test initialization

基本解释

The method is absolutely essential and must be called to avoid test initialization failures.
该方法非常重要并且必须调用它才能避免测试初始化失败。
If you depend on it, it's wise to run a small test during installation or initialization to make sure it works correctly.
如果您依赖它，那么在安装或初始化期间运行小测试来确保它能正确工作，这样做将是明智的。
While this code is specific to a Printer, it is oblivious to whether the test is for printing or initialization, or to whether Printer is the target of a method call or a parameter to a method.
虽然这段代码是针对 Printer 的，但无论测试的是打印还是初始化，无论 Printer 是方法调用的目标还是方法参数，都没有关系。