track of values returned by the API methods.
它减少了冗余测试代码，能够强制使用标准的机制执行任务，并且可以跟踪api方法的返回值。
Just like arrays, there is no API for directly accessing hash values.
就象数组那样，没有用于直接访问散列值的API。
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